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Patterns of style polymorphism in five species of the South African genus Nivenia (Iridaceae)

机译:南非Nivenia(鸢尾科)的五个物种的样式多态性模式

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摘要

Background and AimsHeterostylous plants have been characterized by the presence of two or three discrete morphs that differ in their sex organ position within populations. This polymorphism is widely distributed among the angiosperms, but detailed studies are limited to few taxonomic groups. Although a small representation, evolutionary meaningful variations of the heterostylous syndrome have been reported when precise measurements of the sexual whorls were taken. A thorough exploration of groups where heterostyly has been reported should offer new opportunities to further testing the evolutionary hypotheses explaining heterostyly. Here, the traits defining heterostyly were explored in half of the species in Nivenia, the only genus of Iridiaceae where heterostyly has been reported.
机译:背景和目的杂种植物的特征是存在两种或三种在种群中性器官位置不同的离散形态。这种多态性在被子植物中广泛分布,但是详细的研究仅限于几个分类组。尽管只占很小的一部分,但是当精确测量性轮动时,已经报告了异位综合征的进化意义。对报告了异质性的群体进行彻底的探索应该为进一步检验解释异质性的进化假设提供新的机会。在这里,在尼维尼亚的一半物种中发现了定义异位的性状,这是鸢尾科唯一报道异位的属。

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