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KMID : 0613820100200111697
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Journal of Life Science
2010 Volume.20 No. 11 p.1697 ~ p.1703
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Phylogenic Study of Genus Asarum (Aristolochiaceae) in Korea by trnL-trnT Region
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Lee Byeong-Ryong
Kim Seon-Hoan
Huh Man-Kyu
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Abstract
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Asarum consists of low-growing herbs and is a genus in the Aristolochiaceae family with species found in the north temperate zones with most species in Asia. We evaluated the nine taxa with the trnL - trnT region of the chloroplast genome to estimate phenotypic relationships within genus Asarum in Korea. Alignment of the DNA sequences required the addition of numerous gaps. Sequence variation within the Asarum was mostly due to nucleotide inserts/deletions, although several indels and inserts were found. Another source of sequence divergence was length variation due to stretches of short repeats that occur at the trnL - trnT region in all the Asarum. A + T content for nine Korean species of genus Asarum ranged between 74.7% and 78.3%. These values were higher than those for the angiosperm alignments of the total trnL and trnT region (64.5~67.1%). Within genus Asarum, A. patens was strikingly different from the others in the three phylogenetic analyses (MP, ML, and NJ). However, some internal nodes were poorly supported. Within Korean Asarum, four species were unsolved portions. Possible reasons for the striking non-congruence between the previous morphological traits and the trnL - trnT based on phylogeny were discussed.
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KEYWORD
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Asarum, trnL - trnT, phenotypic relationships
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