Positive selection and relaxed purifying selection contribute to rapid evolution of male-biased genes in a dioecious flowering plant

doi:10.7554/eLife.89941

KIB OpenIR

	Positive selection and relaxed purifying selection contribute to rapid evolution of male-biased genes in a dioecious flowering plant
	Zhao, Lei; Zhou, Wei; He, Jun; Li, De-Zhu; Li, Hong-Tao
	2024
发表期刊	ELIFE
ISSN	2050-084X
卷号	12 页码:RP89941
摘要	Sex-biased genes offer insights into the evolution of sexual dimorphism. Sex-biased genes, especially those with male bias, show elevated evolutionary rates of protein sequences driven by positive selection and relaxed purifying selection in animals. Although rapid sequence evolution of sex-biased genes and evolutionary forces have been investigated in animals and brown algae, less is known about evolutionary forces in dioecious angiosperms. In this study, we separately compared the expression of sex-biased genes between female and male floral buds and between female and male flowers at anthesis in dioecious Trichosanthes pilosa (Cucurbitaceae). In floral buds, sex-biased gene expression was pervasive, and had significantly different roles in sexual dimorphism such as physiology. We observed higher rates of sequence evolution for male-biased genes in floral buds compared to female-biased and unbiased genes. Male-biased genes under positive selection were mainly associated with functions to abiotic stress and immune responses, suggesting that high evolutionary rates are driven by adaptive evolution. Additionally, relaxed purifying selection may contribute to accelerated evolution in male-biased genes generated by gene duplication. Our findings, for the first time in angiosperms, suggest evident rapid evolution of male-biased genes, advance our understanding of the patterns and forces driving the evolution of sexual dimorphism in dioecious plants.
DOI	10.7554/eLife.89941
WOS记录号	WOS:001162881600001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/76347
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Zhao, Lei,Zhou, Wei,He, Jun,et al. Positive selection and relaxed purifying selection contribute to rapid evolution of male-biased genes in a dioecious flowering plant[J]. ELIFE,2024,12:RP89941.
APA	Zhao, Lei,Zhou, Wei,He, Jun,Li, De-Zhu,&Li, Hong-Tao.(2024).Positive selection and relaxed purifying selection contribute to rapid evolution of male-biased genes in a dioecious flowering plant.ELIFE,12,RP89941.
MLA	Zhao, Lei,et al."Positive selection and relaxed purifying selection contribute to rapid evolution of male-biased genes in a dioecious flowering plant".ELIFE 12(2024):RP89941.

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