コリデール種2才雌緬羊の選抜指数

概要

論文の詳細を見る
The data in this study are obtained from Corriedale yearling ewes raised at the Department of Animal Husbandry. Hokkaido National Agricultural Experiment Station during a 7-year period from 1951 to 1957. The indices for selecting yearling ewes are developed. These contain one or more of the three characters studied - body weight before shearing, greasy fleece weight and staple length. Each of the indices is directed toward selecting for the same aggregate genotype containing the genic values of these three characters. The genic values of these three characters are weighted by their respective relative economic values. The correlations between indices and aggregate genic values are nearly the same values for the indices including three or two characters except the staple length. Expected genetic changes in the means of the population selected on different criteria of selection are compared. It is evident that when threecharacters are selected at the same time the efiiciency of selection based on the index will be greater than selecting by any one of the characters involved in this study.
日本育種学会の論文
1962-07-05