Exceptionally high rates of positive selection on the rbcL gene in the genus Ilex (Aquifoliaceae)

doi:10.1186/s12862-019-1521-1

CORC > 西双版纳热带植物园 > 中国科学院西双版纳热带植物园 > 2012年后新成立研究组

	Exceptionally high rates of positive selection on the rbcL gene in the genus Ilex (Aquifoliaceae)
	Yao, Xin; Tan, Yun-hong; Yang, Jun-bo ; Wang, Yan 3; Corlett, Richard T.; Manen, Jean-Francois
刊名	BMC EVOLUTIONARY BIOLOGY
	2019
卷号	19 期号:1 页码:-
关键词	Rubisco Positive selection PALM Environmental adaptation Molecular adaptation
ISSN号	1471-2148
DOI	10.1186/s12862-019-1521-1
英文摘要	Background The genus Ilex (Aquifoliaceae) has a near-cosmopolitan distribution in mesic habitats from tropical to temperate lowlands and in alpine forests. It has a high rate of hybridization and plastid capture, and comprises four geographically structured plastid groups. A previous study showed that the plastid rbcL gene, coding for the large subunit of Rubisco, has a particularly high rate of non-synonymous substitutions in Ilex, when compared with other plant lineages. This suggests a strong positive selection on rbcL, involved in yet unknown adaptations. We therefore investigated positive selection on rbcL in 240 Ilex sequences from across the global range. Results The rbcL gene shows a much higher rate of positive selection in Ilex than in any other plant lineage studied so far (> 3000 species) by tests in both PAML and SLR. Most positively selected residues are on the surface of the folded large subunit, suggesting interaction with other subunits and associated chaperones, and coevolution between positively selected residues is prevalent, indicating compensatory mutations to recover molecular stability. Coevolution between positively selected sites to restore global stability is common. Conclusions This study has confirmed the predicted high incidence of positively selected residues in rbcL in Ilex, and shown that this is higher than in any other plant lineage studied so far. The causes and consequences of this high incidence are unclear, but it is probably associated with the similarly high incidence of hybridization and introgression in Ilex, even between distantly related lineages, resulting in large cytonuclear discordance in the phylogenies.
学科主题	Evolutionary Biology ; Genetics & Heredity
语种	英语
WOS记录号	WOS:000491865300002
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/11520]
专题	西双版纳热带植物园_2012年后新成立研究组
作者单位	1.Univ Geneva, Lab Systemat Vegetale & Biodiversite, Chemin Imperatrice 1, CH-1292 Chambesy, Switzerland 2.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 3.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Yunnan, Peoples R China 4.Chinese Acad Sci, Southeast Asia Biodivers Res Inst, Yezin, Nay Pyi Taw, Myanmar 5.Yao, Xin; Tan, Yun-hong; Corlett, Richard T.] Chinese Acad Sci, Ctr Conservat Biol, Core Bot Gardens, Mengla 666303, Peoples R China 6.[Yao, Xin; Tan, Yun-hong; Corlett, Richard T.] Chinese Acad Sci, Ctr Integrat Conservat, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Yao, Xin,Tan, Yun-hong,Yang, Jun-bo,et al. Exceptionally high rates of positive selection on the rbcL gene in the genus Ilex (Aquifoliaceae)[J]. BMC EVOLUTIONARY BIOLOGY,2019,19(1):-.
APA	Yao, Xin,Tan, Yun-hong,Yang, Jun-bo,Wang, Yan,Corlett, Richard T.,&Manen, Jean-Francois.(2019).Exceptionally high rates of positive selection on the rbcL gene in the genus Ilex (Aquifoliaceae).BMC EVOLUTIONARY BIOLOGY,19(1),-.
MLA	Yao, Xin,et al."Exceptionally high rates of positive selection on the rbcL gene in the genus Ilex (Aquifoliaceae)".BMC EVOLUTIONARY BIOLOGY 19.1(2019):-.