A speciation gene for left–right reversal in snails results in anti-predator adaptation

University of Taipei > 理學院 > 應用物理暨化學學系暨碩士班 > 期刊論文 > Item 987654321/4658

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题名:	A speciation gene for left–right reversal in snails results in anti-predator adaptation
作者:	吳書平 Shu-Ping Wu Masaki Hoso Yuichi Kameda Takahiro Asami Makoto Kato & Michio Hori
日期:	2010-12-07
上传时间:	2011-06-22
摘要:	How speciation genes can spread in a population is poorly understood. In land snails, a single gene for left–right reversal could be responsible for instant speciation, because dextral and sinistral snails have difficulty in mating. However, the traditional two-locus speciation model predicts that a mating disadvantage for the reversal should counteract this speciation. In this study, we show that specialized snake predation of the dextral majority drives prey speciation by reversal. Our experiments demonstrate that sinistral Satsuma snails (Stylommatophora: Camaenidae) survive predation by Pareas iwasakii (Colubroidea: Pareatidae). Worldwide biogeography reveals that stylommatophoran snail speciation by reversal has been accelerated in the range of pareatid snakes, especially in snails that gain stronger anti-snake defense and reproductive isolation from dextrals by sinistrality. Molecular phylogeny of Satsuma snails further provides intriguing evidence of repetitive speciation under snake predation. Our study demonstrates that a speciation gene can be fixed in populations by positive pleiotropic effects on survival.
關聯:	Nature Communications
显示于类别:	[應用物理暨化學學系暨碩士班] 期刊論文

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