摘要
报道了4个种鹅观草属(RoegneriaC.Koch)植物的核型,其核型公式如下:芒颖鹅观草(R.aristiglum isKeng et S.L.Chen),2n=4x=28=22m+6sm(2SAT);短颖鹅观草(R.breviglu-m isKeng),2n=4x=28=20m(2SAT)+8sm;红原鹅观草(R.hongyuanensisL.B.Cai),2n=4x=28=22m+6sm(2SAT);山东鹅观草(R.shandongensis(B.Salomon)J.L.Yang,Y.H.Zhou etYen),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。
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.
出处
《植物研究》
CAS
CSCD
北大核心
2006年第2期141-146,共6页
Bulletin of Botanical Research
基金
国家自然科学基金项目(30270099和30470135)
四川省教育厅
科技厅项目资助
关键词
鹅观草属
核型
进化
Roegneria C. Koch
karyotypy
evolution
