Sexual and postmating reproductive isolation between allopatric Drosophila montana populations suggest speciation potential.
Sexual and postmating reproductive isolation between allopatric Drosophila montana populations suggest speciation potential.
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同种异体果蝇蒙大拿州人群之间的性生殖隔离表明了物种潜力。
DOI：
10.1186/1471-2148-11-68
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发表时间：
2011-03-14
影响因子：
3.4
通讯作者：
Hoikkala A
中科院分区：
文献类型：
--
作者：
Jennings JH;Mazzi D;Ritchie MG;Hoikkala A
广泛分布的物种，其种群适应不同的环境条件，可以为追踪生殖不相容性的发生及其在物种形成过程中的作用提供宝贵的机会。Drosophila montana，a D.在地球仪的新北和古北地区的高纬度北方森林中发现的virilis类群的物种，可能是研究物种形成早期阶段的一个很好的模式系统，因为可以获得关于该物种的生态学、交配系统、生活史、遗传学和地理学的丰富信息。然而，人口之间的生殖障碍迄今尚未调查。我们报告前和交配后的障碍，从欧洲（芬兰）和北美（加拿大）种群的果蝇蒙大拿州之间的繁殖。使用一系列的交配选择设计，我们表明，这两个种群的苍蝇交配频率相同（即，表现出显著的性隔离），同时强调实验设计在这类研究中的重要性。我们还评估了潜在的交配后隔离量化内和种群间杂交的鸡蛋和后代生产，并显示出显着的单向减少后代生产，影响男性和女性后代平等。我们提供的证据表明，异地D。蒙大拿州的人口表现出生殖隔离，我们讨论了潜在的机制。我们的数据强调了实验设计的重要性，最近分歧类群之间的交配前隔离的研究，并建议交配后的障碍可能是由于postcopulatory-preozytic机制。D.蒙大拿州的人口似乎正在发展多种障碍，基因流动在异地和我们的研究奠定了基础，为未来的调查遗传和表型机制，这些障碍。
Widely distributed species with populations adapted to different environmental conditions can provide valuable opportunities for tracing the onset of reproductive incompatibilities and their role in the speciation process. Drosophila montana, a D. virilis group species found in high latitude boreal forests in Nearctic and Palearctic regions around the globe, could be an excellent model system for studying the early stages of speciation, as a wealth of information concerning this species' ecology, mating system, life history, genetics and phylogeography is available. However, reproductive barriers between populations have hereto not been investigated. We report both pre- and postmating barriers to reproduction between flies from European (Finnish) and North American (Canadian) populations of Drosophila montana. Using a series of mate-choice designs, we show that flies from these two populations mate assortatively (i.e., exhibit significant sexual isolation) while emphasizing the importance of experimental design in these kinds of studies. We also assessed potential postmating isolation by quantifying egg and progeny production in intra- and interpopulation crosses and show a significant one-way reduction in progeny production, affecting both male and female offspring equally. We provide evidence that allopatric D. montana populations exhibit reproductive isolation and we discuss the potential mechanisms involved. Our data emphasize the importance of experimental design in studies on premating isolation between recently diverged taxa and suggest that postmating barriers may be due to postcopulatory-prezygotic mechanisms. D. montana populations seem to be evolving multiple barriers to gene flow in allopatry and our study lays the groundwork for future investigations of the genetic and phenotypic mechanisms underlying these barriers.
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FlyBase：十几个基因组。
影响因子：
14.9
作者：
Crosby MA;Goodman JL;Strelets VB;Zhang P;Gelbart WM;FlyBase Consortium
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