Range expansion, genetic differentiation, and phenotypic adaption of Hippophaë neurocarpa (Elaeagnaceae) on the Qinghai–Tibet Plateau

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Range expansion, genetic differentiation, and phenotypic adaption of Hippophaë neurocarpa (Elaeagnaceae) on the Qinghai–Tibet Plateau

Yi‐Xuan KOU [et al.] - Nama Orang;

Plant species shift ranges in response to climate fluctuation over time. However, differentiation related to
heterogeneity in space has been illustrated only rarely. Here we selected Hippophaë neurocarpa S. W. Liu&T. N. Ho
(Elaeagnaceae), a shrub endemic to the Qinghai–Tibet Plateau, to exemplify this process. We characterized the
genotypic, phenotypic, and climatic variations among 27 populations of this species sampled across its entire
distribution. Genotype analyses revealed six highly differentiated groups that may have resulted from expansions in
spatial range. Despite recent fluctuation in size, it is likely that most groups survived the last glacial maximum in situ. Instead of two previously described subspecies, we identified four morphotypes (stellate, peltate, and two additional types) that can be characterized based on leaf trichomes. This phenotypic subdivision is consistent with a climate gradient defined by temperature and precipitation, although similar phenotypes may derive from distinct genotypes. Collectively, we propose that the demographic history of H. neurocarpa is characteristic of an early spatial range expansion combined with a recent bottleneck, subsequently subdivided into multiple morphotypes following local adaption to heterogeneous climates.

Key words genetic differentiation, Hippophaë neurocarpa, phenotypic adaption, range expansion, Qinghai–Tibet
Plateau, Quaternary.

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Informasi Detail

Judul Seri: Journal of Systematics and Evolution
No. Panggil: -
Penerbit: : Institute of Botany., 2014
Deskripsi Fisik: Journal of Systematics and Evolution 52 (3): 303–312 (2014)
Bahasa: English
ISBN/ISSN: doi: 10.1111/jse.120
Klasifikasi: -
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: -
Subjek: BIOLOGI
Info Detail Spesifik: -
Pernyataan Tanggungjawab: Wati/Agus

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FULL TEXT:Range expansion, genetic differentiation, and phenotypic adaption of Hippophaë neurocarpa (Elaeagnaceae) on the Qinghai–Tibet Plateau

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