A method for multi-trait selective crossbreeding sheep suitable for alpine environment

Abstract

The invention discloses a multi-character selective crossbreeding method for sheep suitable for alpine environment, and belongs to the technical field of livestock breeding. The steps of the method: use the Horba sheep local group as the female parent of the F1 generation of hybridization, and the East Fried sheep as the male parent of the F1 generation of hybridization to obtain the F1 generation of hybridization; use the female sheep in F1 as the female parent of the F2 generation of hybridization, and use the female sheep of the F1 generation as the female parent of the F2 generation. The sheep were the F2 generation hybrid male parent, and the second generation F2 hybrid was obtained; the female sheep in F2 was used as the F3 generation hybrid female parent, and the Suffolk sheep was the F3 generation hybrid male parent, and the third generation F3 hybrid was obtained; the female sheep in F3 was used as the F3 hybrid female parent. The female parent of the F4 crossbreed, Dorset sheep was the male parent of the F4 crossbreed, and the four-generation F4 was obtained; the four-generation F4 was used as the female parent and the male parent for cross-fixation, and the target sheep core group was obtained. The beneficial effect of the present invention is to solve the problem of cultivating a high-breeding and grain-saving core group of meat sheep with tender meat, double lambs, fast growth, no horns and stable genetic performance suitable for the alpine environment.

Description

technical field [0001] The invention relates to the technical field of livestock breeding, in particular to a method for multi-character selective crossbreeding of sheep suitable for alpine environment. Background technique [0002] The area of ​​natural grassland in Tibet exceeds that of Inner Mongolia and Xinjiang, ranking first in the country, and is one of the major pastoral areas in China. However, the frost-free period is short, the pasture growth period is short, and the grass yield of natural grass is low, which is far from meeting the needs of modern breeding production. [0003] The horns of sheep are needed for self-defense against foreign invasion. With the development of grazing or semi-grazing sheep farming, the utilization rate of double horns of existing sheep breeds or local groups in high-altitude areas is extremely low, and forage is wasted due to the growth and development of double horns. [0004] Breeding of new breeds of meat sheep at home and abroad...

AI Technical Summary

Problems solved by technology

With the development of grazing or semi-grazing sheep farming, the utilization rate of double horns of existing sheep breeds or local groups in high-altitude areas is extremely low, and forage is wasted due to the growth and development of double horns

[0004] Breeding of new breeds of meat sheep at home and abroad has basically achieved hornlessness, but it is difficult to breed high-breeding breeds in the half-house feeding mode of grazing during the day and supplementary feeding at night. Two-way or three-way crosses are used, and four-way crosses are rarely used. Group can breed ewes reproductive rate 140%-160%

[0005] At present, the breeding of mutton sheep in the alpine environment is mainly based on the selection and improvement of this breed. There is no multi-variety hybridization breeding of ternary or more, and there is no new breed of high-breeding and grain-saving mutton sheep suitable for the alpine environment.

Images