| Exceptionally high rates of positive selection on the rbcL gene in the genus Ilex (Aquifoliaceae) | |
Yao, Xin ; Tan, Yun-hong; Yang, Jun-bo; Wang, Yan4; Corlett, Richard T.; Manen, Jean-Francois
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| 2019 | |
| Source Publication | BMC EVOLUTIONARY BIOLOGY
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| ISSN | 1471-2148 |
| Volume | 19Issue:1Pages:- |
| Abstract | 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. |
| Keyword | Rubisco Positive selection PALM Environmental adaptation Molecular adaptation |
| Subject Area | Evolutionary Biology ; Genetics & Heredity |
| DOI | 10.1186/s12862-019-1521-1 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000491865300002 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/11520 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.[Yao, Xin; Tan, Yun-hong; Corlett, Richard T.] Chinese Acad Sci, Ctr Integrat Conservat, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 2.Yao, Xin; Tan, Yun-hong; Corlett, Richard T.] Chinese Acad Sci, Ctr Conservat Biol, Core Bot Gardens, Mengla 666303, Peoples R China 3.Chinese Acad Sci, Southeast Asia Biodivers Res Inst, Yezin, Nay Pyi Taw, Myanmar 4.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Yunnan, Peoples R China 5.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 6.Univ Geneva, Lab Systemat Vegetale & Biodiversite, Chemin Imperatrice 1, CH-1292 Chambesy, Switzerland |
| Recommended Citation 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):-. |
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