A karyomorphological study on Phragmipedium xerophyticum, Orchidaceae

概要

論文の詳細を見る
The karyomorphological observations in Phragmipedium xerophyticum were dealt with. Resting chromosomes were categorized to be the complex chromocenter type. The karyotype of the species was heterogeneous and bimodal in length and composed of both symmetric and asymmetric chromosomes in arm ratio. The chromosome number of 2n=26 was counted here for this species for the first time. The chromosome complement was designated as 2n=26=20V+6I=23V, which differed from that of other species of Phragmipedium expressed as 2n=18V. It seems that the small constriction of I-shaped chromosomes of other species observed as the normal centromere, or the centromere translocation occurred on some I-shaped chromosomes of other speceis. The karyotype of the present species was more similar to that in the members of Phragmipedium than that in the members of Cypripedium and Paphiopedilum.
財団法人染色体学会の論文