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Genetic Mapping Identifies Consistent Quantitative Trait Loci for Yield Traits of Rice under Greenhouse Drought Conditions

文献类型： 外文期刊

作者： Baisakh, Niranjan 1 ; Yabes, Jonalyn 1 ; Gutierrez, Andres 1 ; Mangu, Venkata 1 ; Ma, Peiyong 1 ; Famoso, Adam 2 ; Per 1 ;

作者机构： 1.Louisiana State Univ, Agr Ctr, Sch Plant Environm & Soil Sci, Baton Rouge, LA 70803 USA

2.Louisiana State Univ, Agr Ctr, Rice Res Stn, Crowley, LA 70578 USA

3.Univ Arkansas, Dept Crop & Soil Sci, Fayetteville, AR 72701 USA

4.Jiangsu Acad Agr Sci, Nanjing 210014, Jiangsu, Peoples R China

5.Plastomics Inc, St Louis, MO 63132 USA

关键词： drought; grain yield; greenhouse; panicle; QTL; rice

期刊名称：GENES （ 影响因子：4.096； 五年影响因子：4.339 ）

ISSN：

年卷期： 2020 年 11 卷 1 期

页码：

收录情况： SCI

摘要： Improving drought resistance in crops is imperative under the prevailing erratic rainfall patterns. Drought affects the growth and yield of most modern rice varieties. Recent breeding efforts aim to incorporate drought resistance traits in rice varieties that can be suitable under alternative irrigation schemes, such as in a (semi)aerobic system, as row (furrow-irrigated) rice. The identification of quantitative trait loci (QTLs) controlling grain yield, the most important trait with high selection efficiency, can lead to the identification of markers to facilitate marker-assisted breeding of drought-resistant rice. Here, we report grain yield QTLs under greenhouse drought using an F-2:3 population derived from Cocodrie (drought sensitive) x Nagina 22 (N22) (drought tolerant). Eight QTLs were identified for yield traits under drought. Grain yield QTL under drought on chromosome 1 (phenotypic variance explained (PVE) = 11.15%) co-localized with the only QTL for panicle number (PVE = 37.7%). The drought-tolerant parent N22 contributed the favorable alleles for all QTLs except qGN3.2 and qGN5.1 for grain number per panicle. Stress-responsive transcription factors, such as ethylene response factor, WD40 domain protein, zinc finger protein, and genes involved in lipid/sugar metabolism were linked to the QTLs, suggesting their possible role in drought tolerance mechanism of N22 in the background of Cocodrie, contributing to higher yield under drought.

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