Pleistocene glaciations, demographic expansion and subsequent isolation promoted morphological heterogeneity: A phylogeographic study of the alpine Rosa sericea complex (Rosaceae)

While most temperate plants probably underwent glacial constriction to refugia and interglacial expansion, another type of interglacial refugia might have existed to maintain alpine plants during warm periods. To test this hypothesis, we applied phylogeographic methods to 763 individuals (62 populat...

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Bibliographic Details
Published in:Scientific reports 2015-06, Vol.5 (1), p.11698-11698, Article 11698
Main Authors: Gao, Yun-Dong, Zhang, Yu, Gao, Xin-Fen, Zhu, Zhang-Ming
Format: Article
Language:English
Subjects:
631/158/852
631/181/457
631/449/2669
Chloroplast DNA
DNA, Chloroplast - chemistry
DNA, Chloroplast - classification
Ecosystem
Evolution, Molecular
Genetic Variation
Genotype
Haplotypes
Humanities and Social Sciences
Microsatellite Repeats
Models, Genetic
multidisciplinary
Oscillations
Phylogeny
Phylogeography
Refugia
Rosa - anatomy & histology
Rosa - genetics
Science
Sequence Analysis, DNA
Subtropical zones
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Summary:While most temperate plants probably underwent glacial constriction to refugia and interglacial expansion, another type of interglacial refugia might have existed to maintain alpine plants during warm periods. To test this hypothesis, we applied phylogeographic methods to 763 individuals (62 populations) which belong to 7 taxonomically difficult species of the Rosa sericea complex distributed in alpine regions of the temperate and subtropical zones in eastern Asia. We used three chloroplast (cp) DNA fragments ( trn L- trn F, ndh F- rpl 32 and ndh J -trn F) approximately 3,100 bp and nuclear microsatellite (nSSR) on eight sites to determine whether cold tolerant plants experienced expansion during the Pleistocene. The neutral test and mismatch distribution analysis (MDA) indicated that whole populations and major lineages of the Qinghai-Tibet Plateau (QTP) underwent expansion during the middle to late Pleistocene. Environmental niche modeling (ENM) indicates more suitable habitats during the Last Glacial Maximum (LGM) than at present. We concluded that the demographic history of R. sericea , which diverged in the middle Pleistocene, was mostly affected by climatic oscillations instead of by geographical barriers. The low genetic divergence, as well as the weak phylogenetic structure in the R. sericea complex both support treating this complex as a single taxon.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep11698