Breeding method of new meat rabbit strain

Abstract

The invention discloses a breeding method of a new meat rabbit strain, which comprises the following steps: establishing a hybrid group by using screened Ira rabbits and Belgian rabbits, hybridizing by using the Ira rabbits as female parents and Belgian rabbits as male parents to obtain Fa-substituted Ira rabbits, and then screening for multiple times and combining methods including backcross, near-crossing and cross-crossing fixation to obtain the new meat rabbit strain. And finally obtaining a target strain. The defects that existing Ira rabbits are relatively low in lactation performance, low in growth speed, not resistant to crude feed and the like are effectively overcome, and the new-variety meat rabbits obtained through breeding are high in stress resistance, disease resistance and crude feed resistance, good in meat quality and high in meat production rate and further have the advantages of being more robust in physique, high in reproduction rate, rapid in growth and development and high in lactation performance. In conclusion, the new variety of meat rabbits obtained through breeding has the advantages of being more excellent in production performance, stable in hereditary performance and the like, and therefore good economic benefits and social benefits can be brought to the meat rabbit industry.

Description

Technical Field

[0001] The invention belongs to the technical field of rabbit breeding, and in particular relates to a breeding method for a new breed of meat rabbits by improving the Yila meat rabbits of Pu'an County, Guizhou Province. Background Art

[0002] In today's global food industry, meat rabbits are an important source of meat, and their breeding and breeding technology has received widespread attention. With its advantages of fast growth, high reproduction rate, and low feeding cost, meat rabbits have become an important part of agricultural development in many countries and regions. However, traditional meat rabbit breeds often have some limitations, such as slow growth, weak disease resistance, and poor meat quality. These problems limit the further development and market competitiveness of the meat rabbit industry.

[0003] Pu'an County, Guizhou Province is a region with rich agricultural resources, and meat rabbit breeding occupies a place in the local agricultural economy. However, due to the long-term self-breeding and self-raising of Ila meat rabbits in Pu'an County without systematic breeding, the production performance has seriously deteriorated, mainly manifested in low lactation performance, low conception rate, survival rate, reproduction rate, slow growth, and large individual differences.

[0004] In order to solve these problems and improve the production performance and market competitiveness of meat rabbits, it is necessary to introduce modern breeding technology to improve and optimize the existing meat rabbit varieties. Through scientific breeding methods, new meat rabbit varieties can be cultivated. These new varieties should have stronger resistance to stress, higher disease resistance, better tolerance to roughage, better meat quality and higher meat yield. Summary of the invention

[0005] The purpose of the present invention is to provide a breeding method for a new breed of meat rabbits, which effectively solves the disadvantages of low lactation performance, low conception rate, survival rate, reproduction rate, slow growth, etc. of Ira rabbits in the development of the meat rabbit industry in Pu'an County, Guizhou Province. By utilizing animal genetic breeding methods, breeding new meat rabbit varieties can achieve the goal of increasing production and income, and create better economic and social benefits.

[0006] The present invention is achieved in that:

[0007] A method for breeding a new breed of meat rabbits, comprising forming a hybrid group of Ira rabbits and Belgian rabbits that have been identified, evaluated and screened, and hybridizing with Ira rabbits as females and Belgian rabbits as males to obtain Fa generation Ira rabbits, and then screening multiple times and combining methods including backcrossing, close hybridization and cross-crossing fixation to finally obtain a target breed.

[0008] In the present invention, a well-designed hybridization strategy is combined with backcrossing, close hybridization and cross-crossing fixation to achieve the improvement and optimization of specific traits of meat rabbits. The technical principle of this method is based on animal genetics and breeding. By selecting Ira rabbits and Belgian rabbits with excellent genetic backgrounds as parents and utilizing their complementary advantages, a new breed of meat rabbits with new genetic combinations and better production performance is cultivated.

[0009] As a further preferred solution, in the first backcross, the Fa generation Ibe rabbit is used as the female parent, and the Belgian rabbit domesticated locally in Pu'an County, Guizhou Province is used as the male parent to obtain the Fb generation backcross offspring.

[0010] In the above scheme, the Fa generation Ibe rabbits are backcrossed with Belgian rabbits domesticated in Pu'an County, Guizhou Province. This step aims to strengthen the expression of the excellent traits of the paternal Belgian rabbits in the offspring. Backcrossing is an effective breeding method that can increase the frequency of specific excellent genes in the offspring, thereby improving the genetic quality of the entire group. In this way, economic traits such as growth rate, meat quality, and fertility can be strengthened, laying a solid foundation for subsequent breeding work.

