A maize variety breeding device based on molecular marker-assisted technology

Abstract

This invention relates to the field of maize breeding technology and discloses a maize variety breeding device based on molecular marker-assisted technology. The device includes a base and multiple fixed guide rails fixed within the base. A sliding plate is slidably mounted on the base, and multiple movable guide rails perpendicular to the fixed guide rails are slidably connected within the base. Each movable guide rail has a sliding column fixedly mounted at its bottom. The sliding plate has multiple sliding grooves, and the sliding columns slide in corresponding slots. A planting component is located at the intersection of each fixed guide rail and movable guide rail. The planting component includes a movable base, a planting box, and a vertical plate. A movable plate is slidably mounted on the vertical plate of one of the planting components, and a contact sensor is fixed to one end of the movable plate. This invention can automatically adjust the spacing between maize plants at different growth stages, and is simple to operate and highly efficient.

Description

Technical Field

[0001] This invention relates to the field of maize breeding technology, specifically to a maize variety breeding device based on molecular marker-assisted technology. Background Technology

[0002] Molecular marker-assisted selection (MAG) relies on detecting molecular markers closely linked to target trait genes to identify target genes, thereby enabling trait selection. This method is unaffected by environmental factors, is fast, highly accurate, and greatly shortens the breeding cycle, improving breeding efficiency.

[0003] As maize grows, it requires more space at different growth stages to provide sufficient light and ventilation. Existing maize variety breeding devices based on molecular marker-assisted technology typically place planting boxes directly on planting racks. If a larger spacing is used initially, the space utilization of the planting rack is low, and plants that do not meet the target traits need to be removed during the breeding process, resulting in a smaller number of usable samples. If a smaller spacing is used initially, the planting boxes need to be moved frequently to expand the growth space of the maize plants at different growth stages, which is cumbersome and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to provide a maize variety breeding device based on molecular marker-assisted technology to solve the problems mentioned above.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A maize variety breeding device based on molecular marker-assisted technology includes a base and multiple fixed guide rails fixed inside the base. A sliding plate is slidably provided on the base, and multiple movable guide rails are slidably connected inside the base and arranged perpendicularly to the fixed guide rails. Each movable guide rail has a sliding column fixedly installed at its bottom. The sliding plate has multiple sliding grooves, and the multiple sliding columns slide in the multiple sliding grooves in a one-to-one correspondence. The distance between every two adjacent sliding grooves along the moving direction of the movable guide rails is equal. A planting component is provided at the intersection of each fixed guide rail and the movable guide rail.

[0007] The planting assembly includes a movable base and a planting box placed on the movable base, and a vertical plate is fixedly installed on the movable base;

[0008] One of the planting components has a movable plate that slides on its vertical plate, and a contact sensor is fixed to one end of the movable plate.

[0009] In a preferred embodiment of the maize variety breeding device based on molecular marker-assisted technology described in this invention, an electric push rod is fixedly installed on the base, and the telescopic end of the electric push rod is fixedly connected to one end of the slide plate.

[0010] As a preferred embodiment of the maize variety breeding device based on molecular marker-assisted technology of the present invention, the bottom of the movable seat is fixedly equipped with two sets of sliding rods arranged in a cross shape. The two sets of sliding rods are respectively slidably engaged in the movable guide rail and the fixed guide rail, and the sliding rods located at the intersection of the two sets are slidably engaged in the intersection of the movable guide rail and the fixed guide rail.

[0011] As a preferred embodiment of the maize variety breeding device based on molecular marker-assisted technology described in this invention, the bottom of the planting box is provided with multiple water-permeable holes, and at least one of the water-permeable holes does not coincide with the top surface of the moving seat.

[0012] As a preferred embodiment of the maize variety breeding device based on molecular marker-assisted technology according to the present invention, the planting component further includes two fixed pulleys rotatably connected to one side of the vertical plate and a fixed rod fixedly installed on one side of the vertical plate. A threaded sleeve is rotatably connected to the vertical plate, and a slide block is slidably connected to the vertical plate. A guide rod slidably connected inside the vertical plate is fixedly installed at the bottom of the slide block. A spring sleeved on the outside of the guide rod is fixedly connected between the bottom of the slide block and the vertical plate. A movable pulley is rotatably connected to one side of the slide block. A rack is fixedly installed at the top of the slide block. A gear is coaxially fixed to the outside of the threaded sleeve, and the gear and the rack are meshed together.

