Short communication: Validation of estimates of genetic trend in the Norwegian cattle population

被引：8

作者：

Heringstad, B ^{[1
]}

Klemetsdal, G ^{[1
]}

Ruane, J ^{[1
]}

机构：

[1] Agr Univ Norway, Dept Anim Sci, N-1432 As Nlh, Norway

来源：

JOURNAL OF DAIRY SCIENCE | 1999年 / 82卷 / 12期

关键词：

model validation; genetic trend;

D O I：

10.3168/jds.S0022-0302(99)75539-6

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

We examined alternative definitions of herd x year effects in models used to estimate genetic trends for clinical mastitis in Norwegian Cattle. The model with random herd x year effects showed significant bias and clearly overestimated genetic trend. To obtain unbiased estimates of genetic trend for clinical mastitis with this data, herd x year should be defined as fixed. Our results emphasized the importance of validating estimates of genetic trend.

引用

页码：2811 / 2812

页数：2

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