2021年12月6日 星期一
狗牙根与非洲狗牙根形态鉴别性状的筛选
Selection of morphological features for identification of Cynodon dactylon and C. transvaalensis
2007年 第16卷 第3期 页码[23-26]    下载全文[0.5MB]  
摘要

对10个狗牙根〔Cynodon dactylon(L.)Pers.〕和2个非洲狗牙根(C. transvaalensis Burtt-Davy)种源的13个外部形态性状进行了实地观测和统计分析。结果表明,与狗牙根相比,非洲狗牙根的叶片宽度较窄,穗支数较少,小穗较长,节间直径较细,穗支长度较短,差异显著;非洲狗牙根的叶片、葡匐茎及柱头的颜色与狗牙根有明显不同,因此,叶片宽度、节间直径、穗支数、穗支长度、小穗长度、叶片色泽、匍匐茎色泽和柱头色泽8个外部形态性状可作为鉴别这2个种的形态学指标。

Abstract

Thirteen morphological features of ten provenances of Cynodon dactylon(L.)Pers. and two provenances of C. transvaalensis Burtt-Davy were analyzed and compared. The results showed that compared to C. dactylon,the leaf width of C. transvaalensis was narrower, inflorescence number was fewer, internode diameter was thinner, and its inflorescence length was shorter while spikelet longth was longer. There were significant differences in above five indexes between C. dactylon and C.transvaalensis. Inaddition,  leaf,  stolon and style. color of  C.transvaalensis was significant difference to that of C. dactylon. Therefore, the eight morphological features of leaf width, internode diameter, inflorescence number, inflorescence and spikelet length, and color of leaf, stolon and style, can be used as morphological indexes to distinguish this two species.

关键词狗牙根; 非洲狗牙根; 外部性状; 鉴定;
Key wordsCynodon dactylon (L.)Pers.; Cynodon transvaalensis Burtt-Davy; morphological characteristics; identification
作者马克群1,2,刘建秀1,高 鹤1,袁学军1
所在单位1.江苏省•中国科学院植物研究所(南京中山植物园),江苏南京210014;
2.信阳农业高等专科学校,河南信阳464000〕
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基金项目江苏省农业科技攻关项目(BE2003337