[0013] As a preferred embodiment of the maize variety breeding device based on molecular marker-assisted technology described in this invention, a pull rope is provided between multiple planting components located on the same fixed guide rail. The pull rope passes sequentially around one fixed pulley, one movable pulley, and one other fixed pulley on one side of each vertical plate. The two ends of the pull rope are respectively fixedly connected to the fixed rods located on the two outermost vertical plates.

[0014] As a preferred embodiment of the maize variety breeding device based on molecular marker-assisted technology of the present invention, wherein: a moving block is fixedly installed on one side of the moving plate, a threaded cylinder is screwed through the moving block, and one end of the threaded cylinder is fixedly connected to one end of the threaded sleeve on the corresponding vertical plate.

[0015] As a preferred embodiment of the maize variety breeding device based on molecular marker-assisted technology described in this invention, wherein: a T-shaped irrigation pipe is fixedly inserted through the vertical plate, the top of the irrigation pipe away from the water flow direction is provided with multiple irrigation holes, and a sealing sleeve for sealing the irrigation holes is rotatably sleeved on the outside of the irrigation pipe, the sealing sleeve being provided with an arc-shaped groove of a triangular structure.

[0016] As a preferred embodiment of the maize variety breeding device based on molecular marker-assisted technology described in this invention, a fixing plate is fixedly installed on one side of the sealing sleeve, a screw is screwed into the inner side of the threaded sleeve, and a connecting rod is rotatably connected between one end of the screw and the fixing plate.

[0017] As a preferred embodiment of the maize variety breeding device based on molecular marker-assisted technology described in this invention, wherein: a fixing frame is fixedly installed at one end of the screw, a soil loosening frame is fixedly installed on one side of the fixing frame, and multiple soil loosening rods are fixedly installed at the bottom of the soil loosening frame.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention determines the growth stage of corn by measuring the diameter of the corn plant stalk. When the corn plant stalk comes into contact with a contact sensor at the end of a moving plate, the sliding plate is controlled to move, causing the sliding groove to push the sliding column and move the moving guide rail. This, in turn, moves the planting boxes in the planting assembly, increasing the distance between adjacent planting boxes and thus expanding the spacing between corn plants to provide more growing space. At the same time, the moving plate moves the contact sensor away from the corn plant stalk by a fixed distance. The diameter of the corn plant stalk can be continuously monitored as the corn grows, and the above operation is automatically repeated in subsequent cultivation processes. This achieves automatic adjustment of the spacing between corn plants at different growth stages, and the operation is simple and highly efficient.

[0020] 2. In this invention, when the planting components are far apart, the length of the pull rope between the planting components increases. Since the length of the pull rope is fixed, the length of the pull rope between the two fixed pulleys on one side of the vertical plate in each planting component decreases. This causes the pull rope to pull the movable pulley upward, which in turn causes the slide block to drive the rack upward, causing the gear to drive the threaded sleeve to rotate. This causes the screw rod to move horizontally and pull the fixed plate through the connecting rod, causing the sealing sleeve to rotate. This allows the arc-shaped groove of the triangular structure on the sealing sleeve to overlap with more irrigation holes on the irrigation pipe. As the corn grows, the spacing between the corn plants increases while the amount of irrigation required by the corn plants automatically increases.

[0021] 3. In this invention, while the screw moves horizontally, the loosening frame is also moved horizontally via the fixing frame. This allows multiple loosening rods at the bottom of the loosening frame to loosen the soil around the corn plants. The loosening operation breaks up the soil compaction layer, increases the gaps between soil particles, and makes the soil structure more loose, significantly improving soil aeration and permeability. This allows the corn plants to obtain more oxygen during growth, which is beneficial to root respiration and growth. At the same time, this loose soil environment helps irrigation water and fertilizer to penetrate downwards and be evenly distributed in the soil, improving the absorption efficiency of water and fertilizer by the corn plant roots, and further improving the cultivation effect of corn seedlings.

[0022] 4. Regarding the movement of the moving plate, when the planting components move away from each other, pulling the rope causes the movable pulley on the corresponding vertical plate to move upward, which in turn causes the slide block to drive the rack to move upward, causing the gear to drive the threaded sleeve to rotate. The threaded sleeve drives the threaded cylinder to rotate, thereby causing the moving block, which is screwed into the threaded cylinder, to move the moving plate and the contact sensor. In this way, the position of the moving plate and the contact sensor is automatically adjusted according to the adjustment of the corn plant spacing. There is no need to set up a separate drive device to drive the moving plate, reducing the equipment manufacturing cost. Moreover, since the pitch of the threaded cylinder is much smaller than the pitch of the screw, the moving distance of the contact sensor driven by the moving plate is smaller, so that it can match the change in the diameter of the corn plant stalk.

