2024-03-28T17:30:27Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00027264
2023-01-16T05:11:07Z
643:666:667
Morphological and genetic divergence between two lineages of Magnolia salicifolia (Magnoliaceae) in Japan
Tamaki, Ichiro
89273
Kawashima, Naomichi
89274
Suzuki, Setsuko
89275
Itaya, Akemi
89276
Tomaru, Nobuhiro
89277
approximate Bayesian computation
chloroplast DNA
ecological niche modelling
genetic structure
intraspecific divergence
leaf morphological trait
nuclear microsatellite
phylogeography
population demography
Uncovering how populations of a species differ genetically and ecologically is important for understanding evolutionary processes. We investigated genetic structure using nuclear microsatellites and chloroplast DNA sequences and geographical variation in leaf morphological traits among Magnolia salicifolia populations across its entire range. Two distinct lineages, northern and southern, were detected genetically, and both lineages had substructure among populations. The width/length ratio and area of leaves showed latitudinal gradients, while the position of maximum leaf width exhibited a discontinuous change between the lineages. Approximate Bayesian computation detected exponential population growth and stable population size from the past to the present in the northern and southern lineages, respectively. Small migrations between the lineages were inferred. Divergence time between the lineages was estimated to be the early to middle Pleistocene. Ecological niche modelling revealed a single large potential area of distribution on the Sea of Japan side and multiple intermittent areas on the Pacific Ocean side during the Last Glacial Maximum. We suggest that these distinct evolutionary histories of the northern and southern lineages after diversification have influenced not only neutral markers but also genes controlling leaf morphological traits.
ファイル公開日: 2019/11/01
journal article
Oxford University Press
2018-11
application/pdf
Biological Journal of the Linnean Society
3
125
475
490
0024-4066
1095-8312
https://nagoya.repo.nii.ac.jp/record/27264/files/MSA_demographic_history.pdf
eng
https://doi.org/10.1093/biolinnean/bly139
This is a pre-copyedited, author-produced version of an article accepted for publication in [Biological Journal of the Linnean Society] following peer review. The version of record [Biological Journal of the Linnean Society. v.25, n.3, 2018, p.475-490] is available online at: http://doi.org/10.1093/biolinnean/bly139.