Population structure and inbreeding effects on growth traits of Santa Ines sheep in Brazil

被引：71

作者：

Pedrosa, V. B. ^{[1
]}

Santana, M. L., Jr. ^{[1
]}

Oliveira, P. S. ^{[1
]}

Eler, J. P. ^{[1
]}

Ferraz, J. B. S. ^{[1
]}

机构：

[1] Univ Sao Paulo, Grp Melhorarnento Anim & Biotecnol, Fac Zootecnia & Engn Alimentos, BR-13635970 Pirassununga, SP, Brazil

来源：

SMALL RUMINANT RESEARCH | 2010年 / 93卷 / 2-3期

关键词：

Effective population size; Inbreeding; Generation interval; DEPRESSION;

D O I：

10.1016/j.smallrumres.2010.05.012

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The aim of this study was to describe the population structure, inbreeding and to quantify their effect for different weights, of Santa Ines sheep. For this reason, 6490 data of production and 17,097 animals in the pedigree data set were utilized to evaluate birth weight (BW), weight at 60 days (W60) and weight at 180 days (W180). The genetic structure analysis of the population was realized by the software ENDOG (v.4.6.), resulting in some level of inbreeding for 21.72% of the animals in the pedigree data, being 41.02% the maximum value, and average of 10.74% for the inbred individuals. The population average inbreeding was 2.33% and the average relatedness was 0.73%. The effective number of ancestors was 156 animals and the effective number of founders was 211 individuals. A significant depressive effect of the inbreeding can be verified for all traits. The monitored parameters related with the genetic variability on this population must be constant in order to prevent the decrease in the genetic progress. The utilization of a program for directed mating in the present flock is an appropriate alternative to keep the level of inbreeding under control. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：135 / 139

页数：5

共 24 条

[1] Resistance of Santa Ines, Suffolk and Ile de France sheep to naturally acquired gastrointestinal nematode infections [J].