中国常用水稻保持系及恢复系开花灌浆期耐热性评价

符冠富#,宋健#,廖西元, 章秀福, 熊杰, 王熹乐, 明凯, 陶龙兴*

doi:10.3969/j.issn.10017216.2011.05.007

中国水稻科学 >

2011 , Vol. 25 >Issue 5: 495 - 500

DOI: https://doi.org/10.3969/j.issn.10017216.2011.05.007

研究报告

中国常用水稻保持系及恢复系开花灌浆期耐热性评价

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中国水稻研究所水稻生物学国家重点实验室，浙江杭州 310006

收稿日期: 2011-01-12

修回日期: 2011-03-30

网络出版日期: 2011-09-10

基金资助

国家自然科学基金资助项目（30871473， 31101116）；农业部农业结构调整重大技术研究专项（060301B）；浙江省重点项目（2008C22073）；浙江省三农五方项目（SN200806）。

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Thermal Resistance of Common Rice Maintainer and Restorer Lines to High Temperature Stress During Flowering and Early Grain Filling Stages

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National Key Laboratory of Rice Biology, China National Rice Research Institute， Hangzhou 310006， China; #These authors contributed equally to this paper;

Received date: 2011-01-12

Revised date: 2011-03-30

Online published: 2011-09-10

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摘要

以我国常用的15个水稻保持系和26个丰产性较好的恢复系为材料，于主茎见穗当天起连续15 d进行高温胁迫处理（9:00-15:00，39~43 ℃），研究花期高温胁迫对水稻保持系和恢复系结实特性的影响。结果表明，根据高温胁迫指数，可把水稻品种分为热钝感型、耐热型、不耐热型和热敏感型等4个类型。其中，水稻保持系K22B、博白B和V20B为热钝感型材料，Ⅱ32B、中浙B和中9B为热敏感型材料；水稻恢复系明恢63耐热性最强，其次为R207和P929，P6222、R8006 和P51等耐热性最弱。进一步分析表明，高温胁迫指数与水稻在自然条件下结实率、空壳率和秕谷率之间相关不显著，但与胁迫环境下结实率和空壳率的相关性均达极显著水平。花期高温胁迫致使水稻保持系和恢复系结实率下降，空壳率大幅度上升。

本文引用格式

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 . DOI: 10.3969/j.issn.10017216.2011.05.007

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 ℃ 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.

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