家畜高繁殖力性状遗传机制的研究进展

家畜繁殖力是一个对畜牧生产有重要影响的数量性状，文章从基因组和mRNA表达两个水平综述了家畜高繁殖力性状遗传机理的研究进展。这些研究成果表明，家畜高繁殖力受许多基因影响，而该性状的形成是多个基因共同表达与相互作用的一个综合结果。两种水平的研究都取得了很大的进展，但同基因组水平的研究相比，mRNA表达水平的研究仅关注在某一时期某一组织表达的基因，从mRNA表达水平进行研究能够找到对性状形成有直接贡献的基因。现在的研究多采用基因组水平和mRNA表达水平，随着科学技术研究的发展，还会为这一性状提供新的研究方法，但将来更有效的研究方法可能是多个水平综合进行的。

Progress in the Study on Genetic Mechanism for High Prolificacy in Farm Animals

Reproduction ability of farm animals is a quantitative trait that affects largely the husbandry productions. Progress in the study on genetic mechanism for high prolificacy in farm animals were reviewed at genome level and mRNA expression level in this paper. All these research results indicate that high prolificacy is a trait affected by a lot of genes, that is, the co-expression and interaction of these genes result in the formation of the trait. A lot of progresses have been made at all these two research levels. But differing from the genome level, the research at mRNA expression level only involves the genes expressed at special time in special tissues, and the genes directly contributed to the formation of traits. The genetic mechanism for this trait has been studying at the levels of genome and mRNA expression nowadays. With the development of sciences, new research methods for the trait will be provided, but only the combination of them with all these research levels will be the most effective.