[0023] 5. The movable seat of this invention is limited and fixed by two sets of sliding rods arranged in a cross shape at the intersection of the fixed guide rail and the movable guide rail. The two sets of sliding rods slide into the movable guide rail and the fixed guide rail respectively, so that the movable seat can move smoothly with the movable guide rail when adjusting the spacing between corn plants. The movable seat can be removed from the fixed guide rail and the movable guide rail by moving it directly upwards, which makes it easy to remove the excess planting components from the base after removing plants that do not meet the target characteristics. The operation is simple. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the skateboard assembly of the present invention.

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the pull rope assembly of the present invention.

[0028] Figure 5 This is a schematic diagram of the first three-dimensional structure of the planting component of the present invention.

[0029] Figure 6 This is a schematic diagram of the second three-dimensional structure of the planting component of the present invention.

[0030] Figure 7 This is a schematic diagram of the three-dimensional structure of the screw assembly of the present invention.

[0031] Figure 8 This is a cross-sectional view of the screw assembly structure of the present invention.

[0032] Figure 9 for Figure 8 A magnified structural diagram at point A.

[0033] Figure 10 This is a cross-sectional view of the planting component of the present invention.

[0034] Figure 11 for Figure 10 A magnified structural diagram at point B.

[0035] Figure 12 This is a schematic diagram of the three-dimensional structure of the irrigation pipe assembly of the present invention.

[0036] In the diagram: 1. Base; 11. Moving guide rail; 12. Fixed guide rail; 13. Slide plate; 14. Electric push rod; 15. Sliding column; 16. Slide groove; 2. Planting box; 21. Drainage hole; 3. Moving seat; 31. Sliding rod; 32. Vertical plate; 33. Sliding seat; 34. Rack; 35. Gear; 36. Screw; 37. Spring; 38. Threaded sleeve; 39. Guide rod; 4. Irrigation pipe; 41. Sealing sleeve; 42. Irrigation hole; 43. Fixed plate; 44. Connecting rod; 5. Soil loosening frame; 51. Soil loosening rod; 52. Fixed frame; 6. Moving plate; 61. Moving block; 62. Contact sensor; 63. Threaded cylinder; 7. Pull rope; 71. Fixed pulley; 72. Moving pulley; 73. Fixed rod. Detailed Implementation

[0037] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific configurations and algorithms presented below, but covers any modifications, substitutions, and improvements to elements, components, and algorithms without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description in order to avoid unnecessarily obscuring the invention.

[0038] Example 1, referring to Figure 1-12This is the first embodiment of the present invention, which provides a maize variety breeding device based on molecular marker-assisted technology. The maize variety breeding device based on molecular marker-assisted technology includes a base 1 and a plurality of fixed guide rails 12 fixed in the base 1. A slide plate 13 is slidably provided on the base 1. A plurality of movable guide rails 11 are slidably connected in the base 1 and are perpendicular to the fixed guide rails 12. A sliding column 15 is fixedly installed at the bottom of each movable guide rail 11. A plurality of sliding grooves 16 are provided on the slide plate 13. The plurality of sliding columns 15 are slidably engaged in the plurality of sliding grooves 16 in a one-to-one correspondence. The distance between each two adjacent sliding grooves 16 along the moving direction of the movable guide rail 11 is equal. A planting component is provided at the intersection of each fixed guide rail 12 and the movable guide rail 11.

[0039] The planting assembly includes a movable base 3 and a planting box 2 placed on the movable base 3. A vertical plate 32 is fixedly installed on the movable base 3.

[0040] A movable plate 6 is slidably mounted on the vertical plate 32 of one of the planting components, and a contact sensor 62 is fixed to one end of the movable plate 6.

[0041] An electric push rod 14 is fixedly installed on the base 1, and the telescopic end of the electric push rod 14 is fixedly connected to one end of the slide plate 13.

