Unusual patterns of hybridization involving two alpine Salvia species: Absence of both F-1 and backcrossed hybrids

doi:10.3389/fpls.2022.1010577

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	Unusual patterns of hybridization involving two alpine Salvia species: Absence of both F-1 and backcrossed hybrids
	Chang, Yuhang; Zhao, Shengxuan; Xiao, Hanwen; Liu, Detuan; Huang, Yanbo; Wei, Yukun; Ma, Yongpeng
	2022
发表期刊	FRONTIERS IN PLANT SCIENCE
卷号	13 页码:1010577
摘要	Natural hybridization plays an important role in speciation; however, we still know little about the mechanisms underlying the early stages of hybrid speciation. Hybrid zones are commonly dominated by F(1)s, or backcrosses, which impedes further speciation. In the present study, morphological traits and double digest restriction-site associated DNA sequencing (ddRAD-seq) data have been used to confirm natural hybridization between Salvia flava and S. castanea, the first case of identification of natural hybridization using combined phenotypic and molecular evidence in the East Asian clade of Salvia. We further examined several reproductive barriers in both pre-zygotic and post-zygotic reproductive stages to clarify the causes and consequences of the hybridization pattern. Our results revealed that reproductive isolation between the two species was strong despite the occurrence of hybridization. Interestingly, we found that most of the hybrids were likely to be F(2)s. This is a very unusual pattern of hybridization, and has rarely been reported before. The prevalence of geitonogamy within these self-compatible hybrids due to short distance foraging by pollinators might explain the origin of this unusual pattern. F(2)s can self-breed and develop further, therefore, we might be witnessing the early stages of hybrid speciation. Our study provides a new case for understanding the diversification of plants on the Qinghai-Tibet Plateau.
关键词	hybridization Salvia RAD-seq speciation reproductive isolation barriers ethological isolation REPRODUCTIVE ISOLATION POLLINATION BIOLOGY STAMINAL EVOLUTION YUNNAN INTROGRESSION ERICACEAE LAMIACEAE BARRIERS ORIGINS F(1)S
DOI	10.3389/fpls.2022.1010577
收录类别	SCI
WOS记录号	WOS:000878548600001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75639
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Chang, Yuhang,Zhao, Shengxuan,Xiao, Hanwen,et al. Unusual patterns of hybridization involving two alpine Salvia species: Absence of both F-1 and backcrossed hybrids[J]. FRONTIERS IN PLANT SCIENCE,2022,13:1010577.
APA	Chang, Yuhang.,Zhao, Shengxuan.,Xiao, Hanwen.,Liu, Detuan.,Huang, Yanbo.,...&Ma, Yongpeng.(2022).Unusual patterns of hybridization involving two alpine Salvia species: Absence of both F-1 and backcrossed hybrids.FRONTIERS IN PLANT SCIENCE,13,1010577.
MLA	Chang, Yuhang,et al."Unusual patterns of hybridization involving two alpine Salvia species: Absence of both F-1 and backcrossed hybrids".FRONTIERS IN PLANT SCIENCE 13(2022):1010577.

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