中国水稻科学 ›› 2011, Vol. 25 ›› Issue (5): 495-500.DOI: 10.3969/j.issn.10017216.2011.05.007

• 研究报告 • 上一篇    下一篇

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*   

  1. 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 出版日期:2011-09-10 发布日期:2011-09-10
  • 通讯作者: 陶龙兴*
  • 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)。

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

FU  Guanfu# , SONG  Jian# , LIAO Xiyuan, ZHANG Xiufu, XIONG  Jie, WANG  Xi, LE  Mingkai, TAO  Longxing*   

  1. National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China; #These authors contributed  equally to this paper;
  • Received:2011-01-12 Revised:2011-03-30 Online:2011-09-10 Published:2011-09-10
  • Contact: TAO Longxing*

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。

关键词: 水稻font-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">︱保持系font-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">︱ 恢复系font-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">︱高温胁迫font-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">︱育性分析

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.

Key words:  ricefont-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">︱maintainer linefont-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">︱restorer linefont-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">︱high temperature stressfont-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">︱fertility 

中图分类号: