中国水稻科学2011，Vol.25Issue(5)：495-500,6.DOI:10.3969/j.issn.1001-7216.2011.05.007
中国常用水稻保持系及恢复系开花灌浆期耐热性评价
Thermal Resistance of Common Rice Maintainer and Restorer Lines to High Temperature Stress During Flowering and Early Grain Filling Stages
摘要
Abstract
Fifteen common rice maintainer lines and 26 high-yielding restorer lines were used to evaluate their thermal resistance and fertility during flowering and early grain filling stages. The rice plants were subjected to high temperature stress at 39 - 43 C for 1 -15 d from main stem flowering. Based on the high temperature stress index, they were divided into thermal resistant lines, semi-thermal resistant lines, semi-thermal sensitive lines and thermal sensitive lines. Therefore, the maintainer lines K22B, Bobai B and V20B belonged to thermal resistant lines, whereas Ⅱ -32B. Zhongzhe B and Zhong 9B to thermal sensitive lines. The rice restorer line Minghui 63 had the highest thermal resistance, followed by R207, P929, and the lowest thermal-resistant P62-2-2, R8006 and P51. The correlation analysis indicated that the high temperature stress index was not significantly correlated with seed-setting rate, abortive grain rate, unfilled grain rate under natural conditions, but significantly correlated with seed-setting rate and unfilled grain rate under high temperature stress. This indicated that high temperature stress occurred during flowering-early grain filling stage mainly decreased the seed setting rate and significantly increased the unfilled grain rate in both rice maintainer and restorer lines.关键词
水稻/保持系/恢复系/高温胁迫/育性分析Key words
rice/ maintainer line/ restorer line/ high temperature stress/ fertility分类
农业科技引用本文复制引用
符冠富,宋健,廖西元,章秀福,熊杰,王熹,乐明凯,陶龙兴..中国常用水稻保持系及恢复系开花灌浆期耐热性评价[J].中国水稻科学,2011,25(5):495-500,6.基金项目
国家自然科学基金资助项目(30871473,31101116) （30871473,31101116）
农业部农业结构调整重大技术研究专项(06-03-01B) （06-03-01B）
浙江省重点项目(2008C22073) （2008C22073）
浙江省三农五方项目(SN200806). （SN200806）