[0042] The bottom of the movable base 3 is fixedly equipped with two sets of sliding rods 31 arranged in a cross shape. The two sets of sliding rods 31 are slidably engaged in the movable guide rail 11 and the fixed guide rail 12 respectively, and the sliding rods 31 located at the intersection of the two sets are slidably engaged in the intersection of the movable guide rail 11 and the fixed guide rail 12.

[0043] The bottom of the planting box 2 is provided with multiple water permeable holes 21, and at least one water permeable hole 21 does not coincide with the top surface of the movable seat 3.

[0044] During the process, the genes of each maize plant are collected at the seedling stage using molecular marker-assisted technology. Maize plants with the target trait gene are selected for further cultivation, while the remaining maize plants without the target trait gene are removed. This ensures that most of the offspring seeds of the maize plant have the target trait gene, thereby shortening the cultivation cycle.

[0045] Then, the planting components containing the corn plants with the target trait gene are concentrated in the middle of each fixed guide rail 12 on the base 1. A movable plate 6 is set on the vertical plate 32 of one of the planting components, so that the contact sensor 62 at the end of the movable plate 6 is at a set distance from the outermost part of the corresponding corn plant stem. When the corn plant grows and its stem thickens to contact the contact sensor 62, it indicates that the corn plant has entered the next stage of growth. At this time, it is necessary to increase the spacing between the corn plants so that the corn can obtain more growing space and provide sufficient light and ventilation. The specific process is as follows:

[0046] When the contact sensor 62 comes into contact with the corn plant stalk, the contact sensor 62 sends a signal to the controller to control the electric push rod 14 to retract its telescopic end, so that the slide groove 16 pushes the slide column 15 to move, thereby causing multiple slide columns 15 to drive the corresponding moving guide rail 11 to move. In this embodiment, multiple slide grooves 16 are symmetrically arranged on both sides with the middle as the axis, so that the moving guide rail 11 located on both sides of the middle drives the corresponding planting components away from the middle planting components from the middle to both sides. The distance between each two adjacent slide grooves 16 along the moving direction of the moving guide rail 11 is equal, so that the distance between each planting component remains equal. This achieves the equal adjustment of the spacing between corn plants in the planting box 2 within the planting component, so that the corn plants can obtain a larger growth space, as well as sufficient light and ventilation space.

[0047] Simultaneously, as the planting components move further apart to increase the spacing between corn plants, the moving plate 6 moves the contact sensor 62 away from the corn plant stalk by a set distance. When the corn plant grows and its stalk thickens to the point of contacting the contact sensor 62 again, the corn plant has already entered the next stage of growth. In this way, the contact sensor 62 can continuously monitor the diameter of the corn plant stalk as the corn grows. After the corn plant stalk contacts the contact sensor 62, the electric push rod 14 is controlled by a signal to repeat the above operation, thereby expanding the spacing between corn plants again. This achieves automatic adjustment of the spacing between corn plants at different growth stages, which is simple to operate and highly efficient.

[0048] In addition, during the seed stage of maize cultivation, more maize samples can be cultivated by making multiple planting components in close contact within the same fixed guide rail 12. Based on statistical principles, this allows for the acquisition of more maize plants that meet the target traits after molecular marker selection, thereby greatly increasing the space utilization rate of the cultivation device.

[0049] Furthermore, the movable seat 3 in the planting assembly is positioned at the intersection of the fixed guide rail 12 and the movable guide rail 11 by two sets of sliding rods 31 arranged in a cross shape. Both sets of sliding rods 31 are inserted into the movable guide rail 11 and the fixed guide rail 12 by sliding insertion. The two sets of sliding rods 31 abut against the inner walls of the movable guide rail 11 and the fixed guide rail 12 respectively, so that when the movable seat 3 moves away from each other to adjust the spacing between corn plants, the movable seat 3 can move smoothly with the movable guide rail 11 by relying on the sliding rods 31. Moreover, the movable seat 3 can be removed from the fixed guide rail 12 and the movable guide rail 11 by moving directly upwards, which makes it easy to remove the excess planting assembly from the base 1 after removing plants that do not meet the target characteristics.

