Abstract
Previous phylogeographic studies of alpine plants in Japan have inferred that populations in central Honshu persisted during the Pleistocene climatic oscillations and suggested interglacial survival in high mountains. However, Arcterica nana (Maxim.) Makino (Ericaceae) exhibits a homogenous genetic structure throughout Japan and may therefore have a unique phylogeographic history. This inconsistency could have resulted from insufficient resolution of previously analyzed chloroplast DNA sequences. Therefore, we conducted a phylogeographic investigation based on amplified fragment length polymorphisms. Using 176 individuals from 21 populations, the relationships among individuals and populations were determined by principal coordinate analysis and a neighbor-joining tree, respectively. In addition, genetic differentiation was estimated using analysis of molecular variance and spatial autocorrelation analysis. These analyses demonstrate a homogenous structure throughout the entire Japanese range, supporting the previous cpDNA phylogeography. Although this genetic structure is inconsistent with those of other alpine plants, it is difficult to postulate that pre-existing genetic differentiation was swamped exclusively within A. nana. Therefore, this homogenous genetic structure may have been caused by the distinct history of populations of A. nana. Specifically, the southern-ward migration and the subsequent continuous populations enabled gene flow throughout the Japanese archipelago during the last glacial period. Thus, our data suggest that alpine plants in the Japanese archipelago did not always experience a shared distribution change following climatic oscillations.
| Original language | English |
|---|---|
| Pages (from-to) | 141-151 |
| Number of pages | 11 |
| Journal | Journal of Plant Research |
| Volume | 122 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Mar 2009 |
| Externally published | Yes |
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Keywords
- Alpine plants
- Arcterica nana
- Climatic oscillations
- Isolation by distance
- Japanese archipelago
- Phylogeography
ASJC Scopus subject areas
- Plant Science
- Medicine(all)
Cite this
The homogenous genetic structure and inferred unique history of range shifts during the Pleistocene climatic oscillations of Arcterica nana (Maxim.) Makino (Ericaceae). / Ikeda, Hajime; Setoguchi, Hiroaki.
In: Journal of Plant Research, Vol. 122, No. 2, 03.2009, p. 141-151.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The homogenous genetic structure and inferred unique history of range shifts during the Pleistocene climatic oscillations of Arcterica nana (Maxim.) Makino (Ericaceae)
AU - Ikeda, Hajime
AU - Setoguchi, Hiroaki
PY - 2009/3
Y1 - 2009/3
N2 - Previous phylogeographic studies of alpine plants in Japan have inferred that populations in central Honshu persisted during the Pleistocene climatic oscillations and suggested interglacial survival in high mountains. However, Arcterica nana (Maxim.) Makino (Ericaceae) exhibits a homogenous genetic structure throughout Japan and may therefore have a unique phylogeographic history. This inconsistency could have resulted from insufficient resolution of previously analyzed chloroplast DNA sequences. Therefore, we conducted a phylogeographic investigation based on amplified fragment length polymorphisms. Using 176 individuals from 21 populations, the relationships among individuals and populations were determined by principal coordinate analysis and a neighbor-joining tree, respectively. In addition, genetic differentiation was estimated using analysis of molecular variance and spatial autocorrelation analysis. These analyses demonstrate a homogenous structure throughout the entire Japanese range, supporting the previous cpDNA phylogeography. Although this genetic structure is inconsistent with those of other alpine plants, it is difficult to postulate that pre-existing genetic differentiation was swamped exclusively within A. nana. Therefore, this homogenous genetic structure may have been caused by the distinct history of populations of A. nana. Specifically, the southern-ward migration and the subsequent continuous populations enabled gene flow throughout the Japanese archipelago during the last glacial period. Thus, our data suggest that alpine plants in the Japanese archipelago did not always experience a shared distribution change following climatic oscillations.
AB - Previous phylogeographic studies of alpine plants in Japan have inferred that populations in central Honshu persisted during the Pleistocene climatic oscillations and suggested interglacial survival in high mountains. However, Arcterica nana (Maxim.) Makino (Ericaceae) exhibits a homogenous genetic structure throughout Japan and may therefore have a unique phylogeographic history. This inconsistency could have resulted from insufficient resolution of previously analyzed chloroplast DNA sequences. Therefore, we conducted a phylogeographic investigation based on amplified fragment length polymorphisms. Using 176 individuals from 21 populations, the relationships among individuals and populations were determined by principal coordinate analysis and a neighbor-joining tree, respectively. In addition, genetic differentiation was estimated using analysis of molecular variance and spatial autocorrelation analysis. These analyses demonstrate a homogenous structure throughout the entire Japanese range, supporting the previous cpDNA phylogeography. Although this genetic structure is inconsistent with those of other alpine plants, it is difficult to postulate that pre-existing genetic differentiation was swamped exclusively within A. nana. Therefore, this homogenous genetic structure may have been caused by the distinct history of populations of A. nana. Specifically, the southern-ward migration and the subsequent continuous populations enabled gene flow throughout the Japanese archipelago during the last glacial period. Thus, our data suggest that alpine plants in the Japanese archipelago did not always experience a shared distribution change following climatic oscillations.
KW - Alpine plants
KW - Arcterica nana
KW - Climatic oscillations
KW - Isolation by distance
KW - Japanese archipelago
KW - Phylogeography
UR - http://www.scopus.com/inward/record.url?scp=60849104391&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=60849104391&partnerID=8YFLogxK
U2 - 10.1007/s10265-008-0213-5
DO - 10.1007/s10265-008-0213-5
M3 - Article
C2 - 19151915
AN - SCOPUS:60849104391
VL - 122
SP - 141
EP - 151
JO - Journal of Plant Research
JF - Journal of Plant Research
SN - 0918-9440
IS - 2
ER -