32results about How to "Improve seed selection efficiency" patented technology

The invention discloses a breeding method capable of improving the egg yield of muscovy ducks. The breeding method comprises the following steps of early-stage primary election, wherein a high-qualitypopulation are selected in young ducks according to the body-size healthy and strong degree in proportion; first-time egg laying selection, wherein according to the whole-period egg production numberof the previous generation and family information, the breeding values of individuals in the current generation are calculated, and high-egg-yield and high-breeding-value male and female ducks are selected and remain in proportion; egg production determination, wherein when the female ducks start laying, the number of the qualified eggs laid by each female duck individual is recorded; second-timeegg laying selection, wherein according to the egg yield of the female ducks in the current generation and the genealogy information, high-egg-yield and high-breeding-value male ducks and female ducks are selected and remain in proportion; family building, a full-sib family is built by the male ducks and the female ducks in proportion, the next generation is bred, and the above steps are repeated. The breeding method has the advantages that the contradictions between subculture and egg laying selection are well solved, genetic contributions on the egg yield in the later egg laying period aretaken into account, the breeding efficiency is improved, and improvement of economic benefits is facilitated.

The invention aims to provide a molecular marker relevant to growth of fenneropenaeus chinensis and an application of the molecular marker. The molecular marker is a SNP (Single Nucleotide Polymorphism) locus in a FaMeT gene of the fenneropenaeus chinensis, which is relevant to the growth trait of the fenneropenaeus chinensis. The SNP locus is the 364th site of the FaMeT gene with a nucleotide sequence shown in SEQ ID NO:1, wherein the basic group of the SNP locus is G or T. The SNP locus is obtained by screening the GG-type fenneropenaeus chinensis; the weight and the head cuirass width of the SNP locus are both higher than those of a GT genotype individual. Thus, the GG-type individual can be preferentially selected as a breeding parent according to the SNP locus during the growth breeding selection process of the fenneropenaeus chinensis, thereby improving the efficiency of breeding selection.

The invention discloses a novel agricultural seed selection device improving the seed selection quality. The novel agricultural seed selection device improving the seed selection quality comprises a seed selection device body; an air blower is installed above the left side in the seed selection device body and electrically connected with a control device through a wire; a first screening bin is arranged on the upper portion in the seed selection device body; a first discharging port is formed in the right end of the first screening bin; a second screening bin is arranged on the lower portion in the seed selection device body; a second discharging port is formed in the right end of the second screening bin; a screening device is installed between the first screening bin and the second screening bin; a feeding port is formed in the middle of the upper portion of the seed selection device body; and an electromagnetic mass sensor is installed below the feeding port. The novel agricultural seed selection device improving the seed selection quality has the beneficial effects of being reasonable in structural design, easy to operate, high in seed selection quality, safe, practical and the like; and meanwhile, the seed selection rate can be substantially increased, and the novel agricultural seed selection device improving the seed selection quality can be widely used and popularized.

The invention relates to the cloning of a transforming growth factor-beta (TGF-beta) superfamily type I receptor gene Tgfbrl1 of chlamys farreri in a molecular genetic marker technology, a screening and typing technology of a single nucleotide polymorphism (SNP) locus which is relevant with the weight of adductor muscles in the gene and a method for the application of the gene to the breeding of the high-yield chlamys farreri. A total-length complementary deoxyribonucleic acid (cDNA) sequence of the Tgfbr1 gene of the chlamys farreri is obtained by utilizing a homology-based cloning strategy; an SNP lotus is discovered by blastn comparison, and primers and a probe are designed for the locus; and SNP typing is performed in a natural population of the chlamys farreri by using a high-resolution melting curve technology, and the weight of the adductor muscle of an individual is measured. Statistic analysis displays that the loci c.1815C>T are obviously relevant with the weight of the adductor muscles of the chlamys farreri, and the weight of the adductor muscles of individuals with TT genetypes is obviously higher than that of the adductor muscles of individuals with CC and CT genetypes. In the selective breeding process of the high-yield chlamys farreri, the breeding candidate colonies of the chlamys farreri can be subjected to c.1815C>T typing, and the individuals of which the loci c.1815C>T are TT genetypes are used as a breeding parent preferably by combining typing information of other loci which are relevant with growth properties.

The invention discloses a seed selection device and method for leafy vegetables in hot season shortage periods and belongs to the technical field of leafy vegetable seed selection in hot season shortage periods. The device comprises a seed selection box, a driving mechanism is arranged on the inner side of the lower end of the seed selection box; the driving mechanism comprises a first driving motor, a cam, a pulley, a mounting base, a push rod, a telescopic spring and a positioning plate, one end of the push rod penetrates through the positioning plate and a collecting tank which are arrangedfrom bottom to top to be mounted on a filter screen, a drainage pipe is arranged at the lower end of the collecting tank, and one end of the drainage pipe is located above an oval screening barrel. According to the invention, the driving mechanism continuously shakes the filter screen; the seeds can pass through the filter screen and fall into the collecting tank; the seeds enter the oval screening barrel through a second feeding port, the oval screening barrel rotates to enable the seeds to continuously roll over, the unqualified small seeds fall into a collecting box through the screening holes, the qualified seeds are left in the oval screening barrel, manual intervention is not needed in the whole operation process, the labor intensity is low, and the seed selection efficiency is high.