[0050] Preferably, the slide plate 13 has a zigzag guide groove at the outermost ends. The zigzag guide groove consists of an inclined groove and a straight groove parallel to the sliding direction of the slide plate. The two zigzag guide grooves slide and engage with the sliding columns 15 at the bottom of the two outermost moving guide rails 11 in the seed stage. After removing the planting components containing corn plants without the target trait gene and concentrating the planting components containing the target trait gene towards the center, there are no planting components on the two outermost moving guide rails 11. Then, when adjusting the spacing between corn plants to make the slide plate 13 slide, the two zigzag guide grooves push the sliding columns 15 at the bottom of the two outermost moving guide rails 11, causing the two outermost moving guide rails 11 to move to both sides along the inclined groove. When they move to the two ends of the base 1, the two outermost moving guide rails 11 move along the straight groove parallel to the sliding direction of the slide plate. At this time, the two outermost moving guide rails 11 do not block the movement of the other moving guide rails 11, so that there is no need to adjust the two outermost moving guide rails 11, thus improving the overall efficiency.

[0051] In addition, the corn plants are planted in planting box 2. The drainage holes 21 at the bottom of the planting box can prevent water accumulation and oxygen deficiency in the planting box, thus ensuring the normal growth of the corn plants.

[0052] Example 2, refer to Figure 1-12 This is the second embodiment of the present invention, which differs from the first embodiment in that:

[0053] The planting assembly also includes two fixed pulleys 71 rotatably connected to one side of the vertical plate 32 and a fixed rod 73 fixedly installed on one side of the vertical plate 32. A threaded sleeve 38 is rotatably connected to the vertical plate 32, and a slide block 33 is slidably connected to the vertical plate 32. A guide rod 39 slidably connected inside the vertical plate 32 is fixedly installed at the bottom of the slide block 33. A spring 37 sleeved on the outside of the guide rod 39 is fixedly connected between the bottom of the slide block 33 and the vertical plate 32. A movable pulley 72 is rotatably connected to one side of the slide block 33. A rack 34 is fixedly installed at the top of the slide block 33. A gear 35 is coaxially fixed on the outside of the threaded sleeve 38. The gear 35 and the rack 34 are meshed together.

[0054] A pull rope 7 is provided between multiple planting components located on the same fixed guide rail 12. The pull rope 7 passes in sequence around one fixed pulley 71, a movable pulley 72 and another fixed pulley 71 on one side of each vertical plate 32. The two ends of the pull rope 7 are fixedly connected to the fixed rods 73 on the two outermost vertical plates 32 respectively.

[0055] A T-shaped irrigation pipe 4 is fixed through the vertical plate 32. The top of the irrigation pipe 4 away from the water flow direction is provided with multiple irrigation holes 42. A sealing sleeve 41 for sealing the irrigation holes 42 is rotatably sleeved on the outside of the irrigation pipe 4. The sealing sleeve 41 is provided with an arc-shaped groove with a triangular structure.

[0056] A fixing plate 43 is fixedly installed on one side of the sealing sleeve 41, and a screw 36 is screwed into the inner side of the threaded sleeve 38. A connecting rod 44 is rotatably connected between one end of the screw 36 and the fixing plate 43.

[0057] A fixing frame 52 is fixedly installed at one end of the screw 36, a soil loosening frame 5 is fixedly installed on one side of the fixing frame 52, and multiple soil loosening rods 51 are fixedly installed at the bottom of the soil loosening frame 5.

[0058] During use, while adjusting the spacing between corn plants by moving the planting components away from each other, the length of the pull rope 7 between multiple planting components located on the same fixed guide rail 12 remains unchanged. The two ends of the pull rope 7 are fixed to the fixed rods 73 on the two outermost vertical plates 32, respectively. When the planting components move away from each other, the movable seats 3 in each planting component move away from each other, thus increasing the length of the pull rope 7 between the two vertical plates 32 on adjacent movable seats 3. Since the total length of the pull rope 7 is fixed, the length of the pull rope 7 between the two fixed pulleys 71 on one side of the vertical plate 32 in each planting component decreases. This causes the pull rope 7 to pull the movable pulley 72 upwards towards the fixed pulley 71, causing the movable pulley 72 to drive the slide block 33 upwards. The slide block 33 moves upwards along the guide rod 39, and simultaneously the bottom of the slide block 33 is connected to the tension spring 37 of the vertical plate 32, thus causing the slide block 33 to... The moving rack 34 moves upward, causing the gear 35 meshing with the rack 34 to rotate, thereby driving the threaded sleeve 38 on the vertical plate 32 to rotate. This causes the screw 36, which is screwed into the inner side of the threaded sleeve 38, to move horizontally along the axis of the threaded sleeve 38. The screw 36 pulls one end of the connecting rod 44, causing it to move horizontally along the axis of the threaded sleeve 38. This causes the other end of the connecting rod 44 to pull the fixed plate 43, causing the sealing sleeve 41 to rotate. This changes the relative position of the arc-shaped slot of the triangular structure on the sealing sleeve 41 and the irrigation pipe 4, causing more irrigation holes 42 on the irrigation pipe 4 to overlap with the arc-shaped slot of the triangular structure on the sealing sleeve 41. This increases the amount and rate of irrigation for the corn plants, thereby automatically increasing the amount of irrigation required by the corn plants as they grow and the spacing between the corn plants increases, ensuring that the growth needs of the corn plants at different growth stages are met.

