广西地方稻种资源微核心种质的抗旱性鉴定评价  

Identification of drought resistance of landrace rice mini core germplasm in Guangxi

作　　者：夏秀忠[1] 曾宇[1] 李丹婷[1] 农保选[1] 刘开强[1] 陈仁天[1] 邓国富[1] 

机构地区：[1]广西壮族自治区农业科学院水稻研究所,广西南宁530007

出　　处：《干旱地区农业研究》2014年第2期137-141,共5页Agricultural Research in the Arid Areas

基　　金：广西"八桂学者"专项经费项目;国家科技支撑计划(2012BAD40B04;2013BAD01B02);广西科学研究与技术开发计划项目(桂科攻1123001-3C);广西青年基金项目(2013GXNSFBA019052);广西农科院科技发展基金项目(桂农科2012JZ02)

摘　　要：本研究利用全生育期旱胁迫方法,以穗颈粗、单株有效穗、千粒重、穗实粒数、总粒数、结实率与单株产量7个形态性状的综合抗旱D值为鉴定评价指标,对105份广西地方稻种资源的微核心种质进行了抗旱性鉴定评价。结果表明,在干旱胁迫下,单株产量与穗颈粗呈显著正相关,与其他5个形态性状呈极显著正相关。通过综合抗旱指数D值的鉴定评价,本研究获得了7个强抗旱型的地方栽培稻品种,占6.67%。广西的陆稻资源的综合抗旱力较强,可重点用于强抗旱种质材料的筛选。本研究为广西的抗旱育种提供了材料基础及理论依据。A total of 105 mini core collection of rice germplasm in Guangxi were indentified through treatment of whole growth period drought stress .D value was employed as the standard of evaluation ,which was calculated according to panicle neck thick ,effective panicles per plant ,1000-grain weight ,filled grained per panicle ,panicle density ,seed setting rate ,and grain weight per plant .The results showed that ,under drought stress ,grain weight per plant showed a significant positive correlation with panicle neck thick ,and highly significant positive correlation with the other five mor-phological traits .By the evaluation of the comprehensive drought index D value ,we obtained seven local-cultivated rice varieties with high drought resistance type （6 .67% ） .Guangxi upland rice contains high percentage of high drought resis-tance resources ,which can be used for germplasm screening .The identified germplasm is of significance for improvement of rice drought resistance .

关 键 词：广西 稻种资源 微核心种质 抗旱性 鉴定评价 

分 类 号：S332.1[农业科学—作物遗传育种]