验证澳大利亚绵羊健壮性反应标准育种值

IF 3.6 1区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Dominic L. Waters, Sam A. Clark, Daniel J. Brown, Samuel F. Walkom, Julius H. J. van der Werf
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引用次数: 0

摘要

由于基因型与环境(G×E)之间的相互作用,不同动物在不同环境下的遗传优势的稳定性可能存在差异。育种计划可以利用这种差异来选择稳健的基因型,这些基因型既有较高的整体表现,又能在不同环境中保持稳定的遗传排名。目前很少有人尝试验证家畜的稳健性育种值,尽管这是将其应用于选育决策的必要步骤。本研究的目的是验证不同生长环境下体重稳健性的育种值,这些育种值是在绵羊数据中使用反应规范模型估算的。通过对 337 头父系羊的后代进行三次交叉验证,反应标准斜率的单步育种值与后代在不同生长环境下的实际稳健性之间的平均相关性为 0.21。在两个不同的数据集中独立估算的反应斜率育种值之间的相关性接近基于理论的预期相关性。利用反应标准模型获得的斜率估计育种值(EBV)可以预测后代在不同环境下的表型稳健性,并且对两个不同数据集中有后代的父本具有一致性。基于反应规范 EBV 的选择可用于提高种群对环境变化的稳健性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Validation of reaction norm breeding values for robustness in Australian sheep
There can be variation between animals in how stable their genetic merit is across different environments due to genotype-by-environment (G×E) interactions. This variation could be used in breeding programs to select robust genotypes that combine high overall performance with stable genetic ranking across environments. There have been few attempts to validate breeding values for robustness in livestock, although this is a necessary step towards their implementation in selection decisions. The objective of this study was to validate breeding values for the robustness of body weight across different growth environments that were estimated using reaction norm models in sheep data. Using threefold cross-validation for the progeny of 337 sires, the average correlation between single-step breeding values for the reaction norm slope and the realised robustness of progeny across different growth environments was 0.21. The correlation between breeding values for the reaction slope estimated independently in two different datasets linked by common sires was close to the expected correlation based on theory. Slope estimated breeding values (EBV) obtained using reaction norm models were predictive of the phenotypic robustness of progeny across different environments and were consistent for sires with progeny in two different datasets. Selection based on reaction norm EBV could be used to increase the robustness of a population to environmental variation.
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来源期刊
Genetics Selection Evolution
Genetics Selection Evolution 生物-奶制品与动物科学
CiteScore
6.50
自引率
9.80%
发文量
74
审稿时长
1 months
期刊介绍: Genetics Selection Evolution invites basic, applied and methodological content that will aid the current understanding and the utilization of genetic variability in domestic animal species. Although the focus is on domestic animal species, research on other species is invited if it contributes to the understanding of the use of genetic variability in domestic animals. Genetics Selection Evolution publishes results from all levels of study, from the gene to the quantitative trait, from the individual to the population, the breed or the species. Contributions concerning both the biological approach, from molecular genetics to quantitative genetics, as well as the mathematical approach, from population genetics to statistics, are welcome. Specific areas of interest include but are not limited to: gene and QTL identification, mapping and characterization, analysis of new phenotypes, high-throughput SNP data analysis, functional genomics, cytogenetics, genetic diversity of populations and breeds, genetic evaluation, applied and experimental selection, genomic selection, selection efficiency, and statistical methodology for the genetic analysis of phenotypes with quantitative and mixed inheritance.
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