根据内布拉斯加州无特定病原体猪群的现场记录估算的遗传和表型参数。

Genetic and phenotypic parameters estimated from Nebraska specific-pathogen-free swine field records.

作者信息

David P J, Johnson R K, Socha T E

出版信息

J Anim Sci. 1983 Nov;57(5):1117-23. doi: 10.2527/jas1983.5751117x.

DOI:10.2527/jas1983.5751117x

Abstract

Records collected during 1971 through 1979 from 101,606 hogs raised in 18 Nebraska Specific Pathogen Free herds were analyzed. Traits considered were backfat at 100 kg (BF), weight at 140 d of age (WT) and, in some analyses, number of live pigs/litter at birth (NBA). The phenotypic correlation of BF and WT, averaged across herds, was -.07. The correlations between BF and NBA and between WT and NBA were .04 and -.05, respectively. Average phenotypic standard deviations for BF, WT and NBA were 2.6 mm, 8.8 kg and 2.0 pigs. Estimates of the heritability of BF and WT were lower than most estimates reported from university research herds. Within breed, herd and sex estimates of heritability ranged from -.22 and .51 (unweighted mean = .16 +/- .025) for BF and ranged from -.28 to .49 (mean = .16 +/- .016) for WT. Estimates of the genetic correlation between BF and WT were extremely variable (mean = -.62 +/- 14.3, range = -9.42 to 1.30) among breed-herd-sex subclasses.

摘要

对1971年至1979年期间从内布拉斯加州18个无特定病原体猪群中饲养的101,606头猪收集的记录进行了分析。所考虑的性状包括100千克时的背膘厚（BF）、140日龄时的体重（WT），并且在一些分析中还包括出生时每窝活猪的数量（NBA）。各猪群的BF与WT的表型相关性平均为-0.07。BF与NBA之间以及WT与NBA之间的相关性分别为0.04和-0.05。BF、WT和NBA的平均表型标准差分别为2.6毫米、8.8千克和2.0头猪。BF和WT的遗传力估计值低于大学研究猪群报告的大多数估计值。在品种、猪群和性别范围内，BF的遗传力估计值在-0.22至0.51之间（未加权平均值 = 0.16 ± 0.025），WT的遗传力估计值在-0.28至0.49之间（平均值 = 0.16 ± 0.016）。在品种 - 猪群 - 性别亚类中，BF和WT之间的遗传相关性估计值变化极大（平均值 = -0.62 ± 14.3，范围 = -9.42至1.30）。