120 results about "Inbreeding" patented technology

The invention discloses a method for breeding a new golden-shell crassostrea gigas strain. The method is characterized by including the operating steps of (1) breeding the first generation: selecting wild parent crassostrea gigas with golden left shells, and creating a plurality of families without genetic relationships; (2) breeding the second generation: selecting the families with the obvious golden-shell characters from the created first-generation families, and screening out the crassostrea gigas with the golden left shells and the golden right shells to carry out inner-family inbreeding; (3) breeding the third generation: carrying out inter-family hybridization on the families, with the left shells and the right shells being in the golden characters, obtained from the created second-generation families; (4) breeding the fourth generation: carrying out stability verification on the families with the left shells and the right shells being in the golden characters. According to the method, the breeding process of the new crassostrea gigas shell-color strain is accelerated, and new products of bred shellfishes are increased; the product additional value is increased through the color characters, the breeding yield is improved through the growth characters, incomes of breeding enterprises and farmers are increased, and the market prospects are broad.

A breeding method for the new variety of the carp relates to a breeding method of a new variety of the fish, which resolves the problems of the prior group breeding method for the culture and the cultivation of the carp that is easy to have the inbreeding, which leads to the decrease of the economic character and the production performance; the intraspecific hybridization method has great randomness, the probability for breeding an excellent variety is low and is easy to have the inbreeding. The breeding procedures are: 1. performing the phenotypic character selection; 2. detecting the genetic information of the parent strain; 3. performing the reproduction grouping according to the genetic information; 4. cultivating the filial generation to be matured; 5. adopting the offspring carp as the new generation of the breeding parent strain and repeating the operation procedures from 1 to 4 until the carp meets the character design requirements of the new variety. The present invention always uses the molecular marker to detect the genetic composition of the parent strain and the filial generation in the selection process of the new carp variety, thereby avoiding the inbreeding; moreover the character of the new variety of the carp is developed in the designed direction, the emergence probability of the excellent new variety is high; therefore, the economic character and the production performance of the carps are obviously improved.

The invention discloses a cement pit breeding method of langoustine, comprising the steps of seed selection, mating, hatching, juvenile langoustine breeding and langoustine seed catching. According to the invention, the seed selection standard of the parent langoustine is strict, and the old, weak, sick and disable parent langoustine are sifted out, thereby laying foundation for breeding health juvenile langoustine with high quality; since the parent langoustine used for breeding is different in resource, inbreeding is avoided, and the quality of the juvenile langoustine is ensured; oogenesis parent langoustine refers to oogenesis parent langoustine laying egg in the same period, the yield is high and the langoustine seeds are kept consistent in size; the disease resistance of the langoustine seed is strong, the loss of langoustine workers is reduced, and the cultivation benefit is increased; furthermore, according to the invention, parent langoustine transfer is simple and convenient, the langoustine seed catching is simple and feasible, and the labor intensity is greatly reduced.

The invention discloses a chicken preserved population individual apolegamy optimizing method. Blood DNA of chicken preserved population breed reserving cock and hen individuals is extracted, sequencing is carried out through a reduced genomic sequencing technology, and the sequence is compared with a sequence of the GenBank database reference chicken breed to find SNP loci existing in different individuals. The individual own inbreeding coefficient and the interindividual phylogenetic relationship coefficient are calculated through gene frequency and genotype frequency of the SNP loci, individual apolegamy is optimized according to the statistics value, mating combination of individuals with an overlarge inbreeding coefficient and individuals with an overlarge within-family phylogenetic relationship coefficient is avoided, and the purposes of reducing the preserved population inbreeding level and maintaining the genetic diversity total quantity steady state are achieved. By means of the method, the problem that fine individual apolegamy cannot be carried out depending on genealogy information in the chicken breed resource protection process can be effectively solved, the preserved population inbreeding level can be effectively reduced, the genetic diversity steady state is maintained, and the breed preservation effect and efficiency are improved.

The invention provides a test case generation method based on a hierarchic genetic algorithm. The method can be used for effectively preventing and controlling inbreeding, so that the problems of premature convergence and local convergence are effectively solved. The method includes the steps that a program source code is inputted into a path analyzer, and the path analyzer carries out path analysis on the inputted program source code, then obtains a corresponding path list and outputs the path list to a test data generator; a predicate instrumenter carries out predicate instrumentation on the inputted source code and outputs the instrumented code to the test data generator; the test data generator firstly carries out hierarchy on an initial population through the hierarchic genetic algorithm, compares passing paths of individuals in hierarchies with objective paths of the individuals in the hierarchies through the utilization of the instrumented source code to obtain the matching values between the passing paths and the objective paths, and finally the test data generator gives test cases to the paths.

The invention belongs to the technical field of breeding of vegetable crops, and discloses a selective breeding method of a male sterile line of Capsicum annuum var.frutescens L.. The selective breeding comprises the following steps: using an own common pepper maintenance line material as a female parent, selecting a single plant having a target character as a male parent from introduced three-line hybrid separation offspring having the target character and carrying out hybridization, and then carrying out inbreeding on the offspring to obtain hybridized F2; performing offspring fertility identification on a pre-selected maintenance line material (F2), selecting a plant line sterile plant of which a sterile plant ratio is 100 percent as the female parent, and using the single plant havingthe target character in the corresponding male parent plant line as the male parent and carrying out single-plant paired backcross, and simultaneously carrying out male parent inbreeding; carrying outbackcross and transformed breeding on the sterile line by utilizing a nuclear substitutional technology. The selective breeding method of the male sterile line of the Capsicum annuum var.frutescens L. disclosed by the invention is strong in complementarity of the characters and is wide in selection ranges; materials are easy to get, and the utilization rate of variety resources is improved; the method is simple, the controllability is strong and the reproduction rate is high; the bred sterile line is good in stability, high in combining ability, and is insensitive to temperature and illumination; moreover, the sterile plant rate and the sterility degree are both up to 100 percent.

The invention relates to a water bird individual breeding method, which is characterized in that a bird house is divided into a plurality of independent small pens, each small pen comprises an inside playground and an outside playground, a plurality of egg laying nests are arranged inside the poultry house, the outside playground is divided into a continental playground and a water playground, and one male bird and a plurality of female birds are raised in each small pen; the female birds in the small pen are marked in a painting way in different colors, egg touching is carried out for each female bird before laying the egg every day, the female bird with the egg is closed into the corresponding egg laying nest and released after the egg laying, a number and a date of the female bird and the corresponding male bird are marked on each egg, all eggs laid by the same female bird are hatched together, and the fertility rate and hatching rate of each female bird are counted. Due to the adoption of the method, the egg laying situation of each female bird can be accurately recorded, father and mother of each young bird can be accurately recorded, the inbreeding can be effectively avoided, the breeding of the individual water bird can be reasonably optimized, the breeding purpose can be realized, and the water bird breeding quality and yield can be improved.