加州麻花头复合体（菊科：向日葵族）中的土壤生态小种和系统发育类群：平行进化假说

Edaphic races and phylogenetic taxa in the Lasthenia californica complex (Asteraceae: Heliantheae): an hypothesis of parallel evolution.

作者信息

Rajakaruna Nishanta, Baldwin Bruce G, Chan Raymund, Desrochers Andrée M, Bohm Bruce A, Whitton Jeannette

机构信息

Department of Botany, University of British Columbia, 3529-6270 University Boulevard, Vancouver, BC, Canada V6T 1Z4.

出版信息

Mol Ecol. 2003 Jun;12(6):1675-9. doi: 10.1046/j.1365-294x.2003.01843.x.

DOI:10.1046/j.1365-294x.2003.01843.x

PMID:12755895

Abstract

Lasthenia californica sensu Ornduff consists of two races that differ in their flavonoid pigments and edaphic tolerances. Recent phylogenetic studies of Lasthenia have revealed that members of L. californica sensu Ornduff belong to two phylogenetic species. The relationship of the edaphic races to these new species and to each other is the focus of this study. Characterization of flavonoid profiles and phylogenetic placement of 33 populations demonstrates that races and phylogenetic taxa are not concordant, suggesting that one or both edaphic races evolved in parallel in the two clades. We hypothesize an edaphically linked ecological role for flavonoid differences that first revealed the existence of two races.

摘要

按照奥恩达夫（Ornduff）的界定，加州千金芥（Lasthenia californica）由两个族组成，它们在黄酮类色素和土壤耐受性方面存在差异。最近对加州千金芥的系统发育研究表明，奥恩达夫所界定的加州千金芥成员属于两个系统发育种。土壤族与这些新物种之间以及它们彼此之间的关系是本研究的重点。对33个种群的黄酮类化合物谱特征分析和系统发育定位表明，族和系统发育类群并不一致，这表明一个或两个土壤族在两个进化枝中平行进化。我们推测，黄酮类化合物差异具有与土壤相关的生态作用，这一差异首先揭示了两个族的存在。