e-journal

Phylogeography of the Qinghai–Tibet Plateau endemic alpine herb Pomatosace filicula

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In order to trace the response of alpine plants on the Qinghai–Tibet Plateau (QTP) to the Quaternary climate
oscillations, the phylogeographic history of Pomatosace filicula Maxim. was investigated in the present study. Based
on sequence variations of two maternally inherited plastid markers, matK and trnH‐psbA, and the biparentally
inherited nuclear ribosomal internal transcribed spacer (nrITS), we estimated the population genetic structure, lineage divergence timescale, and population dynamics of P. filicula. Seven plastid haplotypes and two nrITS genotypes were identified across the range‐wide sampling of 200 individuals from 24 populations. AlthoughAMOVArevealed a high level of differentiation among populations (FST¼0.560), no significant phylogeographic structure was detected (NST¼0.503, GST¼0.518, P>0.05). Molecular dating suggested that the divergences between major plastid lineages and nrITS genotypes occurred during the early and middle Pleistocene, and the middle Pleistocene,
respectively. This species most likely survived at multiple unglaciated sites on the QTP during the Last Glacial
Maximum, with most of these sites located above 4000m a.s.l. The species probably experienced range expansion at
its distribution fringe, but demographic tests did not suggest significant population size changes. We proposed that
pronounced effective gene flow (Nem¼0.393) and short generation time may have obscured the phylogeographic and
demographic patterns of this species. Our findings will shed new light on the Quaternary evolutionary history of the
alpine flora of the QTP.

Key words phylogeography, plastid DNA, Pomatosace filicula, Qinghai–Tibet Plateau, Quaternary.

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Systematics and Evolution

No. Panggil

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Penerbit

: Institute of Botany., 2014

Deskripsi Fisik

Journal of Systematics and Evolution 52 (3): 289–302 (2014)

Bahasa

English

ISBN/ISSN

doi: 10.1111/jse.120

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

BIOLOGI

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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