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中国和日本产竹叶子(亚种)(鸭跖草科)核型的一致性

洪德元   

  1. (中国科学院植物研究所,北京)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1986-08-18 发布日期:1986-08-18
  • 通讯作者: 洪德元

Karyotype Uniformity of Streptolirion volubile subsp. volubile (Commelinaceae) from China and Japan

Hong De-Yuan   

  1. (Institute of Botany, Academia Sinica, Beijing)
  • Received:1900-01-01 Revised:1900-01-01 Online:1986-08-18 Published:1986-08-18
  • Contact: Hong De-Yuan

关键词: 竹叶子属, 竹叶子, 核型, 中国, 日本, 印度

Abstract:

Four populations of the subspecies (one from Mêdog,  southern Xizang
(Tibet),  two  from Lunnan, central Yunnan, and the  other from Yanqing, Bei-
jing), are shown to have uniform karyotype (Plate I, Table 1, Fig. 1 and 2). Although
some differences in arm ratio appear among the four populations, the differences are
not stadistically significant as shown with 95% confidence limits (Table 1).  The kar-
yotype shown here is extremely similar to the one reported by Suda and Fedan (1980).
But the subspecies was reported to have 2n=6 (Kammathy and Rao, 1964) and 2n=12
from northeastern India (Sharma and Sharma, 1958), with both chromosome number
and structure (2n=2M+8m(4SAT)+2st) strikingly different from those of Chinese and
Japanese materials (Suda and Fedan, 1980), and 2n=48 from Korea. As the localities
where our materials and Suda and Fedan's one came from cover almost the whole dis-
tribution area of the subspecies, from the western extreme to the eastern extreme, from
nearly southernmost part to northernmost part, the present author spaculate that the re-
ports from India and Korea may well be based on misidentified materials.
      If karyotype formula is used to express the karyotypes of the materials used in
this work, they will be 2n=10=2sm+6st(2SAT)+2t (Mêdog,  Xizang); 2n=10=2m+
8st (2SAT)and 2n=10=2sm+8st (2SAT)(Lunan,  Yunnan),  and  2n=10=2sm+6st
(2SAT)+2t (Yanqing, Beijing).  As already stated above, however, the differences ex-
pressed by the formulae are false ones. Therefore, relative value of karyotype formula
should be seriously considered and special caution must be taken when it is used

Key words: Streptolirion, S.volubile, Karyotype, China, Japan, India