干旱区生态环境知识资源中心(Arid): Transcriptomic comparison to identify rapidly evolving genes in Braya humilis

Arid

	Transcriptomic comparison to identify rapidly evolving genes in Braya humilis
	Wei Yuming; Ma Xiaofei; Zhao Pengshan
来源期刊	Sciences in Cold and Arid Regions
ISSN	1674-3822
出版年	2018
卷号	10 期号:5 页码:428-435
英文摘要	The Brassicaceae species Braya humilis shows broad adaptation to different climatic zones and latitudes. However, the molecular adaptation mechanism of B. humilis is poorly understood. In China, B. humilis is mainly distributed on the Qinghai-Tibetan Plateau (QTP) and in the adjacent arid region. Previous transcriptome analysis of B. humilis has revealed that 39 salt and osmotic stress response genes are subjected to purifying selection during its speciation. To further explore the adaptation mechanism of B. humilis to an arid environment, OrthoMCL program was employed in this study and 6,268 pairs of orthologous gene pairs with high confidence were obtained between B. humilis and Arabidopsis thaliana. A comparative evolutionary analysis based on nonsynonymous to synonymous substitution ratio (Ka/Ks) was then conducted. There were 64 pairs exhibiting a Ka/Ks ratio more than 0.5 and among which, three instrumental candidate genes, T2_20487, T2_22576, and T2_13757, were identified with strong selection signatures (Ka/Ks >1). The corresponding A. thaliana orthologs are double-stranded RNA-binding domain protein, MADS-box family protein, and NADH-dehydrogenase subunit 6, which is encoded by mitochondria genome. This report not only demonstrates the adaptation contribution of fast evolving nuclear genes, but also highlights the potential adaptive value of mitochondria gene to the speciation and adaptation of B. humilis toward the extreme environment in an arid region.
英文关键词	Braya humilis positive selection Ka/Ks mitochondria gene variation NADH-dehydrogenase subunit 6
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6357954
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336030
作者单位	Wei Yuming, Animal Husbandry Pasture and Green Agriculture Institute of Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China.; Ma Xiaofei, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Zhao Pengshan, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
推荐引用方式 GB/T 7714	Wei Yuming,Ma Xiaofei,Zhao Pengshan. Transcriptomic comparison to identify rapidly evolving genes in Braya humilis[J],2018,10(5):428-435.
APA	Wei Yuming,Ma Xiaofei,&Zhao Pengshan.(2018).Transcriptomic comparison to identify rapidly evolving genes in Braya humilis.Sciences in Cold and Arid Regions,10(5),428-435.
MLA	Wei Yuming,et al."Transcriptomic comparison to identify rapidly evolving genes in Braya humilis".Sciences in Cold and Arid Regions 10.5(2018):428-435.