A method for genetic screening evaluation in cattle breeding

Abstract

The application discloses a kind of cattle breeding genetic screening evaluation methods, it is related to cattle breeding technical field, comprising the following steps: according to character information, from cattle population, candidate breeding cattle is screened out, and constitute father group and mother group;Obtain the character information of individual cattle father and mother of multiple generations in candidate breeding cattle;According to the character information of multiple generations of father and mother, analyze the recessive trait that candidate breeding cattle can have and the probability of having the recessive trait, and determine the dominance and genetic probability of each character inheritance that are judged to have;Establish database record the dominant trait and recessive trait that candidate breeding cattle have and the recessive trait that can have, and record its genetic probability;Construct breeding score model.The cattle breeding genetic screening evaluation method, genetic screening evaluation is simpler, can automatically screen out optimal mating scheme, improve breeding efficiency and breeding quality;It can also avoid inbreeding simultaneously.

Description

Technical Field

[0001] This invention relates to the field of bovine breeding technology, specifically to a method for genetic screening and evaluation in bovine breeding. Background Technology

[0002] Cattle breeding is a fundamental task and an important link in livestock production. It is related to the prosperity and development of the cattle industry. Cattle breed selection is the process of consolidating and improving superior genes within the population, thereby creating individuals with superior production performance and expanding the number of excellent individuals. It is a variety of breeding activities centered around the breed, including breed selection, crossbreeding, introduction of new breeds, and preservation and utilization of breed resources.

[0003] Traditional cattle breeding programs typically select cattle with higher-than-expected positive traits for breeding, increasing the likelihood that offspring will possess the same positive traits. While these simple methods can be effective, the complexities of animal genetics often result in outcomes far from the expected ones. Furthermore, the pursuit of mating animals with identical positive traits leads to inbreeding problems.

[0004] Therefore, it is necessary to propose a genetic screening and evaluation method for cattle breeding to solve the above problems. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a simpler genetic screening and evaluation method for cattle breeding that can automatically identify the optimal mating scheme, improve breeding efficiency and quality, and avoid inbreeding, thereby solving the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a method for genetic screening and evaluation in bovine breeding, comprising the following steps:

[0009] Step 1: Based on trait information, select candidate breeding cattle from the herd and form paternal and maternal groups;

[0010] Step 2: Obtain phenotypic information of individual cattle in the paternal and maternal lines across multiple generations in the candidate breeding cattle;

[0011] Step 3: Based on the phenotypic information of the paternal and maternal lines over multiple generations, analyze the recessive traits that the candidate breeding cattle may possess and the probability of possessing such recessive traits, and determine the dominant and recessive nature and the probability of inheritance of each trait.

[0012] Step 4: Establish a database to record the dominant and recessive traits possessed by candidate breeding cattle, as well as the possible recessive traits, and record their inheritance probabilities.

[0013] Step 5: Construct a breeding scoring model, calculate the probability of each dominant trait in offspring produced by different paternal and maternal parent breeding, set scoring weights, and calculate the scores of offspring produced by different combinations of paternal and maternal parents.

[0014] Step 6: Select a high-scoring allocation scheme.

[0015] Furthermore, both dominant and recessive traits include high-value traits, low-value traits, and no-value traits.

[0016] Furthermore, the breeding scoring model is as follows:

[0017] The breeding scoring model is as follows:

[0018]

[0019] in, ;

[0020] W represents the rating of the cub. These represent the probabilities of high-value traits in the paternal and maternal parents, respectively. These represent the probabilities of low-value traits in the parent and mother plants, respectively. The probabilities of the parent and mother plants being of no value, respectively. and All are scoring weights.

[0021] Furthermore, the score of the offspring represents a relative score of the phenotypic information of the offspring bred from the combination of the father and mother.

[0022] Furthermore, the scoring weights are determined by the degree to which genetic traits affect the value of cattle.

[0023] (III) Beneficial Effects

[0024] Compared with existing technologies, this invention provides a method for genetic screening and evaluation in bovine breeding, which has the following beneficial effects:

[0025] This method for genetic screening and evaluation in cattle breeding involves selecting candidate breeding cattle with positive traits to form paternal and maternal groups. Based on the phenotypic information of multiple generations of paternal and maternal lines, the genetic probability of each trait is analyzed and input into a breeding scoring model. The scoring model calculates the scores of calves obtained from different breeding combinations and selects the optimal combination as the breeding plan. This method simplifies the genetic screening and evaluation of cattle breeding, improves breeding efficiency, and avoids inbreeding. Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] A method for evaluating genetic screening in bovine breeding includes the following steps:

[0028] Step 1: Select cattle with high trait information value from the herd as candidate breeding cattle and form sire and maternal groups.

[0029] Step 2: Obtain phenotypic information of multiple generations of paternal and maternal lines of individual cattle in the candidate breeding cattle; phenotypic information refers to the morphological characteristics and physiological properties of cattle during growth and development, including adult weight and body shape, temper, growth traits, disease resistance traits, reproductive traits, etc.