[0011] As a further preferred solution, after obtaining the Fb generation backcross offspring, the obtained Fb generation backcross offspring excellent male rabbit is used as the father and the obtained Fb generation backcross offspring excellent female rabbit is used as the mother to perform cross-crossing to obtain Fc cross-cross offspring.

[0012] In the above scheme, the Fc generation cross-cross offspring is produced by cross-crossing, that is, selecting excellent male and female rabbits from the Fb generation backcross offspring for mating. Cross-crossing helps to fix and purify the genetic background, reduce the genetic diversity within the group, and screen out individuals with better traits. The effect of this step is to improve breeding efficiency, accelerate the stability of new varieties, and lay the foundation for subsequent close hybridization and cross-crossing fixation, thereby gradually realizing the precise improvement of new meat rabbit strains. In this way, the required production traits can be effectively concentrated and strengthened, providing technical guarantees for the final cultivation of new meat rabbit strains with specific production performance.

[0013] As a further preferred solution, the excellent male rabbit of the Fb generation is used as the male parent and the excellent female rabbit of the Fc generation is used as the female parent to carry out close hybridization to screen out the excellent breeding group of the Fbc generation; the excellent male rabbit of the Fc generation is used as the male parent and the excellent female rabbit of the hybrid offspring of the Fb generation is used as the female parent to carry out close hybridization to screen out the excellent breeding group of the Fcb generation.

[0014] In the above scheme, breeding groups with specific excellent traits are screened out through close hybridization. Close hybridization refers to mating between individuals with a kinship relationship. This method can strengthen the combination of excellent genes and reduce the expression of undesirable genes. In this process, by screening out Fbc generation breeding groups with strong stress resistance and adaptability, and Fcb generation breeding groups with high breeding survival rate, strong stress resistance and adaptability, it can be ensured that the new varieties have better survival and production capabilities in the changing breeding environment and market demand. The effect of this step is to enhance the adaptability and disease resistance of the entire rabbit population to environmental changes, while maintaining or improving reproductive efficiency.

[0015] As a further preferred solution, the excellent male rabbit of the Fbc generation is used as the male parent and the excellent female rabbit of the Fcb generation is used as the female parent for close hybridization to screen out the excellent breeding group of the Fb1c1 generation; the excellent male rabbit of the Fcb generation is used as the male parent and the excellent female rabbit of the Fbc generation is used as the female parent for hybridization to screen out the excellent breeding group of the Fc1b1 generation.

[0016] In the above scheme, the excellent individuals of the Fbc generation and the Fcb generation are hybridized in order to combine the superior genes of the two generations and produce a Fb1c1 generation breeding group with larger individuals, rapid growth, good stress resistance and adaptability. At the same time, the hybridization of the Fcb generation and the Fbc generation is to screen out the Fc1b1 generation breeding group with comprehensive excellent traits, including strong individuals, rapid growth and development, good stress resistance and lactation performance. These screening criteria are directly related to the commercial value and breeding benefits of meat rabbits. Through these screenings, it can be ensured that the new varieties have higher productivity and better breeding returns in actual breeding.

[0017] As a further preferred scheme, the obtained Fb1c1 generation excellent male rabbit is used as the male parent and the obtained Fc1b1 generation excellent female rabbit is used as the female parent for hybridization to screen out the Fb2c2 generation excellent breeding group; the obtained Fc1b1 generation excellent male rabbit is used as the male parent and the obtained Fb1c1 generation excellent female rabbit is used as the female parent for hybridization to screen out the Fc2b2 generation excellent breeding group.

[0018] In the above scheme, the hybridization between Fb1c1 generation and Fc1b1 generation, and the hybridization between Fc2b2 generation and Fb2c2 generation, is to further consolidate and enhance the aforementioned excellent traits. Through these hybridization steps, offspring with better genetic characteristics can continue to be screened, such as larger individuals, faster growth rates, stronger stress resistance and adaptability, and better lactation performance. This process helps to fix and optimize the genetic background of the new variety, so that it can more stably express the desired production traits, laying the foundation for the ultimate formation of a new breed of meat rabbits with market competitiveness. The effect of these steps is to improve the production efficiency and economic value of the entire rabbit population, while ensuring that the new variety can meet the high standards of the modern meat rabbit breeding industry.

[0019] As a further preferred scheme, the excellent male rabbit of the Fb2c2 generation is used as the male parent and the excellent female rabbit of the Fc2b2 generation is used as the female parent to obtain the Fb3c3 excellent breeding group, and the excellent male and female rabbit breeding groups are selected from Fb3c3 for cross-crossing and fixation; the excellent male rabbit of the Fc2b2 generation is used as the male parent and the excellent female rabbit of the Fb2c2 generation is used as the female parent to obtain the Fc3b3 excellent breeding group, and the excellent male and female rabbit breeding groups are selected from Fc3b3 for cross-crossing and fixation.

