穗颈维管性状与产量相关性状的遗传分析
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1 华中农业大学植物科学技术学院,武汉 430070; 2 华中农业大学作物遗传改良重点实验室,武汉 430070

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基金项目:

湖北省自然科学基金项目( 2019CFC851);中央高校基本科研业务费专项资金项目( 2662016QD040, 2662018YJ025);国家自然科 学基金( 31971864)


Genetic Analysis of Vascular Bundle-Related Traits of Neck-panicle and Yield Traits
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1College of Plant Science and Technology of Huazhong Agricultural University, Wuhan 430070; 2 National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070

Fund Project:

Natural Science Foundation of Hubei Province of China( 2019CFC851), Fundamental Research Funds for the Central Universities( 2662016QD040, 2662018YJ025), National Natural Science Foundation of China( 31971864)

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    摘要:

    穗颈维管性状是实现“源”合成的同化物输送至籽粒中的唯一通道。本研究利用来源于籼稻 93-11( 受体)和粳稻 日本晴( 供体)构建的染色体片段代换系群体,调查穗颈维管性状与穗部产量性状。结果表明,大部分穗颈维管性状与穗部 产量性状呈显著相关; 7 个穗颈维管性状共检测到 42 个 QTL,其中 16 个位点日本晴等位基因起增效作用; 6 个穗部产量性状 共检测到 45 个 QTL,其中 14 个位点日本晴等位基因起增效作用。综合分析穗颈维管性状与产量性状的 QTL 定位区间,发 现有 6 个同时调控穗颈维管性状和穗部产量性状的 QTL 簇,结合已有报道与候选基因序列分析,推测一因多效基因 Ghd7 和 IPA1 可能分别调控第 7 染色体 9 Mb 和第 8 染色体 25 Mb 的 QTL 簇。这些结果表明了水稻穗颈维管性状和产量性状既存在 不同的遗传基础,也存在共同的遗传机制。挖掘更多控制“流”的 QTL 与同时调控“流”和“库”的一因多效基因可为水稻聚 合育种、品种改良提供十分重要的理论与实践意义。

    Abstract:

    Neck-panicle is the only channel for assimilation substance that transports to the panicle. In this study, 122 chromosome segment substitution lines( CSSL) derived from the cross between indica rice variety 93- 11 and japonica rice variety Nipponbare were used to investigate vascular bundle-related traits of neck-panicle and yield traits. The results showed significant correlation between vascular bundle-related traits of neck-panicle and yield traits. A total of 42 quantitative trait loci( QTL) of vascular bundle-related traits and 45 QTL of yield traits were detected. Among them, 16 and 14 chromosomal regions with positive allelic effects were from Nippnbare and 93-11, respectively. Gained from the QTL mapping results of these two types of traits, six QTL clusters that regulate both vascular bundle-related and yield traits have been identified. Based on previous studies and the candidate gene analysis, two pleiotropic genes Ghd7 at the 9 Mb site of chromosome 7 and IPA1 at the 25 Mb site of chromosome 8 might be candidate, respectively. These results suggested a diversified genetic basis with partial common genetic mechanism for both rice vascular bundle-related traits and yield traits. Exploration of additional QTLs controlling“flow” and multiple genes regulating the interaction between“flow” and“sink” might provide theoretical and practical significance in rice breeding.

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袁绍文,孙文强,王电文,等.穗颈维管性状与产量相关性状的遗传分析[J].植物遗传资源学报,2021,22(1):183-193.

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历史
  • 收稿日期:2020-04-04
  • 最后修改日期:2020-05-12
  • 录用日期:2020-07-21
  • 在线发布日期: 2021-01-07
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