中国稻米

中国稻米

• 专论与研究 • 上一篇    下一篇

以种子电导率为指标定位水稻耐储藏QTL

  1. 浙江农林大学农业与食品科学学院，杭州 311300
  • 出版日期:2020-01-20 发布日期:2020-01-20
  • 通讯作者: 吴洪恺
  • 基金资助:

    浙江省农业（粮食）新品种选育重大科技专项（2016C02050-2）

Mapping of QTL for Rice Storability Based on Seed Electric Conductivity

  • Online:2020-01-20 Published:2020-01-20

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摘要：

水稻长时间储藏后，种子活力下降，稻米品质劣变，往往造成重大损失。开展水稻耐储藏研究，遗传改良水稻的耐储藏特性越来越受到重视。本研究以秀水134为背景亲本，以扬稻6号为供体亲本构建的BC3F2高代回交群体为材料，以电导率为指标进行表型-分子标记基因型的单因素方差分析，来定位耐储藏QTL。以-log10（P）>2为阈值，共检测到16个耐储藏相关的QTL。其中，RM5455（相对加性效应为-12.93%）、RM1132（相对加性效应-13.76%）和RM248（相对加性效应-14.66%）位点区域均存在着效应较大的耐储藏QTL。

关键词: 水稻, 耐储性, 电导率, QTL, 高代回交群体

Abstract:

 Prolonged storage of rice tends to cause a lot of losses due to deterioration in seed vigor and grain quality. More and more attention is paid to genetic improvement of rice storability through carrying out genetic research on storability. In this study, an advanced backcross population was developed with Xiushui 134 as the background parent and Yangdao 6 as the donor parent. The one-way analysis of variance based on phenotype-molecular genotype was applied to map the QTLs for storability. A total of 16 QTLs associated with storability were detected at threshold value of -log10（P）>2. Among them, three major QTL were detected on the locus of RM5455 （the relative effect is -12.93%）, RM1132 （the relative effect is -13.76%） and RM248 （the relative effect of -14.66%）.

Key words: rice, storability, electric conductivity, QTL, advanced backcross population

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