GAMETIC IMPRINTING EFFECTS ON RATE AND COMPOSITION OF PIG GROWTH

被引：41

作者：

DEVRIES, AG ^{[1
]}

KERR, R ^{[1
]}

TIER, B ^{[1
]}

LONG, T ^{[1
]}

MEUWISSEN, THE ^{[1
]}

机构：

[1] DLO,IVO,3700 AM ZEIST,NETHERLANDS

来源：

THEORETICAL AND APPLIED GENETICS | 1994年 / 88卷 / 08期

关键词：

VARIANCE COMPONENTS; GAMETIC IMPRINTING GROWTH; PIGS;

D O I：

10.1007/BF00220813

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Genetic improvement schemes in livestock are based on the assumption that the expression of relevant genes is independent of parent of origin. Until now no evidence has been found to reject this assumption. The present study on three purebred pig populations, however, shows that a significant proportion of the phenotypic variance in backfat thickness (5-7%) can be explained by genes subject to paternal imprinting. The implication is that there are genes affecting backfat that are expressed only when derived from the paternal gamete. Paternal imprinted effects explained 1-4% of the phenotypic variation for growth rate. Maternal imprinted effects were heavily confounded with heritable maternal environmental effects. When modelled separately, these effects explained 2-5% and 3-4% of the phenotypic variance in backfat thickness and growth rate, respectively. Gametic imprinting may have consequences for the optimization of breeding programmes, especially in crossbreeding systems with specialized sire and dam lines.

引用

页码：1037 / 1042

页数：6

共 22 条

[1] THE MOUSE INSULIN-LIKE GROWTH-FACTOR TYPE-2 RECEPTOR IS IMPRINTED AND CLOSELY LINKED TO THE TME LOCUS [J].