37 results about "Boar semen" patented technology

According to the Hainan pig semen preservation diluent as well as the preparation method, the application and the detection method thereof disclosed by the invention, galangin and kaempferide are added into a basic diluent to develop a diluent formula capable of efficiently preserving semen at a low temperature (4 DEG C); the galangin and the kaempferol added into the diluent have a good sperm protection effect and a certain antibacterial ability and can replace antibiotics, and bovine serum albumin (BSA) is further combined as a low-temperature protective agent, so that sperm movement parameters are improved, and the low-temperature preservation time of the boar semen is effectively prolonged; the use amount of antibiotics in pig raising production is reduced, the problem of drug resistance of bacteria can be effectively relieved, and the use of the antibiotics and the generation of drug-resistant bacteria are greatly reduced. According to the method, the semen utilization rate of excellent breeding boars is increased, sow health is guaranteed, the conception rate of deep insemination is increased, and efficient and low-cost artificial insemination is achieved.

The invention discloses vitality detection equipment for frozen and unfrozen boar semen, and relates to the technical field of biological fluid detection, the vitality detection equipment comprises a main cavity and a driven interference assembly, the driven interference assembly is arranged on the inner wall of the main cavity, and the driven interference assembly comprises a telescopic rod, an electromagnetic support and a set of boosting blades; a metal tank is arranged above the electromagnetic support, the outer wall of the electromagnetic support is coated with a copper arc sleeve, and the copper arc sleeve is made of a non-magnetic material, so that the direction of a magnetic field generated after the electromagnetic support is electrified is vertically upward, and an external force adsorption effect directly acts on the metal tank; according to the method, high-speed impact force generated by water source circulation is used as running power of a mechanical part, and the semen and the solution are mixed through centrifugal force generated by rotation, so that the mechanical part is prevented from being in direct contact and stirring with the semen, and on the premise of accelerating the mixing rate, generation of shearing force can be inhibited, the integrity of sperm cells is guaranteed, and the sperm quality is improved. And the accuracy of subsequent detection results is improved.

The invention relates to the technical field of semen preservative preparation, in particular to a diluent preparation capable of prolonging the normal-temperature survival time of boar semen and a preparation method of the diluent preparation. Glucose, L-glutamine, an antioxidant and polysaccharide components are scientifically proportioned, and an innovative polyethyleneimine-polysaccharide copolymer is combined, so that the normal-temperature survival time of boar semen is prolonged; the dual effects of sperm metabolism regulation and cell membrane protection are realized. The polyethyleneimine-polysaccharide copolymer enhances the biocompatibility and protective ability of the diluent through stable cross-linking of amino and carboxyl, and effectively relieves the problem of sudden change of osmotic pressure and acidity of the traditional preservative. In the formula, antioxidant components, such as reduced glutathione, vitamin E and coenzyme Q10, synergistically reduce oxidative stress and delay sperm senescence. According to the whole formula, proper pH and osmotic pressure are guaranteed, the sperm motility and survival time are remarkably prolonged, the requirement of pig industry for long-term preservation of sperm is met, and the feed additive has remarkable application value and popularization potential.

The invention relates to the technical field of boar breeding, and discloses local boar breeding equipment which comprises a support. The supporting frame is arranged above the support and used for supporting local boars to take sperms; the lifting assembly is arranged between the support and the supporting frame; the protective plate is arranged on the arc-shaped outer wall of the supporting frame; the adjusting assembly is arranged on the outer wall of the protective plate and used for adjusting and supporting local breeding pigs; the semen taking unit is arranged in the supporting frame and is used for manually taking out local boar semen. Through assistance of height adjustment, angle adjustment and the massage assembly, a more comfortable and natural semen collection environment is provided for boars. The optimized semen collection environment can reduce the stress reaction of the boars and improve the semen quality, and the design of the flow guide assembly and the collection mechanism can effectively reduce the waste of the semen in the semen collection and collection process. Therefore, the utilization rate of the seminal fluid is improved, and the production cost is reduced.

