He Jun, B Lopes Fernando, Wu Xiao Lin
CollegeofAnimalScienceand Technology, HunanAgricultural University, Changsha 410128, China.
Department of Animal Science, University of Wisconsin, Madison WI 53706, USA.
Yi Chuan. 2019 Jun 20;41(6):486-493. doi: 10.16288/j.yczz.19-053.
Genomic selection (GS) is a powerful tool which can be used to estimate the breeding value of individual animals by using the molecular markers of the animal's entire genome. GS improves the accuracy and intensity of selection, reduces the interval of generation, and realizes the effects of early accuracy selection contributing to a significant evolution in animal breeding. In the past decade, GS was successfully applied in the genetic improvement of dairy animals with improved selection accuracy and genetic gain of breeding animals. However, GS focuses on the genetic gain of target traits while it ignores the genetic relationship between mating pairs such that it ignores long term genetic merits such as an increase in inbreeding coefficient of offspring population, a decrease of genetic diversity and the homozygous presentation of harmful genes. In 2016, genomic mating (GM) was proposed as a sustainable genetic selection method using genomic information of the breeding candidate individuals to optimize selection and mating with resultant control of the growth rate of population inbreeding coefficient and achieving long-term and sustainable genetic progress. Therefore, GM is more suitable for modern animal breeding than GS, especially for the genetic improvement of indigenous species. In this review, we summarize the basic concepts, methods, and applications of GM, and then present examples comparing the effects of six simulated mating schemes. This review serves as a valuable reference for the applications of animal breeding methods.
基因组选择(GS)是一种强大的工具,可通过利用动物全基因组的分子标记来估计个体动物的育种值。基因组选择提高了选择的准确性和强度,缩短了世代间隔,并实现了早期准确选择的效果,对动物育种产生了重大变革。在过去十年中,基因组选择已成功应用于奶牛的遗传改良,提高了育种动物的选择准确性和遗传增益。然而,基因组选择侧重于目标性状的遗传增益,却忽略了交配个体之间的遗传关系,从而忽视了长期的遗传优势,如后代群体近交系数增加、遗传多样性降低以及有害基因的纯合表现。2016年,基因组选配(GM)作为一种可持续的遗传选择方法被提出,它利用候选育种个体的基因组信息来优化选择和交配,从而控制群体近交系数的增长速度,并实现长期和可持续的遗传进展。因此,与基因组选择相比,基因组选配更适合现代动物育种,特别是对于本土物种的遗传改良。在本综述中,我们总结了基因组选配的基本概念、方法和应用,然后给出了比较六种模拟交配方案效果的实例。本综述为动物育种方法的应用提供了有价值的参考。