Hybridization and Chloroplast Captures in Asarum sect. Asiasarum (Aristolochiaceae) Documented by Chloroplast DNA Sequences

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概要

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• The phylogenetic relationships of Asarum sect. Asiasarum based on genetic variation in non-coding chloroplast DNA sequences were examined. A total of ca. 960 bp sequences of three non-coding regions, namely trnL (UAA) intron, rps16 intron and psbC-trnS (UGA) intergenic region, were analyzed for 37 accessions from 13 taxa and one geographic race. In the maximum-parsimony (MP) tree, four types were recognized. Among the 13 taxa and one geographic race, 10 taxa were identified as belonging to a single type, while the remaining three taxa and one geographic race, A. patens, A. sieboldii f. sieboldii, A. heterotropoides var. seoulense (from Korea) and A. versicolor, belonged to two types. The types all corresponded to more than one ribotype recognized in previous of nrDNA, ITS sequences. The phylogenetic tree topologies were difficult to compare. Chloroplast polymorphisms within a taxon and incongruence of the phylogenetic tree topologies between chloroplast and ITS were considered to be caused by chloroplast capture following hybridization. Reticulate evolution in sect. Asiasarum was therefore inferred to be more extensive than implied from ITS sequence data. Asarum maruyamae was speculated as being of hybrid origin from crosses between A. sieboldii f. sieboldii and A. mikuniense.

• 2007-11-30

著者

• Yokoyama Jun

  Department of Biology, Faculty of Science, Yamagata University

• FUKUDA Tatsuya

  JST Innovation Satellite Kochi

• Morota Takashi

  Botanical Raw Materials Research Department Tsumura & Co.

• Morota Takashi

  Botanical Raw Materials Research Dept. Tsumura & Co.

• Maki M

  Division Of Ecology And Evolutionary Biology Graduate School Of Life Sciences Tohoku University

• Maki Masayuki

  Division Of Ecology And Evolutionary Biology Graduate School Of Life Science Tohoku University

• Pak J‐h

  Kyungpook National Univ. Daegu Kor

• Fukuda Tatsuya

  Forestry Science Institute Graduate School Of Agriculture Kochi University

• Fukuda Tatsuya

  Department Of Ecology And Evolutionary Biology Graduate School Of Life Sciences Tohoku University

• Yokoyama J

  Division Of Ecology And Evolutionary Biology Graduate School Of Life Sciences Tohoku University

• Yokoyama Jun

  Department Of Biology Faculty Of Science Yamagata University

• Maki Masayuki

  Graduate School Of Life Sciences Tohoku University

• Yokoyama Jun

  Graduate School Of Life Sciences Tohoku University

• Yang Chun-shu

  Beijing University Of Chinese Medicine

• Yokoyama J

  Department Of Biology Faculty Of Science Yamagata University

• YAMAJI HIROKI

  Biological Institute, Graduate School of Science, Tohoku University

• PAW JAE-HONG

  Department of Biology, College of Natural Sciences, Kyung-Pook National University

• ZHOU CHANG-ZHENG

  Beijing University of Chinese Medicine

• Yamaji Hiroki

  Botanical Raw Materials Research Department Tsumura & Co.

• Morota Takashi

  Botanical Raw Materials Research Department Botanical Raw Materials Division Tsumura & Co.

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