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| Title | : | 日本の砂浜に生息するチョウセンハマグリ集団の遺伝的多様性と集団構造 |
| Title alternative | : | Genetic diversity and population structure of Meretrix lamarckii from a Japanese sandy beach |
| Authors | : | 山川, 矢敷 彩子
今井, 秀行 |
| Authors alternative | : | Yamakawa, Ayako Yashiki
Imai, Hideyuki |
| Issue Date | : | 20-Dec-2014 |
| Abstract | : | Genetic diversity at 14 allozyme loci was examined for 12 local samples of
Meretrix lamarckii from mainland Japan, an adjacent island (Tanegashima), and one
sample of Meretrix sp1. collected from Iriomote Island. An unweighted pair group method
with arithmetic mean (UPGMA) dendrogram of Nei’s D showed three geographical
clusters; the Pacific Ocean, the Sea of Japan and Tanegashima. Two warm currents,
the Kuroshio and Tsushima, play an important role in the differentiation of the genetic
structure between the Pacific Ocean and the Sea of Japan. M. lamarckii inhabit the surf
zone on exposed sandy beaches, and frequent gene flow between localities was predicted.
However, the pairwise Fst results revealed genetically significant differences among
Japanese M. lamarckii populations; the Tanegashima, Wakimoto (Kagoshima Pref.),
Masuda (Shimane Pref.) and Chiribama (Ishikawa Pref.) populations were genetically
independent. This is due to the relatively shorter planktonic larval period (5-10 days) of
M. lamarckii compared to other bivalves (2-4 weeks). No significant genetic differences
were observed among the Okuragahama (Miyazaki Pref.), Katakai (Kujyukurihama),
Ooarai (Kashimanada), Akasaki and Nagasuga (Miyagi Pref.) populations. These results
suggest that gene flow among the four northern Honshu populations was enabled by the
warm Tsugaru current flowing north to south. In contrast, genetic similarities between
the Okuragahama (Miyazaki Pref.) and the four northern Honshu populations was due to
accumulated seedling releases (from Kashimanada to Okuragahama), and not gene flow
caused by ocean currents. |
| Type Local | : | 雑誌掲載論文 |
| ISSN | : | 0067-8716 |
| Publisher | : | 日本生物地理学会 |
| URI | : | http://hdl.handle.net/20.500.12000/37566 |
| Citation | : | 日本生物地理学会会報 = Bulletin of the Bio-geographical Society of Japan Vol.69 p.143 -160 |
| Appears in Collections | : | Peer-reviewed Journal Articles (Faculty of Science)
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