Reproductive isolation is mediated by pollen incompatibility in sympatric populations of two Arnebia species

doi:10.1002/ece3.1849

	Reproductive isolation is mediated by pollen incompatibility in sympatric populations of two Arnebia species
	Wang, Lin-Lin; Zhang, Chan; Tian, Bin; Sun, Xu-Dong; Guo, Wen; Zhang, Ting-Feng; Yang, Yong-Ping; Duan, Yuan-Wen
	2015-12-01
发表期刊	ECOLOGY AND EVOLUTION
卷号	5 期号:24 页码:S838-S846
摘要	To explore uncertain aspects of the processes that maintain species boundaries, we evaluated contributions of pre- and postpollination reproductive isolation mechanisms in sympatric populations of Arnebia guttata and A. szechenyi. For this, we investigated their phylogenetic relationships, traits, microenvironments, pollinator visits, action of natural selection on floral traits, and the outcome of hand pollination between the two species. Phylogenetic analysis indicates that A. szechenyi is a derived species that could be closely related to A. guttata, and both could be diploid species. Arnebia guttata flowers have larger parts than A. szechenyi flowers, but smaller nectar guides. Soil supporting A. szechenyi had higher water contents than soil supporting neighboring populations of A. guttata (in accordance with their geographical distributions). The pollinators shared by the two species preferred A. szechenyi flowers, but interspecific visitations were frequent. We found evidence of conflicting selection pressures on floral tube length, flower diameter and nectar guide size mediated via male fitness, and on flower diameter and floral tube diameter via female fitness. Hand-pollination experiments indicate complete pollen incompatibility between the two species. Our results suggest that postpollination prezygotic mechanisms are largely responsible for reproductive isolation of sympatric populations of the two Arnebia species.
关键词	Floral Traits Natural Selection Pollen Export Pollinator Preference Seed Set
DOI	10.1002/ece3.1849
收录类别	SCI
语种	英语
WOS记录号	WOS:000368136600009
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/25449
专题	中国科学院东亚植物多样性与生物地理学重点实验室
推荐引用方式 GB/T 7714	Wang, Lin-Lin,Zhang, Chan,Tian, Bin,et al. Reproductive isolation is mediated by pollen incompatibility in sympatric populations of two Arnebia species[J]. ECOLOGY AND EVOLUTION,2015,5(24):S838-S846.
APA	Wang, Lin-Lin.,Zhang, Chan.,Tian, Bin.,Sun, Xu-Dong.,Guo, Wen.,...&Duan, Yuan-Wen.(2015).Reproductive isolation is mediated by pollen incompatibility in sympatric populations of two Arnebia species.ECOLOGY AND EVOLUTION,5(24),S838-S846.
MLA	Wang, Lin-Lin,et al."Reproductive isolation is mediated by pollen incompatibility in sympatric populations of two Arnebia species".ECOLOGY AND EVOLUTION 5.24(2015):S838-S846.

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