Method for breeding improved mutton sheep strain

Abstract

The invention provides a method for breeding an improved mutton sheep strain, which includes the steps: firstly, using a plurality of rams as strain ancestors to mate with 30-50 ewes respectively so as to establish a plurality of families; secondly, performing beneficial-trait within-family selection to more than four generations of the families established in the step 1; thirdly, subjecting the families selected in the step 2 to family hybridization; fourthly, using hybrids obtained in the step 3 and family non-hybrids to establish a strain breeding core group, and grouping other individuals as a production group; fifthly, subjecting the core group established in the step 4 to beneficial trait selection, opening the core group, allowing selected qualified individuals in the production group to enter the core group, introducing 'foreign blood' timely to avoid inbreeding depression; and sixthly, obtaining the mutton sheep strain with beneficial traits adaptable to local environment by multi-generational breeding. By using the method to breed the improved mutton sheep strain, dependence on foreign varieties is lessened, and the current situation of 'all introduction and propagation and no breeding' in the field of breeding sheep introduction in China is changed.

Description

Technical field [0001] The invention belongs to the field of livestock breeding, and specifically relates to a method for cultivating excellent mutton sheep strains. Background technique [0002] With the economic development and the improvement of national income, people's dietary structure is constantly changing, and the demand for high-quality and high-nutrition meat, especially lamb, is rapidly increasing. In order to meet the people's increasing demand for mutton, in addition to vigorously increasing the number of sheep on the one hand, it is to increase the yield of mutton sheep. The quality of sheep breeds largely determines the growth rate, feed conversion rate, meat yield and meat quality of mutton sheep. Compared with the world's fine meat sheep, my country's existing local sheep breeds are generally small in size, slow in growth, and low in meat production. In order to rapidly improve the meat production performance of existing varieties, improve meat quality, increa...

AI Technical Summary

Problems solved by technology

Due to the lack of awareness of breeding in most enterprises, the small scale of the imported breeds and the lack of corresponding breeding technology, most of the imported breeding sheep directly flow into the market, except for a few localized breeding, purification and improved breeding.

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