%0 Journal Article
%A CAO Gang
%A DENG Xiao-Feng
%A KANG Hou-Yang
%A ZHANG Hai-Qin
%A ZHOU Yong-Hong*
%T Karyotypic and evolution variations of four species in <em>Roegneria</em>
%D 2006
%R 10.7525/j.issn.1673-5102.2006.02.008
%J Bulletin of Botanical Research
%P 141-146
%V 26
%N 2
%X Karyotypes of four <em>Roegneria</em> species, <em>R. aristiglumis</em> Keng et S. L. Chen, <em>R. breviglumis</em> Keng, <em>R. hongyuanensis</em> L. B. Cai, and <em>R. shandongensis</em> (B. Salomon) J. L. Yang, Y. H. Zhou et Yen, were reported. The karyotype formulae of <em>R. aristiglumis</em>, <em>R. breviglumis</em>, <em>R. hongyuanensis</em>, <em>R. shandongensis</em> 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 <em>R. shandongensis</em> is the most primitive, <em>R. breviglumis</em> is the most evolutive among the four species; and the Sect. <em>Goulardia</em> (Husnot) L. B. Cai might produce the Sect. <em>Roegneria</em> in the phylogenetic process of <em>Roegneria</em> C. Koch.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2006.02.008