The invention discloses an application of gallnut tannic acid as an additive in boar production. The application of the gallnut tannic acid as the additive comprises the application of the gallnut tannic acid as a feed additive in improving the reproductive performance of adult breeding boars and the application of the gallnut tannic acid as a semen diluent additive in improving the normal-temperature preservation quality of boar semen. The feed additive can improve the reproductive performance of adult breeding boars, can significantly improve the sperm density, the total sperm number and the effective sperm number of the boars after being fed for 12 weeks, and improves the oxidation resistance of sperms, sperms and serum; the semen diluent additive can improve the normal-temperature preservation quality of the boar semen, and the sperm motility can still reach 61.20% after the boar semen is preserved for 7 days.

The invention belongs to the technical field of biology, and particularly relates to application of N-Acetyl-D-Glucosamine as an additive in a boar semen diluent preserved at 17 DEG C. The invention further relates to a preparation method of the N-Acetyl-D-Glucosamine. By adding 2.5 mM of N-Acetyl-D-Glucosamine into the boar semen diluent, the activity and the forward movement proportion of boar sperms can be remarkably improved under the preservation condition of 17 DEG C, and meanwhile, no adverse effect is caused on the lipid oxidation state and acrosome integrity of the boar sperms. The method is easy and convenient to operate, low in cost, suitable for the artificial insemination process of a large-scale pig farm and capable of effectively prolonging the preservation time of the boar semen and improving the breeding efficiency.

The utility model discloses a boar semen sealing machine which comprises a mounting frame, a mounting plate is fixedly mounted on the rear side of the mounting frame, a sealing mechanism is arranged in the mounting frame and used for sealing a semen bag, and the boar semen sealing machine relates to the technical field of liquid packaging equipment. According to the boar semen sealing machine, semen bags with different thicknesses can be conveniently sealed through a second heat sealing block and a spring, the boar semen sealing machine is mounted at a proper position on a flow line through a mounting plate, and then the semen bags enter the position between the first heat sealing block and the second heat sealing block through guiding of a first guiding block and a second guiding block; and then a connecting plate is pushed to move backwards through elastic force generated by a spring, then the connecting plate drives a limiting plate to push a second heat sealing block through a second fixing plate to clamp a semen bag for heating for sealing treatment, sealing bags with different thicknesses can be automatically adjusted to meet different extrusion requirements, and the flexibility is good.

The utility model discloses a boar semen storage device relates to the field of veterinary device, including the rotation connection's casing one and casing two, casing one inner ring array is equipped with several with the liquid collecting groove intercommunication's pipe connecting assembly, install the negative pressure adsorption subassembly of the semen in the liquid collecting groove in succession suction into several storage test tubes on the direction switch subassembly, the boar semen is introduced into the liquid collecting groove, and the semen in the liquid collecting groove is introduced into the storage test tube that inserts in the corresponding sleeve in the rotation direction switch subassembly, through the direction switch subassembly in succession boar semen is introduced into several storage test tubes, so this can complete the independent storage of multiple semen, and each sleeve forms the sealed cavity, and through the rotation control of the direction switch subassembly has realized the convenient switching of the separation process, and has ensured that the semen in each sleeve does not mix each other, and is saved separately, and adapts the requirement of the independence of semen, safety when subsequent storage or carrying.

The present invention discloses a traditional Chinese medicine additive capable of improving the quality of boar semen. The additive comprises the following components, expressed by weight: 6 parts of Patchouli, 6 parts of dried tangerine peel, 8 parts of Elsholtzia ciliata, 6 parts of Artemisia annua, 4 parts of Glycyrrhiza uralensis, 6 parts of Perilla frutescens, 6 parts of Atractylodes macrocephala, 6 parts of Magnolia officinalis, 6 parts of Radix Rehmanniae, and 6 parts of Bamboo Leaf. Adding the additive to boar diets can alleviate sperm damage caused by heat stress in boars under high temperature and high humidity in summer, comprehensively improve boar semen quality, enhance boar fertility in summer, and thereby increase downstream production efficiency of pig farms.

