HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

What's this?

This Article Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Yamane, K. Articles by Ohnishi, O. Search for Related Content PubMed Articles by Yamane, K. Articles by Ohnishi, O. Agricola Articles by Yamane, K. Articles by Ohnishi, O. Social Bookmarking                            What's this?

Intraspecific cpDNA variations of diploid and tetraploid perennial buckwheat, Fagopyrum cymosum (Polygonaceae)¹

Graduate School of Agriculture, Kyoto University, Nakajoh 1, Mozume-cho, Mukoh 617-0001, Japan

We investigated the phylogenetic and biogeographic relationships of natural populations of diploid and tetraploid Fagopyrum cymosum (Polygonaceae). Intraspecific variation of chloroplast DNA sequences was detected in three regions approximately 5 kb long in total: the 3' end of rbcL, accD and associated intergenic spacer region, the trnC (GCA)-rpoB spacer region, the trnK (UUU) intron, and the matK region. The accessions of F. cymosum were divided into two major groups, a Tibet-Himalayan clade and a Yunnan-Sichuan clade, with a high bootstrap probability. It was estimated that these two clades diverged about 0.7 million years ago. The geographical and climatic interruption by the Hengduanshan mountains might have caused the genetic divergence in F. cymosum. Autotetraploid populations of F. cymosum have arisen allopatrically from a diploid progenitor at least twice, once in the Tibet-Himalayan area and once in the Yunnan-Sichuan area. This conclusion reinforces a previous study based on allozyme variation. We also found that F. tataricum, a close relative of F. cymosum, was completely included within the Tibet-Himalayan clade in the phylogenetic tree. This suggests that F. tataricum speciated from F. cymosum in the Tibet-Himalayan area.

Key Words: autotetraploid • biogeography • chloroplast DNA • Fagopyrum cymosum • multiple origin • Tartary buckwheat

CiteULike    Complore    Connotea    Del.icio.us    Digg    Facebook    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				S. Fenart, P. Touzet, J.-F. Arnaud, and J. Cuguen Emergence of gynodioecy in wild beet (Beta vulgaris ssp. maritima L.): a genealogical approach using chloroplastic nucleotide sequences Proc R Soc B, June 7, 2006; 273(1592): 1391 - 1398. [Abstract] [Full Text] [PDF]

				J. Shaw, E. B. Lickey, J. T. Beck, S. B. Farmer, W. Liu, J. Miller, K. C. Siripun, C. T. Winder, E. E. Schilling, and R. L. Small The tortoise and the hare II: relative utility of 21 noncoding chloroplast DNA sequences for phylogenetic analysis Am. J. Botany, January 1, 2005; 92(1): 142 - 166. [Abstract] [Full Text] [PDF]

				Q.-F. Chen, Sai. L. K. Hsam, and F. J. Zeller A Study of Cytology, Isozyme, and Interspecific Hybridization on the Big-Achene Group of Buckwheat Species (Fagopyrum, Polygonaceae) Crop Sci., September 1, 2004; 44(5): 1511 - 1518. [Abstract] [Full Text] [PDF]

				J. Shaw and R. L. Small Addressing the "hardest puzzle in American pomology:" Phylogeny of Prunus sect. Prunocerasus (Rosaceae) based on seven noncoding chloroplast DNA regions Am. J. Botany, June 1, 2004; 91(6): 985 - 996. [Abstract] [Full Text] [PDF]