First molecular genetic evidence for automictic parthenogenesis in cockroaches
First molecular genetic evidence for automictic parthenogenesis in cockroaches
复制标题
蟑螂自交孤雌生殖的第一个分子遗传学证据
DOI：
10.1111/1744-7917.12572
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发表时间：
2019
期刊：
影响因子：
4
通讯作者：
Takaaki Daimon
中科院分区：
文献类型：
--
作者：
Masashi Tanaka;Takaaki Daimon
Parthenogenesis is an asexual mode of reproduction that plays an important role in the evolution of sex, sociality, and reproduction strategies in insects. Some species of cockroach exhibit thelytoky, a type of parthenogenesis in which female offspring are produced without fertilization. However, the cytological and genetic mechanisms of parthenogenesis in cockroaches are not well understood. Here we provide the first molecular genetic evidence that cockroaches can reproduce through automixis. Using the American cockroachPeriplaneta americana, we performed microsatellite analysis to investigate the genetic relationship between parthenogenetically produced nymphs and the parent virgin females, and found that all parthenogenetic offspring were homozygous for autosomal microsatellite markers, whereas the female parents were heterozygous. In addition, flow cytometry analysis revealed that the parthenogenetic offspring were diploid. Taken together, our results demonstrate thatP. americanaexhibits automixis‐type thelytoky, in which diploidy is restored by gamete duplication or terminal fusion. These findings highlight the unique reproduction strategies of cockroaches, which are more varied than was previously recognized.
