Studies on Karyotypes of 5 Species of Rohdea and Tupistra

Abstract

Abstract:

Five species of the genera Rohdea and Tupistra of Liliaceae were cytota-

xonomically investigated in this work. The materials were collected from Jiangxi, Zhejiang,

and Sichuan provinces. The results are shown as follows.

1. Rohdea Roth There are two forms of Rohdea japonica (Thunb.) Roth. The karyo-

type formula of the cultivated form is 2n=38=28m+8sm+2st (Plate, 1), while that of the

wild one is 2n=38=26m+10sm+2st (Plate, 1). They both belong to Stebbins' (1971) karyotype

classification 2 B.

2. Tupistra Ker-Gawl. The karyotype of Tupistra chinensis Baker from Mt. Lu-

shan, Jiangxi,is 2n=38=24m+14sm(Plate, 2), which differs from that of Campylandra

watanabei(=T. chinensis) from Taiwan, which is 2n = 38 = 32m + 4sm + 2st (Ch-

ang et Hsu, 1974). The chromosome numbers and karyotypes of the three species

from Nanchuan, Sichuan, are reported here for the first time. The karyotype for-

mulas of T. delavayi Franch. and T. jinshanensis Z. L. Yang et X. G. Luo are both

2n= 38 = 26m + 12sm (Plate, 2-3), and that of T. wattii (C. B. Clarke) Hook.

f. is 2n= 38= 28m + 10sm (Plate, 3). They all belong to 2B.

3. In Convallarieae (s. 1.) the chromosome numbers of all the genera, except for Thero-

pogon, are 2n=38 or both 2n=38 and 2n=36 in Aspidistra. The karyotypes of Rohdea and

Tupistra are most similar, the differenc in karyotype between two genera is only presence or

absence of a pair of subterminal chromosomes. The karyotype of Rohdea is similar to that of

Convallaria rather than to those of Aspidistra and Speirantha, while the karyotype of Tupistra

is similar to that of Reineckia rather than to those of the other genera.

Key words: Rohdea, Tupistra, karyotype, Idiogram, China

Yang Di-Qing, Zhu Xie-Fu. Studies on Karyotypes of 5 Species of Rohdea and Tupistra[J]. .

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Studies on Karyotypes of 5 Species of Rohdea and Tupistra

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