Hybridization in large-bodied new world primates
Hybridization in large-bodied new world primates
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DOI：
10.1534/genetics.107.074278
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发表时间：
2007-08-01
期刊：
影响因子：
3.3
通讯作者：
Berminghamt, Eldredge
中科院分区：
文献类型：
--
作者：
Cortes-Ortiz, Liliana;Duda, Thomas F., Jr.;Berminghamt, Eldredge
灵长类动物之间的自然杂交并不常见。在新世界灵长类动物中，只有小型物种的自然杂交被报道，但没有收集到任何基因型数据来证实这些报道。在这里，我们提出的遗传证据杂交的两个大的身体物种的新热带灵长类动物，分歧类似于3百万年。我们使用物种诊断线粒体和微卫星位点和Y染色体Sry基因，以确定从墨西哥塔巴斯科州的同域分布区收集的36个个体的杂交状态。十三个人是混血儿。我们表明，杂交和随后的回交是有方向性偏差的，并且亲本物种之间唯一可能的杂交产生可育的杂交雌性，但未能产生可存活或可育的雄性。该系统可以作为一个模型来研究尚未实现完全生殖隔离的灵长类物种之间的基因交换。
Well-documented cases of natural hybridization among primates are not common. In New World primates, natural hybridization has been reported only for small-bodied species, but no genotypic data have ever been gathered that confirm these reports. Here we present genetic evidence of hybridization of two large-bodied species of neotropical primates that diverged similar to 3 MYA. We used species-diagnostic mitochondrial and microsatellite loci and the Y chromosome Sry gene to determine the hybrid status of 36 individuals collected from an area of sympatry in Tabasco, Mexico. Thirteen individuals were hybrids. We show that hybridization and subsequent backcrosses are directionally biased and that the only likely cross between parental species produces fertile hybrid females, but fails to produce viable or fertile males. This system can be used as a model to study gene interchange between primate species that have not achieved complete reproductive isolation.