[0059] In addition, when the screw 36 moves horizontally along the axis of the threaded sleeve 38, the end fixing frame 52 of the screw 36 moves horizontally, causing the fixing frame 52 to drive the loosening frame 5 to move horizontally. The multiple loosening rods 51 at the bottom of the loosening frame 5 are initially inserted into the soil in the planting box 2, so that while the loosening frame 5 moves horizontally, the multiple loosening rods 51 at the bottom of the loosening frame 5 tillage the soil around the corn plants, thereby achieving the loosening of the soil around the corn plants. Irrigation combined with soil loosening can break up the soil compaction layer, increase the gaps between soil particles, significantly improve aeration and permeability, and make it easier for the corn plants to obtain more oxygen during growth, which is beneficial to the respiration and growth of the roots. At the same time, this loose soil environment helps the irrigation water and fertilizer to penetrate downwards and be evenly distributed in the soil, improving the absorption efficiency of water and fertilizer by the corn plant roots, and further improving the cultivation effect of corn seedlings.

[0060] Furthermore, after the corn cultivation process is completed, the pull rope 7 is removed, and the elastic force of the spring 37 drives the slide 33 to move downward along the guide rod 39, so that the slide 33 drives the pulley 72 to move downward to achieve reset, making the planting component recyclable and reusable, increasing its practicality.

[0061] The remaining structure is the same as that in Example 1.

[0062] Example 3, referring to Figure 1-12 This is the third embodiment of the present invention, which differs from the second embodiment in that:

[0063] A movable block 61 is fixedly installed on one side of the movable plate 6. A threaded cylinder 63 is screwed through the movable block 61. One end of the threaded cylinder 63 is fixedly connected to one end of the threaded sleeve 38 on the corresponding vertical plate 32.

[0064] During use, while the planting components are moving away from each other to adjust the spacing between corn plants, the movable pulley 71 on one side of the vertical plate 32 with the movable plate 6 is pulled by the pull rope 7. The pull rope 7 pulls the movable pulley 72 upward towards the fixed pulley 71, causing the movable pulley 72 to drive the sliding block 33 upward. This causes the sliding block 33 to drive the rack 34 upward, causing the gear 35 meshing with the rack 34 to rotate. This causes the threaded sleeve 38 on the vertical plate 32 to rotate. The rotation of the threaded sleeve 38 simultaneously drives the threaded cylinder 63 fixed at one end to rotate. This causes the movable block 61, which is screwed to the outside of the threaded cylinder 63, to move away from the corn plant stalk. This causes the movable block 61 to drive the movable plate 6 to move, which in turn causes the movable plate 6 to move the contact sensor 6 away from the corn plant stalk by a set distance. In this way, the position of the movable plate 6 and the contact sensor 62 is automatically adjusted according to the adjustment of the corn plant spacing. There is no need to set up a separate drive device to drive the movable plate 6 to move, reducing the equipment manufacturing cost.

[0065] Furthermore, since the pitch of the threaded cylinder 63 is much smaller than the pitch of the screw 36, the rotation of the threaded sleeve 38 causes the moving plate 6 to move the contact sensor 62 a distance much smaller than the moving distance of the screw 36, thereby enabling the moving distance of the contact sensor 62 to match the change in the diameter of the corn plant stalk.

[0066] The remaining structure is the same as that in Example 2.

