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Plant Diversity ›› 2007, Vol. 29 ›› Issue (01): 38-42.

• 研究论文 • 上一篇    下一篇

三倍体短葶飞蓬的发现及其在育种上的意义

李鹂, 党承林, 黄瑞复   

  1. 吉首大学资源环境学院
  • 收稿日期:2006-03-08 出版日期:2007-02-25 发布日期:2007-02-25
  • 通讯作者: 李鹂

Discovery of Triploid Erigeron breviscapus (Compositae) and Its Potential for Breeding

LI Li, DANG Cheng-Lin, HUANG Rui-Fu   

  1. College of Biology and Enviromental Sciences of Jishou University
  • Received:2006-03-08 Online:2007-02-25 Published:2007-02-25
  • Contact: LI Li

摘要: 对云南省野生居群的短葶飞蓬有丝分裂的细胞学特征进行观察研究。在云南省大理苍山、腾冲杨家坪的二倍体野生居群中, 发现有三倍体个体的存在。苍山居群的两种核型分别为2n = 2x = 18 = 4m + 10sm +4st, 2n = 3x= 27 = 6m+12sm+ 9st ; 杨家坪居群的两种核型分别为2n = 2x = 18 = 6m + 10sm + 2st , 2n = 3x = 27= 3m+ 15sm + 9st。通过对其生物学特性及表型的分析, 认为短葶飞蓬可以采取多倍体育种方式获得更优良的品种。

关键词: 核型, 三倍体, 育种FONTP

Abstract:

The chromosomes number and karyotypes for an important medicinal plant , Erigeron breviscapus ( Vant. ) Hand. -Mazz. , in wild populations from Yunnan were reported in this paper. Two kind of ploidy levels were observed within two populations of the species. (1) Cangshan population: the karyotype formula of the diploid type is 2n = 2x = 18 = 4m+ 10sm+ 4st and 2n = 3x = 27 = 6m + 12sm+ 9st for triploid, (2 ) Yangjiaping population: the karyotype formulaof the diploid type is 2n = 2x= 18 = 6m + 10sm+ 2st and 2n = 3x= 27 = 3m+15sm+9st for triploid. The triploid type of E. breviscapus was discovered for the first time. Morphological characteristics of the triploid individuals suggest that E. breviscapus has a potential for fostering a better breed .

Key words: Erigeron breviscapus

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