Karyomorphology of Corylopsis glabrescens and C. gotoana endemic to Japan (Hamamelidaceae; Hamamelidoideae)
Yoshiko Kono, M. Okada, Hiroaki Setoguchi, Kazuo Oginuma
Abstract
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Yoshiko Kono, M. Okada, Hiroaki Setoguchi, Kazuo Oginuma
Abstract
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Chromosome numbers and karyotypes of Corylopsis glabrescens and C. gotoana in the Hamamelidaceae were investigated. Corylopsis glabrescens was diploid with 2n=24=14m+8sm+2st, while C. gotoana was tetraploid with 2n=48=36m+8sm+4st. The karyotype of the diploid C. glabrescens was different from that of the diploid C. pauciflora previously reported in Japan, suggesting a heterogeneous origin of the two species. The karyotype of the tetraploid C. gotoana seemed to share a homogeneous karyotype composition with the hexaploid C. spicata previously reported in Japan.
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Chromosome numbers and karyotypes of Corylopsis glabrescens and C. gotoana in the Hamamelidaceae were investigated. Corylopsis glabrescens was diploid with 2n=24=14m+8sm+2st, while C. gotoana was tetraploid with 2n=48=36m+8sm+4st. The karyotype of the diploid C. glabrescens was different from that of the diploid C. pauciflora previously reported in Japan, suggesting a heterogeneous origin of the two species. The karyotype of the tetraploid C. gotoana seemed to share a homogeneous karyotype composition with the hexaploid C. spicata previously reported in Japan.
Key concepts: Karyotype, Ploidy, Biology, Botany, Chromosome, Homogeneous, Chromosome number, Genetics