[0030] Step 3: Based on the phenotypic information of the paternal and maternal lines over multiple generations, analyze the recessive traits that the candidate breeding cattle may possess and the probability of possessing such recessive traits, and determine the dominant and recessive nature and probability of inheritance of each trait.

[0031] Step 4: Establish a database to record the dominant and recessive traits possessed by candidate breeding cattle, as well as the possible recessive traits, and record their inheritance probabilities.

[0032] At the same time, all dominant and recessive traits are classified into high-value traits, low-value traits, and no-value traits. High-value traits refer to traits that have a positive impact on the value of cattle, low-value traits refer to traits that have a small negative impact on the value of cattle, and no-value traits refer to negative traits that have a large impact on the value of cattle, as shown in the table below:

[0033]

[0034] In the table, This refers to the probability of the same heritable trait being inherited by the father and mother, respectively.

[0035] Step 5: Construct a breeding scoring model, calculate the probability of each dominant trait in offspring produced by different paternal and maternal lines, set scoring weights, and calculate the scores of calves produced by different paternal and maternal line combinations. Specifically, the scoring weights are determined by the degree of influence of genetic traits on cattle value. Cattle value includes six categories of indicators: growth and development, fattening, slaughter, carcass, meat quality, and reproduction. The greater the influence of genetic traits on cattle value, the greater the scoring weight, and vice versa, as shown in the table below:

[0036]

[0037] The breeding scoring model is as follows:

[0038]

[0039] in, ;

[0040] W represents the rating of the cub. These represent the probabilities of high-value traits in the paternal and maternal parents, respectively. These represent the probabilities of low-value traits in the parent and mother plants, respectively. The probabilities of the parent and mother plants being of no value, respectively. and All scores are weighted; the score of the offspring represents the relative score of the phenotypic information of the offspring bred from the combination of the father and mother.

[0041] Step 6: Select a high-scoring allocation scheme.

[0042] In addition, to avoid inbreeding, each paternal and maternal line in the database has a serial number composed of multiple generations of paternal and maternal line numbers (each cow has a different number). Before scoring through the breeding scoring model, breeding scores are not calculated for paternal and maternal lines with the same number.

[0043] For example, if the paternal parents are numbered 2 and 5, the paternal grandparents are numbered 8 and 9, and the maternal grandparents are numbered 15 and 16, then the paternal parent number is (2, 5; 8, 9; 15, 16)Y. If the maternal parents are numbered 6 and 10, the paternal grandparents are numbered 45 and 42, and the maternal grandparents are numbered 18 and 16, then the paternal parent number is (6, 10; 45, 42; 18, 16)X. Since (2, 5; 8, 9; 15, 16)Y and (6, 10; 45, 42; 18, 16)X contain the number 16, neither the paternal nor maternal parent will be included in the breeding score calculation, and neither will be used for breeding. This is to avoid inbreeding and reduce the overall calculation workload.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for evaluating genetic screening in bovine breeding, characterized in that: Includes the following steps: Step 1: Based on trait information, select candidate breeding cattle from the herd and form paternal and maternal groups; Step 2: Obtain phenotypic information of individual cattle in the paternal and maternal lines across multiple generations in the candidate breeding cattle; Step 3: Based on the phenotypic information of the paternal and maternal lines over multiple generations, analyze the recessive traits that the candidate breeding cattle may possess and the probability of possessing such recessive traits, and determine the dominant and recessive nature and the probability of inheritance of each trait. Step 4: Establish a database to record the dominant and recessive traits of candidate breeding cattle, as well as the possible recessive traits, and record their inheritance probability. Dominant and recessive traits include high-value traits, low-value traits, and no-value traits. Step 5: Construct a breeding scoring model, calculate the probability of each dominant trait in offspring produced by different paternal and maternal parent breeding, set scoring weights, and calculate the scores of offspring produced by different combinations of paternal and maternal parents. The breeding scoring model is as follows: in, ; W represents the rating of the cub. These represent the probabilities of high-value traits in the paternal and maternal parents, respectively. These represent the probabilities of low-value traits in the parent and mother plants, respectively. The probabilities of the parent and mother plants being of no value, respectively. and All are scoring weights; Step 6: Select a high-scoring allocation scheme.

2. The method for evaluating bovine breeding genetic screening according to claim 1, characterized in that: The score of the offspring represents a relative score of the phenotypic information of the offspring bred from the combination of the father and mother.

3. The method for evaluating bovine breeding genetic screening according to claim 1, characterized in that: The scoring weights are determined by the degree to which genetic traits affect the value of cattle.

4. The method for evaluating bovine breeding genetic screening according to claim 1, characterized in that: Each parent in the database has a serial number consisting of multiple generations of paternal and maternal lineages. This serial number is used to screen for closely related parents.

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