Inferring the geographic mode of speciation by contrasting autosomal and sex-linked genetic diversity

Jui Hua Chu, Daniel Wegmann, Chia Fen Yeh, Rong Chien Lin, Xiao Jun Yang, Fu Min Lei, Cheng Te Yao, Fa Sheng Zou, Shou Hsien Li

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

When geographic isolation drives speciation, concurrent termination of gene flow among genomic regions will occur immediately after the formation of the barrier between diverging populations. Alternatively, if speciation is driven by ecologically divergent selection, gene flow of selectively neutral genomic regions may go on between diverging populations until the completion of reproductive isolation. It may also lead to an unsynchronized termination of gene flow between genomic regions with different roles in the speciation process. Here, we developed a novel Approximate Bayesian Computation pipeline to infer the geographic mode of speciation by testing for a lack of postdivergence gene flow and a concurrent termination of gene flow in autosomal and sex-linked markers jointly. We applied this approach to infer the geographic mode of speciation for two allopatric highland rosefinches, the vinaceous rosefinch Carpodacus vinaceus and the Taiwan rosefinch C. formosanus from DNA polymorphisms of both autosomal and Z-linked loci. Our results suggest that the two rosefinch species diverged allopatrically approximately 0.5 Ma. Our approach allowed us further to infer that female effective population sizes are about five times larger than those of males, an estimate potentially useful when comparing the intensity of sexual selection across species.

Original languageEnglish
Pages (from-to)2519-2530
Number of pages12
JournalMolecular Biology and Evolution
Volume30
Issue number11
DOIs
Publication statusPublished - 2013 Nov 1

Fingerprint

Gene Flow
gene flow
genetic variation
gender
genomics
Reproductive Isolation
effective population size
reproductive isolation
Population Density
sexual selection
Taiwan
Population
highlands
polymorphism
population size
genetic diversity
genetic polymorphism
DNA
loci
testing

Keywords

  • Allopatric speciation
  • Approximate bayesian computation
  • Carpodacus formosanus
  • Carpodacus vinaceus

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics

Cite this

Inferring the geographic mode of speciation by contrasting autosomal and sex-linked genetic diversity. / Chu, Jui Hua; Wegmann, Daniel; Yeh, Chia Fen; Lin, Rong Chien; Yang, Xiao Jun; Lei, Fu Min; Yao, Cheng Te; Zou, Fa Sheng; Li, Shou Hsien.

In: Molecular Biology and Evolution, Vol. 30, No. 11, 01.11.2013, p. 2519-2530.

Research output: Contribution to journalArticle

Chu, JH, Wegmann, D, Yeh, CF, Lin, RC, Yang, XJ, Lei, FM, Yao, CT, Zou, FS & Li, SH 2013, 'Inferring the geographic mode of speciation by contrasting autosomal and sex-linked genetic diversity', Molecular Biology and Evolution, vol. 30, no. 11, pp. 2519-2530. https://doi.org/10.1093/molbev/mst140
Chu, Jui Hua ; Wegmann, Daniel ; Yeh, Chia Fen ; Lin, Rong Chien ; Yang, Xiao Jun ; Lei, Fu Min ; Yao, Cheng Te ; Zou, Fa Sheng ; Li, Shou Hsien. / Inferring the geographic mode of speciation by contrasting autosomal and sex-linked genetic diversity. In: Molecular Biology and Evolution. 2013 ; Vol. 30, No. 11. pp. 2519-2530.
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