Incomplete lineage sorting and secondary admixture results in the paraphyly of Lecanorchis cerina, L. suginoana, and L. thalassica (Orchidaceae) in Taiwan

Shih Ying Hwang*, Yi Shao Li, Tsan Piao Lin

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Inferring the evolutionary history of a group of closely related species can be challenging. Genetic diversity, structure, and multilocus phylogeny were studied to shed light on the evolutionary processes that shapes diversity in three closely related Lecanorchis species (L. cerina, L. suginoana, and L. thalassica). In this study, we surveyed nucleotide and genetic variation, respectively, using nuclear internal transcribed spacer 1 (nrITS1) and amplified fragment length polymorphism (AFLP) in individuals of Lecanorchis species. Both nrITS1 parsimonious and AFLP neighbor-joining trees showed paraphyly indicated that lineage sorting for these species may be incomplete. ITS1 haplotype sharing was found within L. cerina, within L. suginoana, and between L. suginoana and L. thalassica. Higher AFLP diversity was observed in L. cerina than that in L. suginoana and in L. thalassica, indicating larger population size in L. cerina. Two contrasting patterns of AFLP genetic differentiation between geographic neighbors relative to geographic distant populations were observed. Two major AFLP genetic components were found in individuals of Lecanorchis species examined. Individuals of L. cerina and of L. thalassica were classified into either component with high probabilities. Most individuals of L. suginoana were classified into one of these components, but two individuals showed apparent admixture of these components. The evidence of paraphyly, haplotype sharing, higher L. cerina diversity, sharing and admixture of genetic components, and the contrasting patterns of genetic differentiation suggest that both incomplete lineage sorting and secondary gene flow could have occurred in these closely related species, though at different temporal scale.

原文英語
頁(從 - 到)366-376
頁數11
期刊Taiwania
67
發行號3
DOIs
出版狀態已發佈 - 2022 7月 6

ASJC Scopus subject areas

  • 生態學、進化論、行為學與系統學
  • 生態學

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