Separation in flowering time contributes to the maintenance of sympatric cryptic plant lineages
Separation in flowering time contributes to the maintenance of sympatric cryptic plant lineages
复制标题
开花时间的分离有助于维持同域隐秘植物谱系
作者：
S. Michalski;W. Durka
同域隐性谱系对于理解物种共存和谱系多样性以及植物遗传资源的管理、保护和利用都是一个挑战。在高等植物中，对同域隐系形成和维持机制的研究很少。在这里，使用微卫星和叶绿体序列数据，形态分析和物候观测，我们问是否在共同的湿地植物灯心草生态分化和生殖隔离共域共存的谱系。我们的研究结果表明，两个遗传高度分化，同源倍体谱系内J. effusus的形态隐藏，并有类似的偏好土壤水分含量。然而，开花时间显着不同的血统之间的生殖隔离和维护这些血统。此外，后来开花的血统遭受predispensal种子捕食的鞘蛾物种。尽管如此，我们还是检测到了两个谱系和早期开花谱系与J. conglomeratus（一种共存的近亲）之间的可行和繁殖杂交种。开花时间之间的分化的血统可以解释单独的中性分歧，并与缺乏后合子隔离机制，这些血统的同域共存是最有可能的结果，异地起源与二次接触。
Sympatric cryptic lineages are a challenge for the understanding of species coexistence and lineage diversification as well as for management, conservation, and utilization of plant genetic resources. In higher plants studies providing insights into the mechanisms creating and maintaining sympatric cryptic lineages are rare. Here, using microsatellites and chloroplast sequence data, morphometric analyses, and phenological observations, we ask whether sympatrically coexisting lineages in the common wetland plant Juncus effusus are ecologically differentiated and reproductively isolated. Our results show two genetically highly differentiated, homoploid lineages within J. effusus that are morphologically cryptic and have similar preference for soil moisture content. However, flowering time differed significantly between the lineages contributing to reproductive isolation and the maintenance of these lineages. Furthermore, the later flowering lineage suffered less from predispersal seed predation by a Coleophora moth species. Still, we detected viable and reproducing hybrids between both lineages and the earlier flowering lineage and J. conglomeratus, a coexisting close relative. Flowering time differentiation between the lineages can be explained by neutral divergence alone and together with a lack of postzygotic isolation mechanisms; the sympatric coexistence of these lineages is most likely the result of an allopatric origin with secondary contact.
DOI：
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发表时间：
2015-10
期刊：
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影响因子：
--
作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker
通讯作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker
使用多位点基因型数据推断群体结构：连锁位点和相关等位基因频率。
影响因子：
3.3
作者：
Falush,Daniel;Stephens,Matthew;Pritchard,JonathanK
通讯作者：
Pritchard,JonathanK
新热带藤本植物Pedersenia（苋科：Gomphrenoideae）的系统发育和基于分子和形态学的玻利维亚新种发现
DOI：
10.3372/wi.41.41101
发表时间：
2011
期刊：
影响因子：
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作者：
Borsch T;Ortuño Limarino T. ;Nee M. H.
通讯作者：
Nee M. H.