The present application relates to a kind of full-automatic boar semen collection device and system, including prosthesis unit, vaginal unit, audio unit, collection unit and control unit. Wherein, prosthesis unit has inner cavity element;Vaginal unit is arranged at the tail of prosthesis unit;Audio unit is arranged at the head position of prosthesis unit, for simulating the sound that the sow handling estrus occurs;Collection unit is arranged in inner cavity element, for collecting the semen that flows from the end of vaginal element;Control unit is connected with vaginal unit, audio unit and collection unit communication respectively.Its advantages are that, through vaginal element simulation sow's real vaginal environment, additional operation difficulty of the whole semen collection process can be reduced;Semen of boar ejaculatory early stage and semen of ejaculatory middle and late stage can also be distinguished and collected, improve the quality of semen collection.

The utility model discloses a large-scale pig farm boar semen storage device facilitating sampling, and particularly relates to the technical field of large-scale pig farm boar semen storage devices, the large-scale pig farm boar semen storage device comprises a base, a storage box and a storage frame, the storage box is installed at the top end of the base, and the storage frame is movably installed in the storage box; and a test tube rack assembly is arranged on the outer side wall of the storage rack. Through the arrangement of the test tube sleeve, when the test tube is used, the test tube main body filled with the boar semen can be inserted into the inner side of the test tube sleeve to be placed, meanwhile, the fixing bolt on the outer side of the test tube sleeve can be tightened, the front end of the fixing bolt abuts against the surface of the test tube main body, and the test tube main body can be further fixed; and the test tube sleeves are movably mounted on the inner sides of the storage grooves, so that the test tube sleeves and the inserted test tubes can be directly subjected to swinging treatment by virtue of the test tube sleeves, and the use convenience of the boar semen storage device in the large-scale pig farm is realized.

The application provides a boar semen cryopreservation agent and an application method; the boar semen cryopreservation agent comprises alpha-amylase, and the content of the alpha-amylase is 10-1000 mu g / L. The application method of the cryopreservation agent is as follows: centrifuging the boar semen after collection and pretreatment, removing supernatant after centrifugation; adding a refrigerant, re-suspending the sperm, and then placing the sperm in a 4 DEG C refrigerator and standing for 3-4 hours; adding a freezing liquid and fully mixing; filling the semen into a thin tube at 4 DEG C, uniformly laying the thin tubes in a freezing rack, and then precooling on a liquid nitrogen surface and then placing in liquid nitrogen for freezing. The application has the advantages that: the overall components of the cryopreservation agent are simple, the cost is low, and the overall cost performance is high; due to the addition of alpha-amylase in the cryopreservation agent, the storage quality of the boar frozen semen can be significantly improved; and the activity, acrosome integrity, DNA integrity, mitochondrial activity and other physical and chemical properties of the boar frozen semen are effectively improved.

The invention discloses a long-distance transportation low-density boar semen diluent which comprises a basic component and a stabilizer, and the stabilizer is bovine serum albumin; the pH value of the boar semen diluent is 6.3-7.6, the osmotic pressure of the boar semen diluent is 280-370 mOsm, and the ionic strength of the boar semen diluent is 0.2-0.5 mol / L. According to the invention, bovine serum albumin is taken as a core stabilizer, physical and chemical balance is realized through accurate proportioning, and the problems of weak anti-vibration capability, insufficient component synergism and the like of the existing diluent are solved. Researches show that by applying the diluent, the adverse effect of long-distance transportation on the low-density semen of the pigs can be resisted, the survival ability and fertilization potential of the low-density semen after being transported for 24-48 hours can be effectively improved, and the diluent is simple and convenient in preparation and use steps, does not need professional equipment, is controllable in cost, is adaptive to large-scale breeding and transportation scenes, and is suitable for large-scale breeding and transportation. Furthermore, the cross-regional utilization efficiency of the semen of the excellent breeding boars can be improved, the breeding boar feeding cost is reduced, the transmission range of excellent genes is accelerated, and the method has great application value in large-scale live pig breeding.

