Phylogenetic relationships of Citrus and its relatives based on rbcL gene sequences |
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Authors: | Tshering Penjor Toyoaki Anai Yukio Nagano Ryoji Matsumoto Masashi Yamamoto |
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Affiliation: | (1) Faculty of Agriculture, Saga University, Honjo-machi, Saga 840-8502, Japan;(2) Renewable Natural Resources Research Centre Wengkhar, Mongar, Bhutan;(3) Analytical Research Center for Experimental Sciences, Saga University, Honjo-machi, Saga 840-8502, Japan;(4) Faculty of Agriculture, Kagoshima University, Korimoto, Kagoshima 890-0065, Japan; |
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Abstract: | We sequenced the rbcL genes of 64 accessions from 24 genera of Citrus relatives and analyzed them by neighbor-joining and maximum parsimony methods. Both trees supported Swingle and Reece’s (1967) treatment of the subfamily Aurantioideae as monophyletic. However, the trees did not support Swingle and Reece’s treatment of tribes and subtribes. The subgenera Citrus and Papeda were not clustered clearly. The analysis associated the Fortunella group with mandarin, Poncirus with Citrus ichangensis, Severinia buxifolia with Atalantia ceylanica, Microcitrus with Eremocitrus and Citrus micrantha, and Hesperethusa crenulata with Citropsis. Furthermore, Atalantia species showed polytomy. The classification of Swingle and Reece should be reviewed. |
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