Research Progress on Fine Mapping of QTLs for Yield Components of Rice

doi:10.15933/j.cnki.1004-3268.2022.08.001

Abstract

Abstract: Rice is one of major food crops，and its yield is very important for world food security.The yield components are key regulating factors for improvement of rice yield，which are often manifested as complex quantitative traits controlled by multiple genes. It is of great significance to explore favorable yield genes for high yield of rice. QTL mapping is an important method for identifying genes associated with excellent agronomic traits in crops.This paper elaborated the strategies of QTL fine mapping and population selection，reviewed the research progress on QTL fine mapping of three key yield components of rice，namely panicle number，grain number per panicle and grain weight，map⁃based cloning and functional analysis，and put forward the breeding strategy of rational utilization of rice yield component genes，so as to provide reference and theoretical basis for cloning excellent yield traits genes and unraveling the genetic mechanisms of yield traits in rice.

Key words: Rice, Yield components, QTL, Fine mapping, Gene cloning, Panicle number, Grain number per panicle, Grain weight

摘要： 水稻是世界上重要的粮食作物之一，其产量在全球粮食安全中发挥着重要作用。产量构成因素是水稻增产的关键因素，为多基因控制的复杂数量性状，挖掘有利的产量基因对水稻高产具有重要意义。QTL定位是作物农艺性状优异基因挖掘的重要方法。阐述了QTL精细定位策略与群体选择，综述了水稻产量构成因素穗数、穗粒数、粒质量QTL精细定位、图位克隆和功能分析的研究进展，并提出合理利用水稻产量构成因素基因的育种策略，为水稻产量性状优异基因克隆和遗传机制解析提供理论依据。

关键词: 水稻, 产量构成因素, QTL, 精细定位, 基因克隆, 穗数, 穗粒数, 粒质量

CLC Number:

S511

BAI Tianliang, LI Jie, RAN Jie, YANG Hui, QIAO Chengbin, LI Peifu, TIAN Lei. Research Progress on Fine Mapping of QTLs for Yield Components of Rice[J]. Journal of Henan Agricultural Sciences, 2022, 51(8): 1-8.

白天亮, 李杰, 冉杰, 杨辉, 乔承彬, 李培富, 田蕾. 水稻产量构成因素QTL 精细定位的研究进展[J]. 河南农业科学, 2022, 51(8): 1-8.

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