竹节草种质资源形态多样性研究  

Morphological Diversity of Chrysopogon aciculatus

作　　者：廖丽[1,2] 白昌军[3] 郭晓磊[2] 王志勇[1,2] 

机构地区：[1]海南大学农学院,海南儋州571737 [2]海南大学热带作物种质资源保护与开发利用教育部重点实验室,海南海口570228 [3]中国热带农业科学院热带作物品种资源研究所热带牧草研究中心,海南儋州571737

出　　处：《热带作物学报》2011年第11期2042-2047,共6页Chinese Journal of Tropical Crops

基　　金：国家自然科学基金项目(No.31060266);海南省自然科学基金项目(No.310031);江苏省滩涂生物资源与环境保护重点建设实验室开放课题项目(No.JLCBE10005);海南大学作物学省级重点项目;海南大学热带作物种质资源保护与开发利用教育部重点实验室课题项目(No.2010hckled-02);海南大学博士启动基金(No.KYCD1111);海南省教育科学"十一五"规划项目(No.QJI11527)

摘　　要：利用外部形态指标,对28份竹节草种质的外部形态进行初步评定,以明确竹节草种质的形态差异。结果表明:竹节草种内形态变异很大,其中,穗长变异系数最大,可高达80.80%,叶宽变异系数最小为12.36%,所有指标变异系数平均为39.41%且达到极显著差异(p<0.01);竹节草草层越高,生殖枝越高大;花序密度越高,生殖枝愈高且分支数越多,结实率越高;匍匐茎叶片越长,节间越细且越短,直立枝越小;在欧氏距离10.1处,竹节草种质被分为无花序型、花序密度和植株高度介于前后两者之间的中间型、植株高大且花序密度高类型。Sixteen indicators related to external morphology were assessed to make a preliminary assessment of morphological characteristic of 28 Chrysopogon aciculatus accessions from different geographical distributions. The results were as fellows： ①There was rich diversity in morphological index, green period, and turf quality of C. aeiculatus, the variant coefficient of 80.80% for ear length was the highest, the leaf width of 12.36% was the lowest, the average of all variation was 39.41%; ②The grass layers were higher and the reproductive branches were higher; the inflorescences were denser and the reproductive branches were higher, the same time the inflorescence branches were more and the number of seeds were more; the leaves of stolon were thinner and the upright branches were small, the same time the internodes of stolon were shorter and thinner. ③The accessions of C. aciculatus could be divided into 3 groups by means of UPGMA. The 1st group was no inflorescence; the 2nd group belonged to intermediate type; the 3rd group was high-density inflorescence and high plant. This study could provide a reference for the further utilization of C. aciculatus.

关 键 词：竹节草 种质资源 聚类 相关性 形态多样性 

分 类 号：S543.9[农业科学—作物学]