The utility model relates to the technical field of semen storage, in particular to a boar semen constant-temperature storage device which comprises a constant-temperature box body, a box cover is rotatably connected to the top of the constant-temperature box body, a control panel is arranged on the side wall of the constant-temperature box body, sliding grooves are formed in the two sides of the inner wall of the constant-temperature box body, and sliding plates are slidably connected into the sliding grooves. A supporting plate is fixedly connected between the opposite faces of the sliding plates, a shaking mechanism used for shaking a test tube storing boar semen is arranged at the top of the supporting plate, and the shaking mechanism comprises supporting frames fixedly connected to the two sides of the top of the supporting plate. According to the method, accumulation of metabolic waste and gathering and adhesion of sperms in a standing state are effectively reduced, so that sperm decline is delayed, a more stable and more efficient condition is provided for long-term preservation of the boar semen, long-term high-quality semen preservation is facilitated, and the utilization rate and effectiveness of the semen are improved.

The invention relates to the technical field of animal breeding, in particular to a boar semen improved feed additive based on a herba epimedii compound as well as a preparation method and application of the boar semen improved feed additive. The improved feed additive is prepared from the following active ingredients in parts by weight: 15 to 35 parts of herba epimedii extract, 10 to 25 parts of radix salviae miltiorrhizae extract, 8 to 20 parts of radix rehmanniae extract, 5 to 15 parts of caulis sinomenii extract, 0.1 to 0.8 part of vitamin E and 0.05 to 0.2 part of organic zinc. According to the invention, multiple active ingredients such as the herba epimedii extract, the organic zinc, the radix salviae miltiorrhizae, the radix rehmanniae and the caulis sinomenii are systematically matched with a preferred carrier, so that multi-path synergy in the aspects of spermatogenesis promotion, oxidation resistance, inflammation resistance, endocrine regulation, preparation delivery and the like is realized, and the semen quality of boars is remarkably improved.

The utility model relates to a boar semen collection frame for live pig breeding. Comprising a base plate, a fake sow table and an auxiliary climbing mechanism. A height adjusting electric telescopic rod is arranged at the right end of the base plate, a fake sow table is arranged on a telescopic rod of the height adjusting electric telescopic rod, a front leg lapping rod capable of moving left and right is slidably installed on the fake sow table, and the front leg lapping rod is driven by a left-right adjusting electric telescopic rod arranged in the fake sow table to move; the base plate is provided with an auxiliary climbing mechanism located on the left side of the fake sow table. According to the artificial sow platform, boars can be helped to climb the artificial sow platform through the auxiliary climbing mechanism, meanwhile, the artificial sow platform can ascend and descend, the artificial sow platform can be suitable for boars of different sizes to use, meanwhile, the boars can climb at a short position, then the artificial sow platform is lifted to the designated height, workers can conveniently conduct semen collection work, and in addition, the artificial sow platform is convenient to use. The boars can be assisted to climb towards the right side of the fake sow table through the front leg lapping rods capable of moving left and right, and it is ensured that the boars can climb in place.

The utility model discloses a boar semen incubator, and relates to the technical field of semen storage. The boar semen incubator comprises a box body, a cover is movably installed on one side of the top of the box body through a hinge, an auxiliary fixing mechanism used for conducting auxiliary fixing on boar semen storage test tubes is fixedly installed on the top of the cover, and an extending protection mechanism is fixedly installed on one side of the bottom in the box body. The horizontal state of the device is monitored in real time through power-on operation of an inclination sensor, and when the inclination sensor monitors that the horizontal state of the device exceeds a preset value of the inclination sensor, the inclination sensor controls a first electromagnetic valve pipe to be powered on to be opened, so that high-pressure air in an air tank is conveyed into an air bag, and the air bag expands in volume; the outer side of the device can be protected through the air bag with the expanded volume, the effect of buffering the impact force generated by falling and toppling of the device is achieved, and the function of safety protection of the boar semen test tube is achieved.

