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首页> 外文期刊>Archivos Latinoamericanos de Produccion Animal >Genetic improvement of overall reproductive successin sheep: A review
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Genetic improvement of overall reproductive successin sheep: A review

机译：绵羊总体生殖成功的遗传改良：综述

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摘要

Reproduction is an economically important complex composite trait in sheep. Genetic improvement of composite traits can occur by selection for individual components traits, some combination of individual component traits, or by direct selection for the composite trait. This review discusses the responses of selecting directly for litter weight weaned compared to selection responses for one of its component traits. Litter weight weaned is concluded to be a biological selection index determined by environmental factors under which it is selected for. Selection for litter weight weaned can result in a balanced biological composite trait with favorable responses in component traits such as fertility, number of lambs born, lamb survival, lactation, and lamb growth. It is concluded that selection to improve reproductive efficiency under most production and environmental systems would benefit from selection for a composite trait such as litter weight weaned rather than for a single component trait.
机译：繁殖是绵羊经济上重要的复杂复合特征。复合性状的遗传改良可通过选择单个成分性状，单个成分性状的某种组合或通过直接选择复合性状来实现。这篇综述讨论了直接选择断奶仔猪体重的反应与其选择性状之一的选择反应。断奶仔猪的体重被认为是由选择它的环境因素决定的生物学选择指数。断奶仔猪体重的选择可以导致平衡的生物复合性状，并在组成性状如生育力，出生的羔羊数，羔羊存活，泌乳和羔羊生长方面具有良好的响应。结论是，在大多数生产和环境系统下提高生殖效率的选择将受益于对诸如断奶仔猪体重等综合性状的选择，而不是针对单一成分性状的选择。

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