Identifying Genetic Loci Determining Grain Yield Under Drought Stress in Rice (Oryza sativa L.)

IF 3.7 2区农林科学 Q1 AGRONOMY

Journal of Agronomy and Crop Science Pub Date : 2024-08-09 DOI:10.1111/jac.12743

Helan Baby Thomas, Satish Verulkar, Toshi Agarwal, Ritu Saxena, Sunil Kumar Verma

{"title":"Identifying Genetic Loci Determining Grain Yield Under Drought Stress in Rice (Oryza sativa L.)","authors":"Helan Baby Thomas, Satish Verulkar, Toshi Agarwal, Ritu Saxena, Sunil Kumar Verma","doi":"10.1111/jac.12743","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>Identifying the genomic regions (quantitative trait loci (QTL)) significantly linked to grain yield under drought stress could expedite the development of novel rice cultivars suited for rainfed areas through marker-assisted breeding. This study identified QTL regions linked to plant phenology and production traits by evaluating 122 recombinant inbred lines (RILs) of Danteshwari × Daggaddeshi under different environmental conditions. A consistent QTL region associated with grain yield under water stress (60.4 Mbp) was mapped on chromosome 1 between RM428 and RM24 with an LOD score of 4.0. Another QTL region (9.4 Mbp) linked to plant height under all environmental conditions was mapped on chromosome 1 between RM1-HvSSR1-87 with a LOD score of 7.5 and phenotypic variance of 25%. A core set of 402 diverse rice accessions was also evaluated under water stress conditions and subjected to genome-wide association analysis. Twelve markers linked to grain yield under drought were identified, out of which five were significantly associated with grain yield and days to flowering under drought. The markers linked to grain yield were compared between the bi-parental population and germplasm accessions to identify the common markers. Three markers (RM1, RM259 and RM201) were found to be consistently linked to drought stress across the seasons in both bi-parental population and germplasm accessions studied and could be potential candidates for application in marker-assisted selection for improving grain yield under drought stress in rice.</p>\n </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Agronomy and Crop Science","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jac.12743","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}

引用次数: 0

Abstract

Identifying the genomic regions (quantitative trait loci (QTL)) significantly linked to grain yield under drought stress could expedite the development of novel rice cultivars suited for rainfed areas through marker-assisted breeding. This study identified QTL regions linked to plant phenology and production traits by evaluating 122 recombinant inbred lines (RILs) of Danteshwari × Daggaddeshi under different environmental conditions. A consistent QTL region associated with grain yield under water stress (60.4 Mbp) was mapped on chromosome 1 between RM428 and RM24 with an LOD score of 4.0. Another QTL region (9.4 Mbp) linked to plant height under all environmental conditions was mapped on chromosome 1 between RM1-HvSSR1-87 with a LOD score of 7.5 and phenotypic variance of 25%. A core set of 402 diverse rice accessions was also evaluated under water stress conditions and subjected to genome-wide association analysis. Twelve markers linked to grain yield under drought were identified, out of which five were significantly associated with grain yield and days to flowering under drought. The markers linked to grain yield were compared between the bi-parental population and germplasm accessions to identify the common markers. Three markers (RM1, RM259 and RM201) were found to be consistently linked to drought stress across the seasons in both bi-parental population and germplasm accessions studied and could be potential candidates for application in marker-assisted selection for improving grain yield under drought stress in rice.

查看原文本刊更多论文

鉴定决定水稻（Oryza sativa L.）干旱胁迫下谷粒产量的遗传位点

通过标记辅助育种，确定与干旱胁迫下谷物产量显著相关的基因组区域（数量性状位点（QTL））可加快开发适合雨水灌溉地区的新型水稻栽培品种。本研究通过在不同环境条件下评估 122 个 Danteshwari × Daggaddeshi 的重组近交系（RIL），确定了与植物物候和产量性状相关的 QTL 区域。在 RM428 和 RM24 之间的 1 号染色体上绘制了一个与水分胁迫下谷物产量相关的一致 QTL 区域（60.4 Mbp），LOD 得分为 4.0。另一个与所有环境条件下株高相关的 QTL 区域（9.4 Mbp）被绘制在 RM1-HvSSR1-87 之间的 1 号染色体上，LOD 得分为 7.5，表型方差为 25%。在水分胁迫条件下，还对 402 个不同水稻品种的核心组进行了评估，并进行了全基因组关联分析。鉴定了 12 个与干旱条件下谷物产量相关的标记，其中 5 个与干旱条件下谷物产量和开花天数显著相关。在双亲群体和种质登录之间比较了与谷物产量相关的标记，以确定共同标记。研究发现，在所研究的双亲群体和种质材料中，有三个标记（RM1、RM259 和 RM201）在不同季节与干旱胁迫有一致的联系，可作为潜在的候选标记应用于标记辅助选择，以提高水稻在干旱胁迫下的产量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Agronomy and Crop Science 农林科学-农艺学

CiteScore

8.20

自引率

5.70%

发文量

审稿时长

7.8 months

期刊介绍： The effects of stress on crop production of agricultural cultivated plants will grow to paramount importance in the 21st century, and the Journal of Agronomy and Crop Science aims to assist in understanding these challenges. In this context, stress refers to extreme conditions under which crops and forages grow. The journal publishes original papers and reviews on the general and special science of abiotic plant stress. Specific topics include: drought, including water-use efficiency, such as salinity, alkaline and acidic stress, extreme temperatures since heat, cold and chilling stress limit the cultivation of crops, flooding and oxidative stress, and means of restricting them. Special attention is on research which have the topic of narrowing the yield gap. The Journal will give preference to field research and studies on plant stress highlighting these subsections. Particular regard is given to application-oriented basic research and applied research. The application of the scientific principles of agricultural crop experimentation is an essential prerequisite for the publication. Studies based on field experiments must show that they have been repeated (at least three times) on the same organism or have been conducted on several different varieties.