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Abstract Detail


Biogeography

Ikeda, Hajime [1], Fujii, Noriyuki [2], Setoguchi, Hiroaki [1].

Vicariance and evolutionary history of Cardamine nipponica (Brassicaceae), Japanese endemic alpine plant.

Phylogeographic studies have shown that extant species are genetically heterogeneous throughout their ranges. This is believed to result from genetic differentiation following vicariance during the Pleistocene climatic oscillations. However, this genetic heterogeneity and inferred history of vicariance must be challenged with an appropriate model of population history built upon comparisons of multiple nuclear gene sequence variations. We have attempted to elucidate the intraspecific vicariance history of Cardamine nipponica , an endemic Japanese alpine plant. Based on differences observed in ten separate nuclear sequences (ca. 7,000 bp in total) from 38 individuals sampled throughout the entire species range, haplotypes of all loci were grouped into two regions, implying that plant populations from central and northern Japan are isolated from one another. In addition, use of the isolation with migration (IM) model revealed that there has been no migration between the populations since they split. These results demonstrate the vicariance history of the Japanese archipelago, supporting the previously described history in Japanese alpine plants.


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1 - Kyoto University, Graduate School of Human and Environmental Studies, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto, Kyoto, 606-8501, Japan
2 - Kumamoto University, Graduate School of Science and Technology, Kurokami2-39-1, Kumamoto, Kumamoto, 860, Japan

Keywords:
Alpine
population genetics
phylogeography
IM model
Cardamine.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM
Number: PBG005
Abstract ID:254


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