西南区野生扁穗牛鞭草种质资源形态多样性研究

The Study on Morphologic Diversity of Wild Hemarthria compressa from Southwest China.

收集西南区不同居群有代表性的40份野生扁穗牛鞭草材料,研究其生境特点及外部形态变异规律。结果表明:西南区扁穗牛鞭草野生资源丰富,在海拔40～1650m均有分布,能适应粘土、壤土、沙土、沙壤土等不同土壤类型;不同居群外部形态变异大,自然高度的变异系数达46.73%,叶长、叶宽、茎直径、节间长和拉直高度变异系数均大于20%,叶色分为深绿、黄绿、灰绿3种,72%的材料能抽穗开花;聚类分析将西南区野生扁穗牛鞭草分为3大形态类型,即粗壮低矮型、高大直立型、纤细低矮型。

40 wild Hemarthria compressa populations was collected from southwest China,habitat characteristic and morphologic variance law were studied.The result showed:Wild Hemarthria compressa resources in southwest China is rich,distribut from altitude 40 to 1650m and adapt different soil such as clay,loam, sand etc.There are great morphologic variation among the different populations.The coefficient of variation of plant hight ranks first,as high as 46.73%,followed by leaf length,leaf width,node thickness,internode thickness and absolute height.The leaf colour can be divided into 3 types,including green,yellow-green,grey-green.72% materials can tassel and blossom.The 40 Hemarthria compressa materials could be divided into 3 morphologic types:thickset-low type,high-horrent type,fine-low type by means of clustering analyse.