欢迎访问《植物研究》杂志官方网站,今天是 分享到:

植物研究 ›› 2006, Vol. 26 ›› Issue (2): 141-146.doi: 10.7525/j.issn.1673-5102.2006.02.008

• 论文 • 上一篇    下一篇

鹅观草属4个种的核型与进化

曹 刚;周永红*;张海琴;康厚扬;邓小锋   

  1. 四川农业大学小麦研究所,都江堰 611830
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-03-20 发布日期:2006-03-20
  • 通讯作者: 周永红
  • 基金资助:
     

Karyotypic and evolution variations of four species in Roegneria

CAO Gang;ZHOU Yong-Hong*;ZHANG Hai-Qin;KANG Hou-Yang;DENG Xiao-Feng   

  1. Triticeae Research Institute, Sichuan Agricultural University, Dujiangyan 611830
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-03-20 Published:2006-03-20
  • Contact: ZHOU Yong-Hong
  • Supported by:
     

摘要: 报道了4个种鹅观草属(Roegneria C. Koch)植物的核型,其核型公式如下:芒颖鹅观草(R. aristiglumis Keng et S. L. Chen), 2n=4x=28=22m+6sm(2SAT);短颖鹅观草(R. breviglumis Keng), 2n=4x=28=20m(2SAT)+8sm;红原鹅观草(R. hongyuanensis L. B. Cai), 2n=4x=28=22m+6sm(2SAT);山东鹅观草(R. shandongensis(B. Salomon)J. L. Yang, Y. H. Zhou et Yen), 2n=4x=28=24m(2SAT)+4sm。同时对染色体主要特征的演变规律进行了分析,揭示了鹅观草属4个种的相对进化程度以及宏观分类中2个组的系统发育关系,表明鹅观草属的半颖组在系统发育中派生了颖体短小的小颖组。

关键词: 鹅观草属, 核型, 进化

Abstract: Karyotypes of four Roegneria species, R. aristiglumis Keng et S. L. Chen, R. breviglumis Keng, R. hongyuanensis L. B. Cai, and R. shandongensis (B. Salomon) J. L. Yang, Y. H. Zhou et Yen, were reported. The karyotype formulae of R. aristiglumis, R. breviglumis, R. hongyuanensis, R. shandongensis are 2n=4x=28=22m+6sm(2SAT), 2n=4x=28=20m(2SAT)+8sm, 2n=4x=28=22m+6sm (2SAT), 2n=4x=28=24m(2SAT)+4sm, respectively. The advance indexes which can reflect the evolutional levels of the four species were summarized. The phylogenetic relationships of the two sections in the macroscopic classification were enunciated. The results show that R. shandongensis is the most primitive, R. breviglumis is the most evolutive among the four species; and the Sect. Goulardia (Husnot) L. B. Cai might produce the Sect. Roegneria in the phylogenetic process of Roegneria C. Koch.

Key words: Roegneria C. Koch, karyotypy, evolution

中图分类号: