EFFECT OF SAMPLING ERRORS ON EFFICIENCY OF SELECTION INDEXES .2. USE OF INFORMATION ON ASSOCIATED TRAITS FOR IMPROVEMENT OF A SINGLE IMPORTANT TRAIT

被引：84

作者：

SALES, J ^{[1
]}

HILL, WG ^{[1
]}

机构：

[1] INST ANIM GENET, EDINBURGH EH9 3JN, SCOTLAND

来源：

ANIMAL PRODUCTION | 1976年 / 23卷 / AUG期

关键词：

D O I：

10.1017/S0003356100031020

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

An analysis is undertaken of the effect of errors in estimates of parameters on the response to selection for an economically important trait (trait 1) when 1 or more additional traits are added in a selection index. The detailed analysis is confined to 1 additional trait (trait 2) which contributes useful information unless the genetic and phenotypic regressions of trait 1 on trait 2 are equal. If there are errors in parameter estimates the extra response obtained by including trait 2 will usually be over-predicted. When trait 2 actually contributes no useful information the predicted benefit equals the real loss in efficiency from its inclusion. The loss in efficiency from poor estimation of parameters, whether or not the 2nd trait makes a contribution, is roughly 1/4 of the squared coefficient of variation of a heritability estimate of trait 1 in the same experiment.

引用

页码：1 / 14

页数：14

共 10 条

[1]

GJEDREM TRYGVE, 1967, ACTA AGR SCAND, V17, P263

[2] EXPECTED + PREDICTED PROGRESS FROM INDEX SELECTION INVOLVING ESTIMATES OF POPULATION PARAMETERS [J].