Uniform genetic diversity, low differentiation, and neutral evolution characterize contemporary refuge populations of Taiwan fir (Abies kawakamii, Pinaceae)

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Title:	Uniform genetic diversity, low differentiation, and neutral evolution characterize contemporary refuge populations of Taiwan fir (Abies kawakamii, Pinaceae)
Authors:	Shih, Fu-Lung Hwang, Shih-Ying Cheng, Yu-Pin Lee, Pei-Fen Lin, Tsan-Piao
Contributors:	生科所
Keywords:	Abies kawakamii genetic divergence glyceraldehyde 3-phosphate dehydrogenase phylogeography Pinaceae refugium Taiwan trnL-trnF intergenic spacer
Date:	2007
Issue Date:	2009-11-16 10:46:44 (UTC+8)
Abstract:	Based on fossil pollen, the distribution range of Taiwan fir [Abies kawakamii (Hay.) Ito] (Pinaceae) is smaller than it was 50000 years ago. To characterize the present refuge populations of A. kawakamii, which survive only in subalpine forests in Taiwan, we surveyed nuclear genes and chloroplast intergenic spacers to assess the genetic diversity of Taiwan fir. Populations maintain high genetic diversity and contain similar numbers of haplotypes for the GapC (cytosolic glyceraldehyde 3-phosphate dehydrogenase) fragment. Haplotypes for GapC are generally widespread, and population-specific haplotypes accounted for 2.5% of the total. Differentiation among populations is very low (G(ST) = 0.01). Only three haplotypes were detected for the cpDNA marker, and every population had one or two haplotypes. In a neutrality test, the variation in nucleotides did not deviate from that expected with neutral evolution for either marker. A retreat route to higher elevations was not evident from either the GapC or cpDNA markers. Hsuehshan was the site of the most divergent population in Taiwan. We concluded that uniform genetic diversity, low differentiation, low numbers of population-specific haplotypes, and neutral evolution characterize contemporary refuge populations of Taiwan fir.
Relation:	AMERICAN JOURNAL OF BOTANY Volume: 94 Issue: 2 Pages: 194-202
Appears in Collections:	[Graduate Institute of Biotechnology ] journal articles

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