[0020] In the above scheme, the excellent breeding groups of Fb3c3 and Fc3b3 are obtained by hybridization, and excellent male and female rabbits are selected from these groups for cross-crossing fixation. Cross-crossing fixation is a breeding technology that aims to increase the genetic diversity of the group through random mating, while stabilizing and fixing the selected excellent traits. The technical principle of this step is to screen out offspring with lower production performance through multiple generations of random mating, reduce the negative impact of inbreeding, maintain the genetic diversity of the group, and ensure the genetic health and stability of production performance of the new variety. The effect is to form a new breed of meat rabbits with a richer genetic background, more outstanding production performance and more stable traits, providing a solid foundation for subsequent commercial breeding and market promotion.

[0021] As a further preferred scheme, the screening indicators of the Fbc generation excellent breeding group include stress resistance and adaptability; the screening indicators of the Fcb generation excellent breeding group include reproduction survival rate, stress resistance and adaptability; the screening indicators of the Fb1c1 generation excellent breeding group include individual size, growth rate, stress resistance and adaptability; the screening indicators of the Fc1b1 generation excellent breeding group include individual robustness, individual size, growth and development rate, stress resistance, adaptability and lactation performance; the screening indicators of the Fb2c2 generation excellent breeding group include individual robustness, individual size, growth and development rate, stress resistance, adaptability and lactation performance; the screening indicators of the Fc2b2 generation excellent breeding group include individual robustness, individual size, growth and development rate, stress resistance and adaptability.

[0022] These indicators include stress resistance, adaptability, reproduction and litter survival rate, individual size, growth rate, lactation performance, etc., which are key factors in measuring the economic value and breeding efficiency of meat rabbits. By setting these screening indicators, breeding methods can improve the production performance of meat rabbits in a more targeted manner and ensure that new varieties can adapt to changing breeding environments and market demands.

[0023] As a further optimization scheme, the offspring of the Fb3c3 excellent breeding group and the Fc3b3 excellent breeding group are cross-crossed and fixed multiple times to screen out the basic core group for breeding of new meat rabbit varieties. The screening indicators include individual size, growth and development rate, reproduction rate, stress resistance, adaptability and lactation performance.

[0024] The process of selecting the core breeding group of new meat rabbit varieties through multiple screening of cross-cross fixed offspring. The principle is to gradually eliminate individuals that do not meet the breeding goals through continuous selection and evaluation, and finally form a core breeding group with consistent excellent traits. The effect of this process is to ensure the genetic stability and consistency of production performance of the new variety, laying a solid foundation for the large-scale promotion and application of the new variety.

[0025] In the present invention, the Ira rabbit is a domesticated Ira rabbit in Pu'an County, Guizhou Province, and the Belgian rabbit is a domesticated Belgian rabbit in Pu'an County, Guizhou Province. The Ira rabbit and Belgian rabbit used in the present invention to breed new meat rabbit strains adopt a specific source, that is, the breeds domesticated in Pu'an County, Guizhou Province. This requirement is to utilize the adaptability and genetic characteristics formed during the domestication process in a specific area to enhance the adaptability of the new breed to the local environment. The effect is to breed a new meat rabbit strain that has both excellent production performance and can adapt to local breeding conditions, which is of great significance for improving the overall competitiveness and sustainable development of the local meat rabbit breeding industry.

[0026] Compared with the prior art, the Belgian male rabbit introduced in the present invention is an excellent meat rabbit improved from wild burrowing rabbits originating in the Belgian area of ​​Beveren, Belgium, and was introduced into my country in the late 1970s. After the Belgian rabbit was introduced into my country, it developed in Jilin, Shandong, Gansu, Sichuan, Yunnan, Guizhou and other regions. The Belgian rabbits domesticated locally in Pu'an County, Guizhou Province originated from the Belgian rabbits developed in Guizhou Province. After a long period of selection, improvement and domestication, they became a local rabbit breed in Pu'an County. This rabbit has good lactation performance, tender meat, fast growth and development, strong physique, strong adaptability, tolerance to rough feed and the like, and has good production performance.

