华南农业大学学报Issue(2)：13-18,6.
云南省不同小麦资源种子萌发期抗旱性相关性状差异及与抗旱指数、抗旱系数的相关性
Drought resistant characters during germination of different wheat germplasm in Yunnan Province and their correlations with the index and coefficient of drought resistance
摘要
Abstract
[Objective]To explore indicative characters for predicting drought resistance in the whole growing period of different wheat germplasm in Yunnan Province at seed germination stage by simulating drought stress .[Method] Six germination characters associated with drought resistance , including germi-nation energy , germination rate , number of radicels , length of maximal radicels , length of coleoptiles and length of embryos among 70 accession wheat materials of Yunnan with 5 subspecies in 2 species , were studied under water and hypertonic solution of polyethylene glycol ( PEG-6000 ) described by GB/T21127-2007 treatment conditions .Moreover, the correlations between observed average values and rela-tive values of six germination characters and indexes and coefficients of drought resistance were analyzed .[Result and conclusion] Among 5 subspecies , most of the observed average values and relative values of six germination characters did not show consistently significance in the whole growing period between vari -eties of drought resistance and highly drought resistance and the control of Yunxuan 11-12 of highly weak resistance , between varieties of drought resistance and highly drought resistance and varieties of middle resistance or between drought resistance and highly drought resistance and weak and highly weak resist -ance.Accordingly, most of the observed average values and relative values did not indicate conformable significance to their relative indexes and coefficients of drought resistance in the whole growing period . These results show that it is impossible to filter out the varieties of drought resistance and highly drought resistance in the whole growing period among all subspecies just depending on a single associated germi -nation character of drought resistance .Thus, the breeding materials of different subspecies with drought resistance and highly drought resistance should be screened out by a combination of some germination characters ( relative number of radicels , relative length of maximal radicels , relative length of coleoptiles and relative length of embryos , and ratios of length of radicels-embryos) associated with drought resist-ance and indexes and coefficients of drought resistance .关键词
小麦/种子萌发期/抗旱性状/抗旱系数/抗旱指数/相关性Key words
wheat/seed germination stage/drought resistance character/drought resistance index/drought resistance coefficient/correlation分类
农业科技引用本文复制引用
周国雁,伍少云,隆文杰,雷涌涛..云南省不同小麦资源种子萌发期抗旱性相关性状差异及与抗旱指数、抗旱系数的相关性[J].华南农业大学学报,2015,(2):13-18,6.基金项目
云南高层次科技人才培引工程（2010CI120）；国家农作物种质资源平台（云南2012-030）；云南省农业科学院专项 （）
