2013 Fiscal Year Final Research Report
Effects of population dynamics and dispersal on the formation of spatial genetic structure in gray-sided vole populations
| Project/Area Number |
22370006
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | Hokkaido University |
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Principal Investigator |
SAITOH TAKASHI 北海道大学, 北方生物圏フィールド科学センター, 教授 (00183814)
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| Co-Investigator(Kenkyū-buntansha) |
KISHIDA Osamu 北海道大学, 北方生物圏フィールド科学センター, 准教授 (00545626)
ISHIBASHI Yasuyuki 独立行政法人森林総合研究所関西支所, 研究員 (80353580)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Keywords | 生物多様性 / 集団遺伝 / エゾヤチネズミ / 個体数変動 / 遺伝的浮動 / 遺伝子流動 |
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| Research Abstract |
Since most populations long sustain themselves in their mutual interaction, the knowledge about the population structure is essential to understand a mechanism of their sustainability. In this study I investigated the structure of a rodent population for 4 years taking their dynamics (genetic drift) and dispersal (gene flow) into consideration. The main results are as follows: (1) A scale of gene flows differed between sexes. Females' scale (500 m) was smaller than males' (2000 m); (2) The spatial structure differed between mtDNA-based and microsatellite DNA-based structure. A microsatellite DNA-based population included several mtDNA-based populations; (3) Effects of population dynamics was significant in females. Effects of genetic drift dominated over those of gene flow in a low density year.
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