[0027] The domesticated Ira rabbits in Pu'an County, Guizhou Province originated from Shandong Province and Sichuan Province in my country. In May 2000 and June 2006, the A and B Ira meat rabbits of the four-line matching system were introduced twice. After being domesticated in Pu'an County, Guizhou Province, the local rabbits adapted to the local climatic conditions are mainly produced in Panshui Street, Nanhu Street, Qingshan Town, Gaomian Township and other towns (streets) in Pu'an County. Most of them are mainly raised in captivity. They are characterized by high litter rate, tender meat, rich in lecithin, high protein and low fat. They are often called "beauty" food. Through crossbreeding with Belgian rabbits, the growth rate of the offspring can be improved, the adaptability and tolerance to roughage can be enhanced, the lactation performance of the offspring female rabbits can be improved, and a core group with relatively stable production performance can be selected. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention will be described in detail below so that the purpose, characteristics and advantages of the present invention can be more clearly understood. It should be understood that the embodiments are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0029] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0030] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0031] Embodiment 1:

[0032] (1) First, the domesticated Ira rabbits and Belgian rabbits in Pu'an County, Guizhou Province were identified and evaluated, and the excellent Ira rabbits and Belgian rabbits were selected to form a hybrid group;

[0033] (2) hybridizing the hybrid group with the domesticated Ira rabbits from Pu'an County, Guizhou Province as the female parent and the domesticated Belgian rabbits from Pu'an County, Guizhou Province as the male parent to obtain the Fa generation Ibe rabbits;

[0034] (3) backcrossing the Belgian rabbits domesticated in Pu'an County, Guizhou Province as the male parent and the Fa generation Ibe rabbits obtained in step (2) as the female parent to obtain the Fb generation backcross offspring;

[0035] (4) using the excellent male rabbit of the backcross offspring Fb obtained in step (3) as the male parent and the excellent female rabbit of the backcross offspring Fb obtained in step (3) as the female parent to perform cross-crossing to obtain Fc cross-cross offspring;

[0036] (5) using the excellent male rabbit of the Fb generation obtained in step (3) as the male parent and the excellent female rabbit of the Fc generation obtained in step (4) as the female parent for close hybridization, and screening out an excellent breeding population of the Fbc generation with strong stress resistance and adaptability;

[0037] (6) using the excellent male rabbit of the Fc generation obtained in step (4) as the male parent and the excellent female rabbit of the Fb generation hybrid offspring obtained in step (3) as the female parent for close hybridization, and screening out the excellent breeding population of the Fcb generation with a high survival rate of breeding litters, strong stress resistance and adaptability;

[0038] (7) using the excellent male rabbit of the Fbc generation obtained in step (5) as the male parent and the excellent female rabbit of the Fcb generation obtained in step (6) as the female parent for close hybridization, and screening out the excellent breeding population of the Fb1c1 generation with larger individuals, faster growth, stronger stress resistance and better adaptability;

[0039] (8) hybridizing the Fcb generation excellent male rabbit obtained in step (6) as the male parent and the Fbc generation excellent female rabbit obtained in step (5) as the female parent, and screening out the Fc1b1 generation excellent breeding group with strong individuals, larger individuals, faster growth and development, stronger stress resistance, stronger adaptability and better lactation performance;

[0040] (9) hybridizing the Fb1c1 generation excellent male rabbit obtained in step (7) as the male parent and the Fc1b1 generation excellent female rabbit obtained in step (8) as the female parent, and screening out the Fb2c2 generation excellent breeding group with strong individuals, larger individuals, faster growth and development, stronger stress resistance, stronger adaptability and better lactation performance;

[0041] (10) hybridizing the Fc1b1 generation excellent male rabbit obtained in step (8) as the male parent and the Fb1c1 generation excellent female rabbit obtained in step (7) as the female parent, and screening out the Fc2b2 generation excellent breeding population with strong individuals, larger individuals, faster growth and development, stronger stress resistance and adaptability;

[0042] (11) hybridizing the excellent male rabbit of the Fb2c2 generation obtained in step (9) as the male parent and the excellent female rabbit of the Fc2b2 generation obtained in step (10) as the female parent to obtain the excellent breeding group Fb3c3, and selecting the excellent male and female rabbit breeding groups from Fb3c3 for cross-crossing and fixation.

[0043] (12) hybridizing the excellent male rabbit of the Fc2b2 generation obtained in step (10) as the male parent and the excellent female rabbit of the Fb2c2 generation obtained in step (9) as the female parent to obtain the excellent breeding group Fc3b3, and selecting the excellent male and female rabbit breeding groups from Fc3b3 for cross-crossing and fixation.

[0044] Through multiple screening of the progeny of cross-crossing (11) and (12), the basic core group for breeding new meat rabbit varieties can be screened out, and a breeding core group of new meat rabbit strains with excellent production performance such as larger individuals, faster growth and development, higher reproduction rate, stronger stress resistance, stronger adaptability and better lactation performance can be bred.

