Genetic Differentiation among Commercial Lines of Laying-type Japanese Quail
Genetic Differentiation among Commercial Lines of Laying-type Japanese Quail
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DOI：
10.2141/jpsa.0170213
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发表时间：
2019-01-01
影响因子：
1.5
通讯作者：
Tadano, Ryo
中科院分区：
文献类型：
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作者：
Shimma, Kiyohito;Tadano, Ryo
最近在日本，大约有600万只鹌鹑主要用于商业蛋生产。据信，该国几乎所有的商业鹌鹑在第二次世界大战期间灭绝，目前的商业基因库是从有限数量的幸存鸟类中恢复的。本研究利用45个微卫星基因型对12个产蛋型日本鹌鹑品系的遗传多样性和遗传分化进行了分析。平均等位基因数为5.22-5.69，期望杂合度为0.601-0.618。这些结果表明，本研究中的产蛋型鹌鹑品系比以前研究中的实验鹌鹑品系表现出更高程度的遗传多样性。品系间的成对遗传分化（F-ST）显著但较弱（F-ST = 0.0028-0.0254; 57.6%），其余品系间未发现显著分化。这也证实了遗传聚类分析，其中个人没有形成独立的集群符合其线的起源。本研究结果表明，产蛋型鹌鹑品系内遗传多样性较高，品系间遗传分化不明显。遗传分化的缺失可能反映了产蛋型鹌鹑的育种历史。
Recently in Japan, approximately six million quails were primarily being reared for commercial egg production. It is believed that almost all commercial quails in the country became extinct during World War II, and that the present commercial gene pool was restored from the limited number of surviving birds. The present study evaluates the genetic diversity within and differentiation between 12 laying-type Japanese quail lines on the basis of 45 microsatellite genotypes. The mean number of alleles per locus and the expected heterozygosity within a quail line were 5.22-5.69 and 0.601-0.618, respectively. These results showed that laying-type quail lines in the present study exhibited a higher degree of genetic diversity than experimental quail lines in a previous study. Pairwise genetic differentiations (F-ST) between lines were significant but weak (F-ST = 0.0028-0.0254; 57.6%), and no significant differentiations were found between the remainder. This was also confirmed by genetic clustering analyses, in which individuals did not form independent clusters consistent with their line origins. The results of the present study indicate relatively high genetic diversity within and no clear genetic differentiation between laying-type quail lines. Absence of genetic differentiation may reflect the breeding history of laying-type quails.