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Plant Diversity ›› 1990, Vol. 12 ›› Issue (S3): 1-3.

• 研究论文 •    

开口箭属4个种的核型研究

黄锦岭 李恒 刘宪章   

  1. 中国科学院昆明植物研究所
  • 出版日期:1990-12-26 发布日期:1990-12-26

KARYOTYPE STUDY ON FOUR SPECIES OF TUPISTRA (LILIACEAE)

Huang Jinling Li Heng Liu Xianzhang   

  1. Kunming Institute of Botany, Academia Sinica
  • Online:1990-12-26 Published:1990-12-26

摘要:

本文报道了开口箭属(Tupistra)4个种的核型,4个种皆为2倍体,染色体数目为2n=38,基数为X=19,核型有2种类型:剑叶开口箭(T.ensifolia: 2n=2X=38=34m(2SAT)+4sm)、齿瓣开口箭(T.fimbiata: 2n=2x=38=30m+8sm) 和环花开口箭(T.annulata:2n=2x=38=24m(6SAT)+14sm)的核型为2B型,由一型染色体组成,长柱开口箭(T.grandistigma:2n=2x=38=20m+6sm+12St(2SAT))的核型为2C型,由二型染色体组成。长柱开口箭是属内较为进化的一个类群。

关键词: 开口箭属;核型, 染色体

Abstract:

This paper has dealt with the chromosome numbers and karyotypes of 4 species of the genus tupistra. It is found that all the species studied are diploids with chromosome num-ber 2n=38. The karyotype formula of T.annulata is 2n=2x= 38=34m(2SAT) +4sm,T. fimbriata2n=2x=38=30m+8sm,T.annulata 2n=2x=38=24m (6SAT) + 14sm andT.grandistigma 2n= 2x= 38= 20m+6sm+12st (2SAT) . The karyotypes of T.ensifolia, T. fimbriata, T. annulata are unimodal while the Karyotype of T. grandistigma is bimodal. T.grandistigma is a advanced species in the genus Tupistra.

Key words: Tupistra, Karyotype, Chromosome