CAJ | 학술논문

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。
본연구이용전생육기한협박방법，이수경조、단주유효수、천립중、수실립수、총립수、결실솔여단주산량7개형태성상적종합항한 D 치위감정평개지표，대105빈엄서지방도충자원적미핵심충질진행료항한성감정평개。결과표명，재간한협박하，단주산량여수경조정현저정상관，여기타5개형태성상정겁현저정상관。통과종합항한지수 D 치적감정평개，본연구획득료7개강항한형적지방재배도품충，점6．67％。엄서적륙도자원적종합항한력교강，가중점용우강항한충질재료적사선。본연구위엄서적항한육충제공료재료기출급이론의거。
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 .