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KMID : 0613820080180071019
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Journal of Life Science
2008 Volume.18 No. 7 p.1019 ~ p.1022
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Chromosome Compositions of Four Cultivated Cucurbitaceae Species
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Kwon Ji-Yeon
Park Hye-Mi
Lee Sung-Nam
Choi Sun-Hee
Song Kyung A
Kim Hyun-Hee
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Abstract
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The chromosome numbers and compositions were investigated in four cultivated species of Cucurbitaceae; Cucumis sativus L., Citrullus lanatus (Thunb.) Matsum. et Nakai, Cucumis melo L., Luffa cylindrica (L.) Roemer. through general aceto-orcein staining method. The chromosome compositions of four species were diploids of 2n=22, 2n=24 and 2n=26 respectively. The chromosomes were relatively small and showed gradual length degradation from 2.50 ㎛ to 2.16 ㎛ in Cucumis sativus, 3.71 ㎛ to 2.11 ㎛ in Cucumis melo, 3.20 μm to 2.40 ㎛ in Citrullus lanatus and 3.17 ㎛ to 1.97 ㎛ in Luffa cylindrica. The chromosome types consisted of all metacentrics in Cucumis sativus, seven pairs submetacentrics and five pairs metacertrics in C. melo, four pairs of submetacentrics and seven pairs metacertrics in Citrullus lanatus, and two pairs submetacentrics and eleven pairs metacentrics in Luffa cylindrica (L.) Roemer.. The satellites were found in a pair of chromosomes in C. melo and two pairs in Luffa cylindrica. The chromosome compositions in these four species showed species-specific patterns and seemed to provide useful informations for breeding and molecular cytogenetic works on Cucurbitaceae.
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KEYWORD
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Cucurbitaceae, karyotype, Cucumis, Citrullus, Luffa
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