Molecular phylogeny and diversification history of Prosopis (Fabaceae: Mimosoideae)
Molecular phylogeny and diversification history of Prosopis (Fabaceae: Mimosoideae)
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DOI：
10.1111/j.1095-8312.2007.00907.x
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发表时间：
2008-03-01
影响因子：
1.9
通讯作者：
Saidman, Beatriz Ofelia
中科院分区：
文献类型：
--
作者：
Catalano, Santiago Andres;Vilardi, Juan Cesar;Saidman, Beatriz Ofelia
Prosopis属是全球干旱、半干旱环境中的重要成员。本研究采用分子系统学、分子测年和性状优化分析相结合的方法，对原球藻的多样性和进化进行了研究。从5个不同的分子标记(matK-trnK、trnL-trnF、TRNS-PSBC、G3pdh、NIA)中推测了它们的系统发育关系。分类单元取样共涉及30个种，代表了该属的所有组和系列以及完整的地理范围。这些结果表明，Prosopis不是一个自然种群。分子测年分析表明，Stromburpa组和Algarobia组+Monilicarpa组之间的分歧发生在渐新世，与这些组中最近的多样化(晚中新世)形成对比。该类群的多样性始于上新世，表现出较高的多样性比率。美洲种的主要谱系内的多样化时刻与美洲干旱地区的扩张相吻合，这表明该种群的多样化受到气候控制。栖息地参数的优化表明，Prosopis物种在古代占据了干旱环境。(C)2008年伦敦林尼安协会。
The genus Prosopis is an important member of arid and semiarid environments around the world. To study Prosopis diversification and evolution, a combined approach including molecular phylogeny, molecular dating, and character optimization analysis was applied. Phylogenetic relationships were inferred from five different molecular markers (matK-trnK, trnL-trnF, trnS-psbC, G3pdh, NIA). Taxon sampling involved a total of 30 Prosopis species that represented all Sections and Series and the complete geographical range of the genus. The results suggest that Prosopis is not a natural group. Molecular dating analysis indicates that the divergence between Section Strombocarpa and Section Algarobia plus Section Monilicarpa occurred in the Oligocene, contrasting with a much recent diversification (Late Miocene) within each of these groups. The diversification of the group formed by species of Series Chilenses, Pallidae, and Ruscifoliae is inferred to have started in the Pliocene, showing a high diversification rate. The moment of diversification within the major lineages of American species of Prosopis is coincident with the spreading of arid areas in the Americas, suggesting a climatic control for diversification of the group. Optimization of habitat parameters suggests an ancient occupation of arid environments by Prosopis species. (c) 2008 The Linnean Society of London.