文摘：稀缺的花粉资源和不对称的生殖隔离。

IF 3.1 2区环境科学与生态学 Q2 ECOLOGY

Evolution Pub Date : 2024-12-22 DOI:10.1093/evolut/qpae156

Karin Gross

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引用次数: 0

摘要

是什么机制导致花柱长度不同的近缘物种之间杂交的繁殖成功率不对称？Feller 等人（2024 年）发现，在五个凤仙花物种中，短花柱物种产生的花粉粒比长花柱物种小。短花柱物种较小的花粉缺乏足够的资源来生长足够长的花粉管，以到达长花柱物种的胚珠。这种不对称的花粉长短不一可能会严重影响物种间的基因流动模式。

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Digest: Scarce pollen resources and asymmetric reproductive isolation.

What mechanisms cause asymmetries in reproductive success in crosses between closely related species that differ in floral style length? Feller et al. (2024) found that in 5 Phlox species, short-styled species produced smaller pollen grains than long-styled species. The smaller pollen of short-styled species lacked the resources to grow pollen tubes long enough to reach the ovules of long-styled species. This asymmetric pollen-style-length incompatibility may considerably affect patterns of gene flow among species.

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来源期刊

Evolution 环境科学-进化生物学

CiteScore

5.00

自引率

9.10%

发文量

审稿时长

3-6 weeks

期刊介绍： Evolution, published for the Society for the Study of Evolution, is the premier publication devoted to the study of organic evolution and the integration of the various fields of science concerned with evolution. The journal presents significant and original results that extend our understanding of evolutionary phenomena and processes.