Convergent adaptation to a marginal habitat by homoploid hybrids and polyploid ecads in the seaweed genus Fucus
Convergent adaptation to a marginal habitat by homoploid hybrids and polyploid ecads in the seaweed genus Fucus
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DOI：
10.1098/rsbl.2006.0489
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发表时间：
2006-09-22
期刊：
影响因子：
3.3
通讯作者：
Olsen, Jeanine L.
中科院分区：
文献类型：
--
作者：
Coyer, James A.;Hoarau, Galice;Olsen, Jeanine L.
杂交和多倍体是遗传变异的两个主要来源，可以导致适应新的栖息地。褐藻属的大多数物种都在北半球海浪冲刷的岩石海岸发现，但有些物种已经适应了咸水和盐沼栖息地。利用五个微卫星位点和 mtDNA RFLP，我们对栖息在冰岛和爱尔兰盐沼中的两个形态相似、类粘蝇的墨角藻种群进行了表征。冰岛的基因型与墨角藻 x 墨角藻 F 不对称杂交的杂种一致，而爱尔兰的基因型主要由多倍体 F. vesiculosus 组成。
Hybridization and polyploidy are two major sources of genetic variability that can lead to adaptation in new habitats. Most species of the brown algal genus Fucus are found along wave-swept rocky shores of the Northern Hemisphere, but some species have adapted to brackish and salt marsh habitats. Using five microsatellite loci and mtDNA RFLP, we characterize two populations of morphologically similar, muscoideslike Fucus inhabiting salt marshes in Iceland and Ireland. The Icelandic genotypes were consistent with Fucus vesiculosus x Fucus spiralis F, hybrids with asymmetrical hybridization, whereas the Irish ones consisted primarily of polyploid F. vesiculosus.