干旱地区农业研究Issue(4)：181-189,9.DOI:10.7606/j.issn.1000-7601.2015.04.28
云南主栽玉米品种抗旱性鉴定与评价
Identification and evaluation of drought resistance in different maize varieties widely grown in Yunnan
摘要
Abstract
This research took eight main maize varieties in Yunnan (Tiannuo888 ,Yunnuo6 ,Yunrui999 ,Yunrui6 , Yunrui47 , Yunrui88 , Yunyou105 , and Yuntianyu2 ) as materials to investigate possible influences caused by water stress . A pot experiment was conducted to examine 14 morphological and biochemical indexes (plant height , fresh weight ,ratio of root to shoot ,POD ,and SOD etc .) that were related to drought resistance under two levels of water con-tent (70% ~80% and 50% ~60% of field moisture capacity ) at seedling ,flowering and filling stages of the maize vari-eties .Capabilities in drought resistance of varieties under water stresses were scored by the drought coefficient and subor-dinate function value methods .The results showed that the same index of drought resistance characterized in different maize varieties at various stages existed differences ,and 8 maize varieties were divided into three grades :high tolerant , weaker tolerant ,and drought susceptible .The high-tolerant cultivars include Yunrui47 ,Yunyou105 and Yuntianyu2;The varieties with weaker drought resistance were Yunrui 6 ,Yunrui88 and Yunrui999 .However ,Tiannuo888 and Yunn-uo6 were drought susceptible .Moreover ,all morphological and biochemical indexes and their comprehensive D-values could be taken as evaluation criteria at seedling stage of maize varieties under water stress .From seeding to flowering stages ,under water stress ,only plant height ,leaf area ,SOD and Pro showed significant correlations with drought resis-tance indexes .From flowering to filling stages ,under water stress ,significant correlations between shoot fresh weight , plant height and MDA and drought resistance could be observed .No matter what growth stages the maize varieties were at ,seeding ,florescence or filling stages ,underwater stress ,the comprehensive D -value of the indexes had a significant correlation with drought resistance ,which could be used to identify maize drought resistance ,nevertheless any single in-dex .关键词
玉米/主栽品种/综合评价/干旱胁迫/抗旱性Key words
maize/varieties grown in production/comprehensive evaluation/water stress/drought resistance分类
农业科技引用本文复制引用
杜彩艳,陈拾华,杨艳鲜,段宗颜,张乃明,丘学礼,胡万里,陈安强,付斌,潘艳华,余小芬..云南主栽玉米品种抗旱性鉴定与评价[J].干旱地区农业研究,2015,(4):181-189,9.基金项目
国家科技支撑计划（2012AD4002）；国家科技支撑计划 （）
