Restricted selection and effective population size

被引:1
作者
Wei, RP [1 ]
机构
[1] SWEDISH UNIV AGR SCI,DEPT FOREST GENET & PLANT PHYSIOL,S-90183 UMEA,SWEDEN
关键词
selection; family; truncation; effective size;
D O I
10.1051/gse:19960303
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
A simple and flexible selection method, 'restricted truncation selection', has been developed to screen superior individuals from populations with family structure. 'Restricted' means placing limits on the contributions of families to the selected group and on the number of families allowed to contribute. Selection is made on the basis of individual performance judged by phenotype or breeding value estimate. Formulae have been derived to predict the approximate effective population size in the selected group. Changes in the restrictions used modify the distribution of family contributions and thus lead to different effective sizes in the selected population. Effective size is influenced by sib type, heritability, selection intensity, initial family number and size. It is decreased by restrictions on the family number but increased by restrictions on family contributions. The application of the predictions of effective sixes to planning a breeding population is discussed.
引用
收藏
页码:237 / 247
页数:11
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