Moritz C, Wright J W, Brown W M
Laboratory of Molecular systematics, Museum of Zoology and Department of Biology, University of Michigan, Ann Arbor, MI, 48109, USA.
Section of Herpetology, Natural History Museum of Los Angeles County, Los Angeles, CA, 90007, USA.
Evolution. 1992 Feb;46(1):184-192. doi: 10.1111/j.1558-5646.1992.tb01993.x.
Within the genus Cnemidophorus, parthenogenesis has arisen by hybridization several times. This provides the opportunity to investigate general features of hybridization events that result in the formation of parthenogenetic lineages. The relationships of mtDNA from all bisexual species of Cnemidophorus known to be parents of parthenogens were investigated to evaluate phylogenetic constraints on the hybrid-origin of parthenogenesis. No phylogenetic clustering of the parental species, either maternal or paternal, was apparent. However, the combination of bisexual species that have resulted in parthenogenetic lineages are generally distantly related or genetically divergent. This contrasts with the expectation if parthenogenesis in hybrids is due to the action of a single rare allele, but is consistent with the hypothesis that some minimal level of divergence is necessary to stimulate parthenogenetic reproduction in hybrids.
在鞭尾蜥属中，孤雌生殖已通过杂交多次出现。这为研究导致孤雌生殖谱系形成的杂交事件的一般特征提供了机会。对所有已知为孤雌生殖亲本的双性恋鞭尾蜥物种的线粒体DNA关系进行了研究，以评估孤雌生殖杂交起源的系统发育限制。亲本物种无论是母本还是父本，均未出现明显的系统发育聚类。然而，导致孤雌生殖谱系的双性恋物种组合通常关系较远或基因差异较大。这与杂交中孤雌生殖是由单个稀有等位基因的作用导致的预期相反，但与某些最低程度的差异是刺激杂交中孤雌生殖繁殖所必需的假设一致。
