Rice,Panicle,Apical abortion,QTL,Genetic analysis,"/> 水稻穗顶部退化突变体L-05261的遗传分析
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作物学报 ›› 2011, Vol. 37 ›› Issue (11): 1935-1941.doi: 10.3724/SP.J.1006.2011.01935

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

水稻穗顶部退化突变体L-05261的遗传分析

高素伟，张玲，毛毕刚，王久林，程治军*，万建民   

  1. 中国农业科学院作物科学研究所，北京100081
  • 收稿日期:2011-03-04 修回日期:2011-06-25 出版日期:2011-11-12 网络出版日期:2011-09-06
  • 通讯作者: 程治军, E-mail: chengzj5rs@yahoo.com.cn
  • 基金资助:

    本研究由国家转基因生物新品种培育科技重大专项项目(2009ZX08009-104B)，国家自然科学基金项目(30871498)和国家重点基础研究发展计划(973计划)项目(2010CB125904)资助。

Genetic Analysis of Rice Mutant L-05261 with Panicle Apical Abortion Trait

GAO Su-Wei,ZHANG Ling,MAO Bi-Gang,WANG Jiu-Lin,CHENG Zhi-Jun*,WAN Jian-Min   

  1. Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2011-03-04 Revised:2011-06-25 Published:2011-11-12 Published online:2011-09-06
  • Contact: 程治军, E-mail: chengzj5rs@yahoo.com.cn

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被引次数

15

摘要： 稻穗顶部小穗退化降低单株产量，严重影响水稻单产。对穗顶部明显退化材料L-05261的研究表明，小穗退化可能与稻穗内部过氧化氢的积累有关。2个非穗顶部退化品种和2个轻微穗顶部退化品种与L-05261杂交所得F1植株稻穗顶部都呈现穗退化表型，F2群体的小穗退化率均呈连续分布，但表型偏向非穗退化亲本。在组合L-05261×IRAT129 F2群体中，顶部小穗退化与非退化单株的比例适合63︰1；同一组合的BC1F1回交群体中，顶部小穗退化与非退化植株比例接近7︰1。表明穗顶部小穗退化表型受3对或3对以上显性或部分显性基因控制。利用上述群体中的182个单株，在第3、第4、第5、第8染色体上分别检测到qPAA3、qPAA4、qPAA5和qPAA8 4个QTL，它们之间不存在互作，合计可解释46.32%的表型变异，其余的表型变异可能是由环境条件的变化造成的。

关键词: 水稻, 顶部退化, QTL, 遗传分析

Abstract: In rice, panicle apical abortion (PAA) has a detrimental effect on the final yield. Using one PAA mutant L-05261, we found that the occurrence of PAA is related to the excess accumulation of hydrogen peroxides (H2O2). The hybrid plants of four cross-combinations from two less PAA varieties of 9311, PA64, and two non-PAA varieties of Balilla and IRAT129 crossed to L-05261 showed PAA phenotypes, on their F2 populations, the percentages of PAA showed a continuous distribution and a bias towards non-PAA parents. The ratio of PAA plants and non-PAA plants in the L-05261×IRAT129 F2 fitted to 63:1, while the ratio in the BC1F1consisted of 7:1, corresponding to a genetic model involving three or more partial dominant genes. One hundred and eighty-two individuals from F2 of L-05261×IRAT129 were employed for QTL analysis, and four QTLs designated as qPAA3, qPAA4, qPAA5, and qPAA8 respectively, were detected out.However, no significantinteraction was found among these QTLs. Totally, all four QTLs were able to explain 46.32% of observed phenotypic variation. The remaining phenotypic variation was likely caused by environment effect, which should be considered in the following study.

Key words: font-family: "Times New Roman", mso-fareast-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, Rice')">mso-bidi-language: AR-SA">Rice, Panicle, Apical abortion, QTL, Genetic analysis

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