The invention is suitable for the related field of pig breeding, and provides a device and method for prolonging the preservation time of pig semen and improving the sperm motility, and the device for prolonging the preservation time of the pig semen and improving the sperm motility comprises a filter cup, a primary microporous filter membrane, a drainage bag, a precipitation cup, a secondary microporous filter membrane module, a collection cup and an adjustable negative pressure electric aspirator, the bottom of the filter cup is connected with the precipitation cup, the secondary microporous filter membrane module is arranged at the bottom of the precipitation cup, the drainage bag is sleeved with a cup opening of the precipitation cup, the primary microporous filter membrane is arranged above the drainage bag, the precipitation cup is further provided with an air extraction opening and a flow guide opening, the air extraction opening is communicated with the collection cup through a connecting pipe, and the flow guide opening is communicated with the collection cup through a connecting pipe. According to the invention, through the bionic environment, gradient collection and nano protection liquid, the vitality of unqualified seminal fluid is greatly improved.

The invention belongs to the technical field of biology. The invention relates to an antioxidant composition, in particular to an antioxidant composition and application thereof in normal-temperature preservation of boar semen. Researches find that the activity of boar sperms in the normal-temperature preservation period can be effectively improved by independently adding lycopene or antioxidant SKQ1, the combined use effect of lycopene and antioxidant SKQ1 shows a synergistic effect, and when the boar sperms are preserved to the seventh day, the average sperm activity value exceeds 70%. In addition, through combined treatment, the integrity of sperm acrosome and plasma membrane is remarkably maintained, the antioxidant enzyme activity of sperms is improved, the active oxygen and malonaldehyde level are effectively reduced, meanwhile, the mitochondrial membrane potential and the adenosine triphosphate content are remarkably improved, and the expression level of sperm P-AMPK and Nrf2 protein is improved. In conclusion, the lycopene and the SKQ1 are combined for use, oxidative stress and energy metabolism are synergistically regulated and controlled, the quality and function stability of the boar sperms in the normal-temperature preservation process are remarkably improved, and the lycopene and the SKQ1 have good application value and application prospects.

The present invention provides a molecular marker identification method related to porcine sperm motility and its application, relating to the field of biotechnology. This application involves applying a substance that detects the SNP molecular marker rs3476761356 to the preparation of a product for predicting porcine sperm motility. The SNP molecular marker rs3476761356 is associated with porcine sperm motility, with the TA genotype being the dominant genotype. Selecting pigs with the TA heterozygous genotype for breeding can effectively improve porcine sperm motility and accelerate the genetic improvement of boar semen quality, providing important insights into pig performance evaluation and genetic breeding.

The invention relates to the technical field of boar breeding, and discloses a boar semen trait heat stress resistance evaluation method which comprises the following steps: step 1, acquiring historical boar semen phenotypic data and historical temperature and humidity data, and establishing a thermal index according to the historical temperature and humidity data; step 2, adopting a quantile regression method to carry out 5% quantile regression on the warming index according to the historical boar semen phenotype data, delimiting the warming index 72 as a heat stress critical point, and constructing a heat stress resistance reference model; according to the heat stress resistance reference model, constructing a heat stress resistance evaluation model; and step 3, inputting to-be-evaluated boar semen phenotypic data and the corresponding thermal index into the heat stress resistance evaluation model, and outputting a heat stress resistance index by the heat stress resistance evaluation model. According to the method, the breeding boars with high heritability and high heat stress resistance can be accurately bred. Meanwhile, the invention further provides a device for evaluating the heat stress resistance of the boar semen traits.