[0045] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for breeding a new breed of meat rabbits, characterized in that: It includes forming a hybrid group of Ira rabbits and Belgian rabbits that have been identified, evaluated and screened, and hybridizing with Ira rabbits as the female parent and Belgian rabbits as the male parent to obtain the Fa generation Ira rabbits, and then through multiple screenings and combining methods including backcrossing, close hybridization and cross-crossing fixation, finally the target strain is obtained.

2. The method for breeding a new breed of meat rabbit according to claim 1, characterized in that: In the first backcross, the Fa generation Ibe rabbit was used as the female parent, and the Belgian rabbit domesticated locally in Pu'an County, Guizhou Province was used as the male parent to obtain the Fb generation backcross offspring.

3. The method for breeding a new breed of meat rabbit according to claim 2, characterized in that: After obtaining the Fb generation backcross offspring, the obtained excellent male rabbit of the Fb generation backcross offspring is used as the father and the obtained excellent female rabbit of the Fb generation backcross offspring is used as the mother to perform cross-crossing to obtain the Fc cross-cross offspring.

4. The method for breeding a new breed of meat rabbit according to claim 3, characterized in that: The excellent male rabbit of the Fb generation is used as the paternal parent and the excellent female rabbit of the Fc generation is used as the female parent to carry out close hybridization to screen out the excellent breeding group of the Fbc generation; the excellent male rabbit of the Fc generation is used as the paternal parent and the excellent female rabbit of the hybrid offspring of the Fb generation is used as the female parent to carry out close hybridization to screen out the excellent breeding group of the Fcb generation.

5. The method for breeding a new breed of meat rabbit according to claim 4, characterized in that: The excellent male rabbit of Fbc generation was used as the paternal parent and the excellent female rabbit of Fcb generation was used as the female parent for close hybridization to screen out the excellent breeding group of Fb1c1 generation; the excellent male rabbit of Fcb generation was used as the paternal parent and the excellent female rabbit of Fbc generation was used as the female parent for hybridization to screen out the excellent breeding group of Fc1b1 generation.

6. The method for breeding a new breed of meat rabbit according to claim 5, characterized in that: The excellent male rabbit of Fb1c1 generation was used as the paternal parent and the excellent female rabbit of Fc1b1 generation was used as the female parent for hybridization to screen out the excellent breeding group of Fb2c2 generation; the excellent male rabbit of Fc1b1 generation was used as the paternal parent and the excellent female rabbit of Fb1c1 generation was used as the female parent for hybridization to screen out the excellent breeding group of Fc2b2 generation.

7. The method for breeding a new breed of meat rabbit according to claim 6, characterized in that: The excellent male rabbit of the Fb2c2 generation was used as the paternal parent and the excellent female rabbit of the Fc2b2 generation was used as the female parent to obtain the excellent breeding group Fb3c3, and the excellent male and female rabbit breeding groups were selected from Fb3c3 for cross-crossing and fixation; the excellent male rabbit of the Fc2b2 generation was used as the paternal parent and the excellent female rabbit of the Fb2c2 generation was used as the female parent to obtain the excellent breeding group Fc3b3, and the excellent male and female rabbit breeding groups were selected from Fc3b3 for cross-crossing and fixation.

8. The method for breeding a new breed of meat rabbit according to claim 6, characterized in that: The screening indicators of the Fbc generation excellent breeding group include stress resistance and adaptability; the screening indicators of the Fcb generation excellent breeding group include reproduction survival rate, stress resistance and adaptability; the screening indicators of the Fb1c1 generation excellent breeding group include individual size, growth rate, stress resistance and adaptability; the screening indicators of the Fc1b1 generation excellent breeding group include individual robustness, individual size, growth and development rate, stress resistance, adaptability and lactation performance; the screening indicators of the Fb2c2 generation excellent breeding group include individual robustness, individual size, growth and development rate, stress resistance, adaptability and lactation performance; the screening indicators of the Fc2b2 generation excellent breeding group include individual robustness, individual size, growth and development rate, stress resistance and adaptability.

9. The method for breeding a new breed of meat rabbit according to claim 8, characterized in that: The offspring of the Fb3c3 excellent breeding group and the Fc3b3 excellent breeding group were screened multiple times to select the basic core group for breeding of new meat rabbit varieties. The screening indicators included individual size, growth and development rate, reproduction rate, stress resistance, adaptability and lactation performance.

10. The method for breeding a new breed of meat rabbit according to any one of claims 1 to 9, characterized in that: The Ira rabbit is a domesticated Ira rabbit native to Pu'an County, Guizhou Province, and the Belgian rabbit is a domesticated Belgian rabbit native to Pu'an County, Guizhou Province.