Synthetic-line selection-breeding method by utilizing pig mark to assist selection

Abstract

The invention relates to a synthetic-line selection-breeding method by utilizing a pig mark to assist the selection, which comprises the steps that: agnate and maternal are firstly bred, then the patriline is mated with the maternal to obtain piglets, and is characterized in that: American large white and PIC337 pig are used as breeding materials of the agnate, boar produced by PIC1050*PIC1075 and Campbell sow are used as breeding materials of maternal, conventional genetic evaluation on all sows are carried out according to the present record so as to select excellent sows; mark genotype of each gene such as ESR, FSHbeta, IGF2, H-FABP, MC4R and the like of the selected excellent sows and all boars is detected; F1 basic group is selectively mated according to the mark genotype; and the F1 basic groups are mated with each other to form an F2 basic group to form a final basic group. The method has advantages that: due to the adoption of the above method, piglets with fast growth speed, good conversion efficiency of feed, good meat factor, good breeding capacity, good meat quality and excellent immunity can be bred.

Description

technical field [0001] The invention relates to a method for selecting and breeding pigs, in particular to a method for selecting and breeding pigs to achieve superior birth and fertility through marker-assisted selection of pigs. Background technique [0002] There are two main reasons for this situation: ① Due to the adoption of the breeding model of large companies or consortiums in foreign countries, the breeding population is large in scale and the breeding objectives are continuously improved (growth speed, feed conversion efficiency and lean meat rate + fecundity + meat quality + Disease resistance), advanced breeding technology (PLUP breeding + molecular breeding), etc., make its pig breeds have incomparable advantages in terms of growth rate, feed conversion efficiency and lean meat rate, and it can be believed that with the With the deepening of its selection, it will also have more and more competitive advantages in terms of fecundity, meat quality and disease res...

AI Technical Summary

Problems solved by technology

② In the 1980s and 1990s, the selection and breeding of new varieties (lines) was widely carried out in China, but because most of them adopted the model of hybrid breeding of local varieties × introduced varieties, the size of the basic population was small, and the breeding technology was relatively backward. Most of the bred varieties (lines) are nondescript and hard to keep, except for a few such as Sutai.

However, as far as joint breeding is concerned, there are still many problems such as the lack of inter-farm genetic linkages, and the in-field measurement system is not perfect. Variety as material lacks comparative advantage