The invention relates to a synthetic-line selection-breeding method by utilizing a pig mark to assist the selection, which comprises the steps that: agnate and maternal are firstly bred, then the patriline is mated with the maternal to obtain piglets, and is characterized in that: American large white and PIC337 pig are used as breeding materials of the agnate, boar produced by PIC1050*PIC1075 and Campbell sow are used as breeding materials of maternal, conventional genetic evaluation on all sows are carried out according to the present record so as to select excellent sows; mark genotype of each gene such as ESR, FSHbeta, IGF2, H-FABP, MC4R and the like of the selected excellent sows and all boars is detected; F1 basic group is selectively mated according to the mark genotype; and the F1 basic groups are mated with each other to form an F2 basic group to form a final basic group. The method has advantages that: due to the adoption of the above method, piglets with fast growth speed, good conversion efficiency of feed, good meat factor, good breeding capacity, good meat quality and excellent immunity can be bred.

An apple seed selection method based on bud mutation comprises the following steps: judging whether a discovered suspected bud mutation sample is a bud mutation sample or a modification sample by an SSAP molecular identification method; performing the bud mutation resource propagation of the bud mutation sample to obtain a strain; and evaluating the fruit quality and economic characters of the strain to judge whether the bud mutation sample belongs to a new variety. According to the method, whether the suspected bud mutation sample is the bud mutation sample or the modification sample is judged directly by analyzing the suspected bud mutation apple sample by the SSAP molecular identification method, but is not judged by planting and grafting, so that the breeding cycle of apple seed selection is shortened, and the accuracy of apple seed selection is increased.

The present invention discloses a breeding method of a high-yield egg amount sesame duck. The method comprises the steps of: selecting a sesame newly-hatched duckling to perform cultivation, selectinga first-generation sesame drake male parent and a first-generation sesame female duck female parent meeting the requirements to perform mixed free ranging and hybridization to obtain a second-generation sesame duck, establishing a second-generation sesame duck family, performing free ranging of the second-generation sesame ducks to breed the next generation to obtain a third-generation sesame ducks, and selecting female ducks and drakes with high yield eggs to establish a family according to a ratio of 3:1; and repeatedly performing the steps mentioned above. The method performs breeding of the sesame ducks, the laying starting age, the egg laying duration and the egg laying amount of the sesame ducks are obviously genetically improved, the laying starting time is short, the egg production period is long, the breeding method of the high-yield egg amount sesame duck can facilitate improvement of the nascent breeding rate of survival, is high in family hereditary stability, is simple inoperation, improves the newly-hatched duckling selection efficiency, improves the economic benefit, maintains the special features of the original sesame duck varieties, performs improvement of the breeding and obtains the sesame ducks with higher quality and high egg production.

The invention discloses a SNP marking detection associated with growth trait of haliotis diversicolor and an application. The molecular marker is gene sequence shown as SEQ ID NO.1. The invention further discloses a primer AMY-FP and a primer AMY-EP for detecting the molecular marker; the primer AMY-FP is the sequence shown as SEQ ID NO.2, and the primer AMY-RP is the sequence shown as SEQ ID NO.3. The SNP site obtained through molecular marking, primer, and selection is applied to the selection and breeding of haliotis diversicolor. A parent is selected by using the primer and the method; the growth rate of the later breeding generations is obviously higher than the unselected control group; the molecular marker and the primer can efficiently, rapidly and simply be applied to the selection and breeding of haliotis diversicolor.

The invention discloses corn seed selection and seed dressing equipment. The corn seed selection and seed dressing equipment comprises a blanking system, a light inspection system, a screening system,a moving system, a spraying system, a drying system, a coating system and a solid seed dressing system; according to the equipment, damage to corn seeds is extremely small in the seed selection working process, the phenomenon of seed coat damage is avoided, the raw material loss rate is low, the seed selection effect is good, and the seed selection efficiency is greatly improved. The equipment can detect whether the outer layer structure of corn seeds is damaged or not and can also detect and identify the color and the overall fullness degree of the seeds, so that whether the seeds have diseases or not is effectively detected, the equipment can achieve two times of seed dressing processes of the corn seeds, the seed dressing effect is uniform, the use effect of the seed material after seed dressing is good, the burden that farmers need to carry out secondary seed dressing is eliminated, and the adverse consequences caused by the fact that the farmers do not reach the standard in selfseed dressing operation are effectively prevented.

The invention discloses a sugarcane seed selection tool. The sugarcane seed selection tool comprises an annular cutter and a telescopic rod with a telescopic function. The two ends of the annular cutter are turned upwards to form two blades, the two blades are bent outwards from one side of the telescopic rod to form a semicircular shape, cutter edges are formed on the lower sides of the blades, and the middle of the annular cutter is installed on the telescopic rod. The sugarcane seed selection tool has the advantages that the annular cutter is safe and reliable, operation is easy, the leaf peeling effect is good, a large amount of labor is saved, and the seed selection efficiency is improved; and the sugarcane seed selection tool can be used for multiple functions, the height of a sugarcane plant can be measured, the length between sugarcane sections can further be measured, photographing is visual, the sugarcane seed selection tool can be operated by one person, can be folded when not in use, and is convenient to carry.

The invention discloses a method for detecting color characters of rape flowers. The method comprises the following steps: (1) taking rape leaves, extracting DNA, and amplifying a BnaA03g45610D sequence of an LDOX/ANS gene by using amplification primers; and (2) performing sequencing analysis on an amplification product. According to the result of sequencing analysis, rapes with red flowers, orange flowers, yellowish brown flowers, yellow flowers and white flowers can be completely distinguished, and the method has an important practical value for improving seed selection efficiency and savingbreeding cost.