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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (24): 46-51.

所属专题： 园艺

• 农学 农业基础科学 • 上一篇    下一篇

齿瓣石斛群体性状的变异及主成分分析

伍淳操 明兴加 赵纪峰 王昌华 张植玮 刘翔   

  • 收稿日期:2011-10-19 修回日期:2012-01-14 出版日期:2012-08-25 发布日期:2012-08-25
  • 基金资助:

    重庆市科委攻关项目“珍稀齿瓣石斛种苗快繁及高产栽培关键技术研究与示范”;重庆市科委自然科学基金项目“珍稀齿瓣石斛新型光自养微繁—非试管快繁体系（TERNPC）的建立”

Variation and Principal Component Analysis of Populations Phenotypic Traits of Six Dendrobium devonianum Paxt.

  • Received:2011-10-19 Revised:2012-01-14 Online:2012-08-25 Published:2012-08-25

PDF (PC)

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摘要：

探索齿瓣石斛群体变异情况，为生产和育种提供参考。选择齿瓣石斛人工仿野生栽培1~3年的基地6个，每个基地随机选择3个样点，每样点面积2 m2，统计6个主要变异类型的植株数；每个变异类型统计茎长、茎粗、茎节数、单条鲜重、叶长、叶宽、长宽比、叶面积；采用SPSS软件对不同类型齿瓣石斛性状进行差异显著性分析和主成分分析。结果表明齿瓣石斛狭叶粗壮型所占比例最高，血草型最少；铁线草的茎长、茎节数最大，显著高于血草型(P<0.05)和紫鞘粗壮型(P<0.05)；宽叶粗壮型的茎粗和单条鲜重均显著高于其他各组(P<0.05)；在叶长、叶宽、叶面积上，宽叶粗壮型、狭叶粗壮型、紫鞘粗壮型分列前三位，属于大叶类型，与血草型相比均有显著差异（(P<0.05)；齿瓣石斛主要群体性状指标存在不同程度的变异，以单条鲜重和叶面积变异程度最大；在齿瓣石斛育种工作中，可以尝试集中考察能反映齿瓣石斛综合性状的茎长和茎粗这2个植物学性状指标，以提高齿瓣石斛新品种选育的效率。

关键词: 示范效果, 示范效果

Abstract:

The comparison of some biological characteristics of six variation types of Dendrobium devonianum Paxt. was performed to evaluate the variation and provide support for production and selecting species. Three sampling sites (2 m2 for each) from each base were selected. Followed data were recorded: Number of plants for each type; stem length, stem thick, stripes numbers, fresh weight, leaf length, leaf breadth, length breadth ratio and leaf area. The significance of differences and principal component analysis was used to analyze different biological characteristics by SPSS. The results indicated that: the narrow leaf/muscular type had the maximum proportion but the red core type had the least proportion among six variation types; the Bermuda grass herb type had the maximum stem length and stipes numbers, and had significance compared with that of red core type (P<0.05) and purple sheath/muscular type (P<0.05); the stem thick and fresh weight of wide leaf/muscular type was significantly higher than that of other types(P<0.05); the wide leaf/muscular type, narrow leaf/muscular type and purple sheath/muscular type were the first three types for the leaf length, leaf breadth and leaf area, and were significantly higher than red core type(P<0.05); the variation existed in different types were distinct, the fresh weight and leaf area varied obviously; the stem length and stem thick could be used for selecting species of Dendrobium devonianum Paxt. in order to improve efficiency.