[0067] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Those skilled in the art, based on a study of the drawings, specification, and claims, should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to identify names rather than to indicate any particular order. No reference numerals in the claims should be construed as limiting the scope of protection. The functionality of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A device for breeding corn varieties based on molecular marker assisted technology, characterized by: The utility model provides a kind of vertical planting device, including base (1) and multiple fixed guide rails (12) fixed in base (1), slidingly equipped with slide plate (13) on the base (1), multiple moving guide rails (11) are slidably connected in the base (1) and are vertically arranged with fixed guide rail (12), each moving guide rail (11) bottom is fixedly installed with slide column (15), multiple slide grooves (16) are equipped on the slide plate (13), multiple slide column (15) are slidably matched in multiple slide grooves (16) one by one, and the distance between every adjacent two slide grooves (16) is equal along the moving direction of moving guide rail (11), and each fixed guide rail (12) and moving guide rail (11) intersection position is equipped with a planting assembly; The planting assembly includes a moving seat (3) and a planting box (2) placed on the moving seat (3), and a vertical plate (32) is fixedly installed on the moving seat (3); One end of the moving plate (6) is fixedly connected with a touch sensor (62). The planting assembly further includes two fixed pulleys (71) rotatably connected to one side of the vertical plate (32) and a fixed rod (73) fixedly installed on one side of the vertical plate (32), a threaded sleeve (38) is rotatably connected to the vertical plate (32), a sliding seat (33) is slidably connected to the vertical plate (32), a guide rod (39) slidably connected to the vertical plate (32) is fixedly installed at the bottom of the sliding seat (33), a spring (37) is fixedly connected between the bottom of the sliding seat (33) and the vertical plate (32), a movable pulley (72) is rotatably connected to one side of the sliding seat (33), a rack (34) is fixedly installed at the top of the sliding seat (33), a gear (35) is coaxially fixed outside the threaded sleeve (38), and the gear (35) and the rack (34) are meshingly connected. A pull rope (7) is arranged between multiple planting assemblies located on the same fixed guide rail (12), the pull rope (7) sequentially passes through one of the fixed pulleys (71), the movable pulleys (72) and the other fixed pulleys (71) on one side of each vertical plate (32), and the pull rope (7) is fixedly connected to the fixed rods (73) on the outermost two vertical plates (32) at both ends. A moving block (61) is fixedly installed on one side of the moving plate (6), a threaded cylinder (63) is screwed through the moving block (61), and one end of the threaded cylinder (63) is fixedly connected to one end of the threaded sleeve (38) on the corresponding vertical plate (32).

2. The device for breeding corn varieties based on molecular marker-assisted techniques according to claim 1, characterized in that it further comprises: An electric push rod (14) is fixedly installed on the base (1), and the telescopic end of the electric push rod (14) is fixedly connected to one end of the slide plate (13). 3.The maize variety breeding device based on molecular marker-assisted technology according to claim 1, characterized in that: The bottom of the mobile seat (3) is fixedly provided with two groups of cross-arranged slide rods (31), and the two groups of slide rods (31) are respectively slidably arranged in the mobile guide rail (11) and the fixed guide rail (12), and the slide rods (31) located at the cross position are slidably arranged in the cross position of the mobile guide rail (11) and the fixed guide rail (12).

4. The device for breeding corn varieties based on molecular marker-assisted techniques according to claim 1, characterized in that it further comprises: The bottom of the planting box (2) is provided with a plurality of water-permeable holes (21), and at least one of the water-permeable holes (21) is not coincident with the top surface of the mobile seat (3).

5. The device for breeding corn varieties based on molecular marker-assisted techniques according to claim 1, characterized in that it further comprises: A T-shaped irrigation pipe (4) is fixedly arranged on the vertical plate (32), the top of the irrigation pipe (4) away from the water flow direction is provided with a plurality of irrigation holes (42), a blocking sleeve (41) for blocking the irrigation holes (42) is rotatably arranged on the outer side of the irrigation pipe (4), and the blocking sleeve (41) is provided with an arc-shaped slot in a triangular structure.

6. The maize variety breeding device based on molecular marker-assisted technology according to claim 5, characterized in that: A fixed plate (43) is fixedly arranged on one side of the blocking sleeve (41), a screw rod (36) is screw-connected to the inner side of the threaded sleeve (38), and a connecting rod (44) is rotatably connected between one end of the screw rod (36) and the fixed plate (43).

7. The maize variety breeding device based on molecular marker-assisted technology according to claim 6, characterized in that: One end of the screw rod (36) is fixedly provided with a fixed frame (52), one side of the fixed frame (52) is fixedly provided with a soil loosening frame (5), and the bottom of the soil loosening frame (5) is fixedly provided with a plurality of soil loosening rods (51).

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