Phylogeography and population structure of the Dall's porpoise, Phocoenoides dalli, in Japanese waters revealed by mitochondrial DNA.
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- Hayano Azusa
- Department of Zoology, Graduate School of Science, Kyoto University
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- Amano Masao
- Otsuchi Marine Research Center, Ocean Research Institute, the University of Tokyo
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- Miyazaki Nobuyuki
- Otsuchi Marine Research Center, Ocean Research Institute, the University of Tokyo
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説明
We investigated genetic diversity and phylogenetic relationships among three morphologically distinct populations of Dall's porpoise (Phocoenoides dalli) in Japanese waters by analyzing mitochondrial DNA variation. These populations, the Sea of Japan-Okhotsk dalli-type population, the truei-type population and the standard dalli-type population in the northwestern North Pacific, are clearly discriminated from each other by differences in the size of their white flank patch. A total of 479 bp of the mitochondrial control region and flanking tRNA genes was sequenced for 103 individuals. Haplotypic diversity was high (h = 0.968), but these haplotypes differed by only a few nucleotides (π = 0.0106). Although many haplotypes were shared between populations, analysis of molecular variance (AMOVA) indicated genetic subdivision among the three populations (overall F ST = 0.023, P < 0.001; ΦST = 0.026, P = 0.029). Pairwise comparisons indicated a low but significant difference between the Sea of Japan-Okhotsk and the other two populations, whereas there was no significant difference between the latter. These results suggest that there is a close evolutionary relationship among these populations despite their consistent differences in coloration. This may reflect genetic polymorphism in the common ancestral population, which subsequently underwent a rapid divergence. The low genetic variability and haplotypic differentiation of the Sea of Japan-Okhotsk population suggest that it originated from a small population that colonized the Sea of Japan or that experienced population reduction when this Sea was isolated from the North Pacific in the last glacial period.<br>
収録刊行物
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- Genes & Genetic Systems
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Genes & Genetic Systems 78 (1), 81-91, 2003
日本遺伝学会
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詳細情報 詳細情報について
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- CRID
- 1390001205473300608
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- NII論文ID
- 130000060783
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- NII書誌ID
- AA11077421
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- COI
- 1:CAS:528:DC%2BD3sXjsl2ku7Y%3D
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- ISSN
- 18805779
- 13417568
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- NDL書誌ID
- 6474287
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- PubMed
- 12655140
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- JaLC
- NDLサーチ
- Crossref
- PubMed
- CiNii Articles
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- OpenAIRE
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- 使用不可