4.0 Article

Introgressive Hybridization between Southern Asian Dolly Varden, Salvelinus curilus, and Northern Dolly Varden, S. malma malma, on Sakhalin Island

期刊

RUSSIAN JOURNAL OF GENETICS
卷 57, 期 3, 页码 361-370

出版社

PLEIADES PUBLISHING INC
DOI: 10.1134/S1022795421030145

关键词

genetic admixture; microsatellite DNA; mitochondrial DNA; secondary contact

资金

  1. JSPS KAKENHI [16K07884]
  2. Grants-in-Aid for Scientific Research [16K07884] Funding Source: KAKEN

向作者/读者索取更多资源

The study revealed inconsistent genetic characteristics between the southern Asian Dolly Varden and northern Dolly Varden populations on Sakhalin Island, indicating historical mtDNA introgression. This suggests that introgressive hybridization may have been caused by postglacial colonization from different refugia.
Genetic characteristics of the southern Asian Dolly Varden, Salvelinus curilus, and northern Dolly Varden, S. malma malma, in northeastern Asia and the Aleutian Islands were examined using mitochondrial (mt) and microsatellite (ms) DNA markers. The maximum-likelihood tree based on mtDNA control region haplotypes showed two well-supported monophyletic lineages for these species, but the haplotypes found in the Sakhalin Island populations were an admixture of the two mtDNA lineages. Bayesian clustering using msDNA indicated that all individuals from Sakhalin Island grouped with the S. curilus populations, regardless of their mtDNA haplotype. Incongruence between mtDNA and msDNA markers provided strong evidence of historical mtDNA introgression from S. m. malma to S. curilus. Secondary contact by postglacial colonization from different refugia is a plausible explanation for the introgressive hybridization detected in Sakhalin Island.

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