The invention relates to an additive of a diluent for preserving boar semen at 17 DEG C and an application method thereof. Myoinositol with the concentration of 1 mg / mL is added into a boar semen diluent, so that the activity and forward movement proportion of boar sperms under the preservation condition of 17 DEG C can be remarkably improved, and meanwhile, the lipid oxidation state and acrosome integrity of the boar sperms are not influenced. The method is easy and convenient to operate, low in cost, suitable for the large-scale pig farm artificial insemination technology and beneficial to prolonging the pig semen preservation time and improving the breeding efficiency.

The invention discloses an SNP molecular marker related to a semen quality trait gene GNAS, a primer pair and application of the SNP molecular marker and the primer pair, and relates to the technical field of pig molecular markers. The quality traits of the boar semen are semen volume, sperm density, effective sperm density, forward movement activity, sperm malformation rate and sperm motility traits; the molecular marker is located in the second intron of the pig GNAS gene, the nucleotide sequence of the molecular marker is shown as SEQ ID NO.1 in a sequence table, and g.277Ggt exists at the 277bp position of the sequence; and A basic group mutation. The invention also provides a primer pair for amplifying the molecular marker and a method for breeding pigs by using the molecular marker. The SNP molecular marker in the pig GNAS gene is found to be related to the sperm volume, sperm density, effective sperm density, forward movement activity, sperm malformation rate and sperm activity characters of pigs for the first time, so that the SNP molecular marker can be used for marker-assisted selective breeding of pigs, early screening of the quality characters of the sperm of the pigs is realized, and the screening method is simple and rapid.

The invention discloses a diluent for normal-temperature preservation of boar semen and a preservation method. Selenomethionine is selected as a protective agent in the diluent for preserving the boar semen at the normal temperature to improve the semen quality, the diluent for preserving the semen at the low temperature is a Modena basic diluent, and the addition amount of the selenomethionine in the diluent for preserving the semen at the normal temperature is 0.1-10 mg / L, preferably 1 mg / L. According to the invention, selenomethionine is added into the diluent for preserving the boar semen at normal temperature, so that the motility, motility rate, plasma membrane integrity rate and acrosome integrity rate of the boar semen can be remarkably improved. If the method is applied to actual production, the normal-temperature preservation time of the boar semen can be prolonged, the semen preservation quality is improved, and the production cost is reduced.

The utility model discloses boar semen split charging equipment, which relates to the technical field of breeding in the breeding industry and comprises a split charging platform, a split charging mechanism is fixedly mounted on the rear side of the split charging platform, a positioning mechanism is arranged at the top of the split charging platform, and the split charging mechanism comprises a fixed bottom plate. The fixed bottom plate is fixedly mounted on the rear side of the subpackaging platform, an electric push rod I is fixedly mounted at the top of the fixed bottom plate, a vertical plate is arranged on the front side of the electric push rod I, an infrared receiving sensor is fixedly mounted on the front side of the vertical plate, and a mounting platform is fixedly mounted at the top end of the electric push rod I; a semen mixture storage tank is fixedly mounted on the rear side of the top of the mounting platform. According to the boar semen subpackaging injection device, the rotating motor, the rotating disc, the first electric push rod and the injection mechanism are matched with one another, so that a plurality of semen bottles can be grouped for unified and rapid subpackaging injection work, and the boar semen subpackaging efficiency is effectively improved.

The application relates to an automatic boar semen collection device and system, which comprises a sow prosthesis, a bionic vagina, a sound simulation device, a cleaning device, a semen collection device and a control device. The bionic vagina is arranged at the tail of the sow prosthesis, and the tail end of the bionic vagina extends into a cavity. The sound simulation device is arranged at the head of the sow prosthesis and is used for simulating the sound generated by the sow during estrus. The cleaning device is arranged at the tail of the sow prosthesis and is used for flushing the penis of the boar. The semen collection device is arranged in the cavity and is used for collecting the semen flowing out of the tail end of the bionic vagina. The control device is in communication connection with the bionic vagina, the sound simulation device, the cleaning device and the semen collection device. The device has the advantages that the real vaginal environment of the sow can be simulated through the bionic vagina, the difficulty of the whole semen collection process can be reduced, and the semen in the initial ejaculation stage and the semen in the middle and later ejaculation stages of the boar can be collected separately, so that the quality of the semen collection is improved.

