植物分类学报

• 研究论文 • 上一篇    下一篇

中国毛茛属新分类群及其核型

廖亮, 徐玲玲   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1997-01-10 发布日期:1997-01-10
  • 通讯作者: 廖亮hd

New Taxa of the Genus Ranunculus from China and Their Karyotypes

Liao Liang, Xu Ling-ling   

  • Received:1900-01-01 Revised:1900-01-01 Online:1997-01-10 Published:1997-01-10
  • Contact: Liao Liang

摘要: 新种R.shuich

Abstract: Ranunculus shuichengensis L. Liao from Guizhou Province and R. silerifolius Lévl var dolicanthus L. Liao from Yunnan Province are described as new and their karyotypes are also reported in this paper. The new species showed two karyotypes, i. e. the commnon type 2n = 2x= 16 = 4m + 2sm + 10st(2SAT) and the heterozygoustype 2n = 2x = 16= 4m + 2sm + 9st(1SAT) + 1t(1SAT). The karyotype variation was the occurrence of het eromorphous SAT-chromosomes. It is similar to R. trigonus Hand-Mazz. in mophology and karyotype, but different from the latter by petals broad-obovate, achenes suborbilcular and reduced short arm of SAT-chromosomes (See Plate 1 ). The karyotype of the new variety (2n=2x=16 = 4m + 2sm + 10st(2SAT)) is not the same as that of var. silerifolius. According to the characteristics of the morphology and chromosomes, we consider that the two new taxa under study and R. trigonus are intermediate in the transition from x = 8 to x= 7.

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