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Multilocus approaches reveal underestimated species diversity and inter-specific gene flow in pikas (Ochotona) from southwestern China.

Abstract：

:The phylogeny of living pikas (Ochotonidae, Ochotona) remains obscure, and pika species diversity in southwestern China has never been well explored. In this study, 96 tissue samples from 11 valid species in three classified subgenera (Pika, Ochotona and Conothoa) from 23 locations were characterized using multilocus sequences of 7031bp. Two mitochondrial (CYT B and COI) and five nuclear gene segments (RAG1, RAG2, TTN, OXAIL and IL1RAPL1) were sequenced. We analysed evolutionary histories using maximum likelihood (RAxML) and Bayesian analyses (BEAST), and we also used molecular species delimitation analyses (BPP) to explore species diversity. Our study supported O. syrinx (O. huangensis) as a distinct clade from all named subgenera. Relationships among subgenera were not fully resolved, which may be due to a rapid diversification in the middle Miocene (∼13.90Ma). Conflicting gene trees implied mitochondrial introgression from O. cansus to O. curzoniae. We uncovered three cryptic species from Shaanxi, Sichuan and Yunnan with strong support, suggesting an underestimation of species diversity in the "sky-island" mountains of southwest China.

journal_name

Mol Phylogenet Evol

journal_title

Molecular phylogenetics and evolution

authors

Koju NP,He K,Chalise MK,Ray C,Chen Z,Zhang B,Wan T,Chen S,Jiang X

doi

10.1016/j.ympev.2016.11.005

subject

Has Abstract

pub_date

2017-02-01 00:00:00

pages

239-245

eissn

1055-7903

issn

1095-9513

pii

S1055-7903(16)30329-3

journal_volume

107

pub_type

杂志文章

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