柱花草种质抗旱性综合评价

摘要/Abstract

摘要： 对我国目前主要推广种和部分引进的柱花草种质进行抗旱性综合评价。采用完全随机区组设计，4梯度人工控水干旱，测试其各项形态指标和生理指标，选出与水分胁迫达极显著相关的8项指标，用隶属函数值法，对44份柱花草种质的抗旱性综合评价。与抗旱性成正相关的指标为：相对生物量、相对株高、叶片抗旱级别、相对qP、相对脯氨酸含量、相对Fv/Fm、相对Fv’/Fm’；负相关的有：相对电导率。抗旱性综合评价显示，抗旱性最强的依次为：热研5号、USTPRC90139、爱德华①、爱德华②和CIAT11369；最弱的依次为：CPI18750A、TPRC90037②、TPRC90037③和TPRC90028。聚类分析将44份柱花草种质抗旱性可分为3类：高抗旱性10份、中抗旱性15份、低抗旱性19份。本研究为筛选柱花草优良种质和育种材料提供了理论和实践的科学数据。

关键词: 预处理方法, 预处理方法, 湖泊沉积物, 有机磷组分, 自然粒度

Abstract: In order to comprehensively evaluate the drought tolerance of the China Stylosanthes germplasm resources, which included the principally promotional cultivars and some imported species. In this study, it was first time by using membership function values as an indicator to study the drought tolerance of 44 selected Stylosanthes germplasms through randomized block design and 4 controlled soil water gradients. The results showed that 8 indexes have been identified to be significantly correlative to water stress, in which the factors with positive correlation to drought tolerance are the relative biomass, the relative plant height, the drought resistant level of leaves, the relative praline , the relative qP, the relative Fv/Fm and the relative Fv’/Fm’; the factors with negative correlation to water stress is the relative conductivity. The results from the comprehensive evaluation have indicated that the 44 selected Stylosanthes germplasms with the strongest drought tolerance are: Stylosanthes guianensis cv. Reyan No.5, S. guianensis USTPRC90139, S. guianensis cv. Endeavour①, S. guianensis cv. Endeavour② and S. guianensis CIAT11369, the weakest are: S. guianensis CPI18750A, S. guianensis TPRC90037②, S. guianensis TPRC90037③, S. guianensis TPRC90028. Cluster analysis based on comprehensive ranker of drought tolerance showed that the 44 Stylosanthes germplasms can be divided into three categories: 10 species of them show highly drought tolerance, 15 species of them are with middlely drought tolerance, 19 species of them are with lowestly drought tolerance,. The results provide the theoretic and practical scientific data for selecting the excellent Sthlosanthes germplasms and breeding materials.

薛瑞,,周广奇,胡新文,郭建春,唐燕琼. 柱花草种质抗旱性综合评价[J]. 中国农学通报, 2009, 25(11): 224-233.

Xue Rui,, Zhou Guangqi, Hu Xinwen, Guo Jianchun, Tang Yanqiong. Stylosanthes; comprehensive evaluation; drought tolerant indexes; germplasm resources[J]. Chinese Agricultural Science Bulletin, 2009, 25(11): 224-233.

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致谢：试验期间得到刘国道研究员、白昌军研究员、何华弦副研究员，罗运军、蒙秋伊等同学给子的帮助，在此一并感谢。