Bursts of Rapid Diversification, Dispersals Out of Southern Africa, and Two Origins of Dioecy Punctuate the Evolution of Asparagus

doi:10.1093/gbe/evae200

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	Bursts of Rapid Diversification, Dispersals Out of Southern Africa, and Two Origins of Dioecy Punctuate the Evolution of Asparagus
	Bentz, Philip C.; Burrows, John E.; Burrows, Sandra M.; Mizrachi, Eshchar; Liu, Zhengjie; Yang, Junbo; Mao, Zichao; Popecki, Margot; Seberg, Ole; Petersen, Gitte; Leebens-Mack, Jim
	2024
发表期刊	GENOME BIOLOGY AND EVOLUTION
ISSN	1759-6653
卷号	16 期号:10 页码:evae200
摘要	The genus Asparagus arose similar to 9 to 15 million years ago (Ma), and transitions from hermaphroditism to dioecy (separate sexes) occurred similar to 3 to 4 Ma. Roughly 27% of extant Asparagus species are dioecious, while the remaining are bisexual with monoclinous flowers. As such, Asparagus is an ideal model taxon for studying the early stages of dioecy and sex chromosome evolution in plants. Until now, however, understanding of diversification and shifts from hermaphroditism to dioecy in Asparagus has been hampered by the lack of robust species tree estimates for the genus. In this study, a genus-wide phylogenomic analysis including 1,726 nuclear loci and comprehensive species sampling supports two independent origins of dioecy in Asparagus-first in a widely distributed Eurasian clade and then in a clade restricted to the Mediterranean Basin. Modeling of ancestral biogeography indicates that both dioecy origins were associated with range expansion out of southern Africa. Our findings also reveal several bursts of diversification across the phylogeny, including an initial radiation in southern Africa that gave rise to 12 major clades in the genus, and more recent radiations that have resulted in paraphyly and polyphyly among closely related species, as expected given active speciation processes. Lastly, we report that the geographic origin of domesticated garden asparagus (Asparagus officinalis L.) was likely in western Asia near the Mediterranean Sea. The presented phylogenomic framework for Asparagus is foundational for ongoing genomic investigations of diversification and functional trait evolution in the genus and contributes to its utility for understanding the origin and early evolution of dioecy and sex chromosomes.
DOI	10.1093/gbe/evae200
WOS记录号	WOS:001335036700001
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75956
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Bentz, Philip C.,Burrows, John E.,Burrows, Sandra M.,et al. Bursts of Rapid Diversification, Dispersals Out of Southern Africa, and Two Origins of Dioecy Punctuate the Evolution of Asparagus[J]. GENOME BIOLOGY AND EVOLUTION,2024,16(10):evae200.
APA	Bentz, Philip C..,Burrows, John E..,Burrows, Sandra M..,Mizrachi, Eshchar.,Liu, Zhengjie.,...&Leebens-Mack, Jim.(2024).Bursts of Rapid Diversification, Dispersals Out of Southern Africa, and Two Origins of Dioecy Punctuate the Evolution of Asparagus.GENOME BIOLOGY AND EVOLUTION,16(10),evae200.
MLA	Bentz, Philip C.,et al."Bursts of Rapid Diversification, Dispersals Out of Southern Africa, and Two Origins of Dioecy Punctuate the Evolution of Asparagus".GENOME BIOLOGY AND EVOLUTION 16.10(2024):evae200.

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