水稻生殖期干旱胁迫下高产基因的优势单倍型。

IF 5.6 2区 生物学 Q1 PLANT SCIENCES
Preeti Singh, Bandana Pahi, Krishna T Sundaram, Niranjani Gnanapragasam, Sonali Vijay Habde, Nandigam Vinay Kumar, Namrata Devidas Patil, Pronob J Paul, Ravi Shekhar Kumar, Suresh Prasad Singh, Sanjay Kalia, Arvind Kumar, Ajay Kohli, Uma Maheshwar Singh, Vikas Kumar Singh, Pallavi Sinha
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引用次数: 0

摘要

了解生殖期抗旱性(RSDT)的遗传基础需要将基因组变异与表型联系起来。本研究采用了全基因组关联研究(GWAS),利用450个水稻材料在三个地点和两个季节的生殖期干旱胁迫下的粮食产量进行研究。结果发现67个标记-性状关联(mta)对应23个候选基因。10个rsdt相关基因的优势单倍型包括SAP-H22、WRKY109-H6、OsIRO2-H3、ossobirr - h68、OsPGL31-H8、OsDAHPS1-H2、ZCD-H13、OsMC2-H8、Ospdr9-H16和SDR-H2。这些基因参与胁迫相关的过程,如转录调控、细胞壁结构修饰、叶片滚动、细胞程序性死亡、氧化还原应激和次生代谢物积累。值得注意的是,将来自OsIRO2-H3基因的优秀单倍型渗入到优秀水稻品种中,其产量优势比复发亲本高出25.0%至27.3%。这些发现突出了这些基因作为培育高产耐旱水稻品种的宝贵资源的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Superior haplotypes of genes associated with higher grain yield under reproductive stage drought stress in rice.

Understanding the genetic basis of reproductive stage drought tolerance (RSDT) requires bridging genomic variations with phenotype. This study employed a genome-wide association study (GWAS) using 450 rice accessions for grain yield under reproductive stage drought stress across three locations and two seasons. Results revealed 67 marker-trait associations (MTAs) that corresponded to 23 candidate genes. Superior haplotypes identified for ten RSDT-related genes including SAP-H22, WRKY109-H6, OsIRO2-H3, OsSOBIR-H68, OsPGL31-H8, OsDAHPS1-H2, ZCD-H13, OsMC2-H8, Ospdr9-H16, and SDR-H2.These genes are involved in stress related processes such as transcription regulation, cell wall structure modification, leaf rolling, programmed cell death, redox stress and secondary metabolite accumulation. Notably, introgressing superior haplotypes from the OsIRO2-H3 gene into elite rice cultivar led to yield advantage of 25.0 % to 27.3 % over recurrent parents. These findings highlight the potential of these genes as valuable resources for breeding high-yielding, drought-tolerant rice varieties.

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来源期刊
Journal of Experimental Botany
Journal of Experimental Botany 生物-植物科学
CiteScore
12.30
自引率
4.30%
发文量
450
审稿时长
1.9 months
期刊介绍: The Journal of Experimental Botany publishes high-quality primary research and review papers in the plant sciences. These papers cover a range of disciplines from molecular and cellular physiology and biochemistry through whole plant physiology to community physiology. Full-length primary papers should contribute to our understanding of how plants develop and function, and should provide new insights into biological processes. The journal will not publish purely descriptive papers or papers that report a well-known process in a species in which the process has not been identified previously. Articles should be concise and generally limited to 10 printed pages.
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