Evolution and diversification within the intertidal brown macroalgae Fucus spiralis/F. vesiculosus species complex in the North Atlantic
Evolution and diversification within the intertidal brown macroalgae Fucus spiralis/F. vesiculosus species complex in the North Atlantic
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DOI：
10.1016/j.ympev.2010.11.015
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发表时间：
2011-02-01
影响因子：
4.1
通讯作者：
Olsen, J. L.
中科院分区：
文献类型：
--
作者：
Coyer, J. A.;Hoarau, G.;Olsen, J. L.
我们研究了733个个体的墨角藻螺旋21个地点和1093墨角藻泡状个体从37个地点在整个北方半球范围内使用核和线粒体标记。F.螺旋体已恢复。在北方和同域分布的种群中，F. spiralis Low”在潮间中部; spiralis High”的发现，并与姐妹种F.囊状的第三个也是新发现的实体，F。spiralis South”主要分布在南部，与F.囊状的南方实体在异地分布中早期分化，然后与F. vesiculosus共域繁殖产生F.螺旋藻F. spiralis Low和F. spiralis High最有可能是由于生境偏好/本地选择，并通过优先自交繁殖策略来维持。当代F. spiralis在整个北大西洋源于一个冰川避难所周围布列塔尼涉及F. spiralis High;螺旋藻F. spiralis南部可能没有受到冰川事件的影响。F.种群的指数增长。vesiculosus开始于Cromer和/Holstein间冰期（300，000 - 200，000年BP）。在末次盛冰期（距今30，000 - 22，000年）之后，来自西南部爱尔兰冰川避难所的单个mtDNA单倍型在斯堪的纳维亚、中大西洋岛屿和西大西洋殖民。(C)2010年爱思唯尔公司All rights reserved.
We examined 733 individuals of Fucus spiralis from 21 locations and 1093 Fucus vesiculosus individuals from 37 locations throughout their northern hemisphere ranges using nuclear and mitochondrial markers. Three genetic entities of F. spiralis were recovered. In northern and sympatric populations, the presence of "F. spiralis Low" in the mid-intertidal and "F. spiralis High" in the high-intertidal was confirmed and both co-occurred with the sister species F. vesiculosus. The third and newly-discovered entity, F. spiralis South", was present mainly in the southern range, where it did not co-occur with F. vesiculosus. The South entity diverged early in allopatry, then hybridized with F. vesiculosus in sympatry to produce F. spiralis Low. Ongoing parallel evolution of F. spiralis Low and F. spiralis High is most likely due to habitat preference/local selection and maintained by preferentially selfing reproductive strategies. Contemporary populations of F. spiralis throughout the North Atlantic stem from a glacial refugium around Brittany involving F. spiralis High; F. spiralis South was probably unaffected by glacial episodes. Exponential population expansion for F. vesiculosus began during the Cromer and/Holstein interglacial period (300,000-200,000 yrs BP). Following the last glacial maximum (30,000-22,000 yrs BP), a single mtDNA haplotype from a glacial refugium in SW Ireland colonized Scandinavia, the Central Atlantic islands, and the W Atlantic. (C) 2010 Elsevier Inc. All rights reserved.