Phylogenetic relationships of Salix (Salicaceae) based on rbcL sequence data
Phylogenetic relationships of Salix (Salicaceae) based on rbcL sequence data
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DOI：
10.2307/2656686
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发表时间：
2000-01-01
影响因子：
3
通讯作者：
Ohashi, H
中科院分区：
文献类型：
--
作者：
Azuma, T;Kajita, T;Ohashi, H
利用叶绿体编码的rbcL基因的核苷酸序列分析了柳属与杨柳科其他近缘属的系统发育关系。系统发育分析的rbcL，序列强烈建议单系的三个常见的公认的属（Chosenia，柳，和Toisusu）。在较大的单系群中，有两个单系群。他们不符合任何下属分类群提出迄今为止。关于性状的进化，认为雄蕊数从多于两个雄蕊减少到两个雄蕊可能至少发生在三个谱系中，并且融合的芽鳞发生了多次进化和/或发生了从融合到游离的逆进化。有些类型的花粉表面被认为是独立进化的。
Nucleotide sequences of the chloroplast-encoded rbcL gene were used to examine phylogenetic relationships of the genus Salix together with other allied genera of the family Salicaceae. Phylogenetic analyses of rbcL, sequences strongly suggest the monophyly of three commonly recognized genera (Chosenia, Salix, and Toisusu). Two monophyletic groups are recognized within the larger monophyletic group. They do not correspond with any infrageneric taxa proposed so far. With regard to character evolution, it is thought that the reduction of stamen number from more than two stamens to two might occur in at least three lineages and that fused bud scales evolved several times and/or the reverse evolution occurred from fused to free. Some types of pollen surfaces are considered to have evolved independently.