The invention relates to the technical field of livestock breeding, and discloses a novel pig semen cryopreservation technology and a special low-temperature protective agent thereof. The formula of the special low-temperature protective agent comprises the following components: basic liquid: glucose, sodium citrate, Tris, sodium bicarbonate, potassium chloride, a pullulan grafted manganese-based complex, taurine and deionized water; the antioxidant is prepared from vitamin E, glutathione, melatonin and a rosemary extract; the cryoprotectant comprises glycerol and dimethyl sulfoxide; nutritional additives: fresh egg yolk and trehalose; and antibiotics: penicillin sodium, streptomycin sulfate and lactoferrin. The cryopreservation technology comprises the following steps of semen collection and pretreatment, protective agent addition and balance, freezing and preservation, and unfreezing and insemination.

The present invention relates to the field of preparation of pig semen diluents, and specifically to a dilution mixing tank and an operation method for preparing pig semen diluents, including a throttling mechanism for throttling and conveying part of the diluent materials. The bottom of the throttling mechanism is fixedly connected to a mixing tank; a feeding mechanism for feeding the diluent; a stirring mechanism for stirring the diluent. The feeding mechanism is fixedly installed on the outside of the mixing tank, the outside of the feeding mechanism is fixedly connected to the throttling mechanism, and the stirring mechanism is fixedly installed inside the mixing tank. Among them, the stirring mechanism includes a support rod fixedly connected to the bottom of the mixing tank. The dilution mixing tank and the operation method for preparing pig semen diluents can, through the rotation of the first stirring blade and the second stirring blade, make the two play a role in synchronously stirring the upper and lower stratified spaces of the mixing tank respectively.

The present invention relates to the technical field of pig breeding, and specifically discloses a reverse hybridization breeding method for pigs, comprising the following steps: constructing a synthetic maternal S line: performing multivariate hybridization and breeding with two or more breeds such as Landrace, Large White, Duroc or local breeds to fix favorable genes; hybridizing S line sows with Landrace boars to obtain the F1 generation SL line; hybridizing SL line sows with Large White boars to obtain the parent generation SLY line. The present invention completely overturns the traditional hybridization and matching hybridization methods, can avoid the degeneration of pure breeding, and is the world's first hybridization breeding method without purebred sows, saving more than 15 billion in purebred costs nationwide. The various performances of sows are synergistically improved, the cost of commercial pigs is reduced by 100 yuan per head, and the meat quality is better. Pig farms do not need to introduce live sows, but only need to introduce boar semen to breed high-quality breeding pigs, which is very beneficial for the prevention and control of African swine fever and can easily solve the problem of blue ear and ring disease. Disease-resistant breeding is the trend in the future, and it is convenient to transmit disease-resistant genes through boars.

The invention discloses a semen diluent for improving the production efficiency of pig semen, which comprises a basic solution, a nutritional agent, a buffer agent and an electrolyte, and also comprises an antioxidant and a composite antibacterial agent, the nutritional agent is composed of glucose and fructose, the antioxidant is glutathione, and the composite antibacterial agent is composed of penicillin, streptomycin and gentamicin. Accordingly, a corresponding preparation method and a using method are also established. Researches show that the diluted boar semen can survive at 17 DEG C for more than or equal to 144 hours, the activity is more than or equal to 60%, 1 part of the original semen with the sperm density of 200 mL and the sperm density of 1 billion / mL can cover 40 sows, the utilization rate of the original semen is increased by 150%, the breeding cost is remarkably reduced, and the method is suitable for large-scale popularization.