%0 Journal Article
%A LIU Yu-Ping
%A LÜ Ting
%A ZHOU Yong-Hui
%A ZHANG Xiao-Yu
%A SU Xu
%T Reduction on <em>Orinus longiglumis</em> with Generalized Morphological Characters and nrDNA ITS Sequence
%D 2017
%R 10.7525/j.issn.1673-5102.2017.02.003
%J Bulletin of Botanical Research
%P 174-180
%V 37
%N 2
%X <em>Orinus</em> is an alpine genus with important economic values in the grass family(Poaceae). There are six species in it and all of them have stronger adverse-resistant characteristics, and they are the important resources for improving and applying agricultural breeding and animal husbandry. Meanwhile, the discriminative characters are obscure among these species. We compared and analyzed the main morphological characters and molecular sequence differences among nearest related <em>Orinus longiglumis, O.thoroldii</em> and <em>O.anomala</em> by generalized morphological observation and nuclear ITS region research. There is very slight disparity between <em>O.longiglumis</em> and <em>O.thoroldii</em> in generalized morphological characters, the classification of the two species is very difficult, the differences between <em>O.longiglumis</em> and <em>O.anomala</em> are distinct, and the two taxa are two different species. We further used the ITS sequence variation to tentatively delimit the previously acknowledged species and found that there is no distinct boundary between species and only two distinct lineages were recognized for all three species. A branch is composed of <em>O.longiglumis</em> and <em>O.thoroldii</em>, while another is only made up of <em>O.anomala</em>. The bootstrap support rates of two branches reach as high as 100%. Therefore, <em>O.longiglumis</em> and <em>O.thoroldii</em> should belong to the same species, and <em>O.longiglumis</em> can be reduced to synonymy of <em>O.thoroldii</em>.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2017.02.003