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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Genome-wide consistent molecular markers associated with phenology, plant production and root traits in diverse rice (Oryza sativa L.) accessions under drought in rainfed target populations of the environment
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Genome-wide consistent molecular markers associated with phenology, plant production and root traits in diverse rice (Oryza sativa L.) accessions under drought in rainfed target populations of the environment

机译：在环境中雨量目标群体的干旱下，在各种稻米（Oryza Sativa L.）中的候选，植物生产和根部特征相关的基因组 - 范围一致的分子标记

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Drought is the most predominant constraint to rainfed rice production. Identifying molecular markers associated with drought resistance traits and deploying them in marker-assisted breeding will hasten the development of drought-resilient cultivars. A total of 49 diverse rice accessions, including traditional land-races, were evaluated for plant production and root traits under natural drought stress in rainfed target populations of environment (TPE) in six successive field trials from 2010 to 2015. Significant variation for phenology, plant production and root traits under drought was noticed among the accessions. Genotyping of the rice accessions using 599 polymorphic simple sequence repeat (SSR) markers showed considerable variation among them. STRUCTURE analysis grouped the 49 accessions into three subpopulations. Similarly, three clusters were observed in Neighbor joining tree created using Nei's genetic distance. The subpopulation POP1 consisted mostly of landraces, while subpopulation POP3 consisted of advanced breeding lines and POP2 accessions from all groups. Genome-wide association mapping detected 61 markers consistently associated in two or more trials with phenology, plant production and root traits under drought in TPE. The markers PSM52 (Chr 3), RM6909 (Chr 4), RM242 (Chr9) and RM444 (Chr 9) were consistently associated with grain yield and root traits under drought. The markers PSM127 (Chr 3) and PSM133 (Chr 4) were consistently associated with yield, plant height and spikelet fertility. These markers with pleiotropic and consistent associations with yield and secondary traits under drought in TPE may be robust candidates for marker-assisted breeding for drought resistance in rice.
机译：干旱是对雨水生产的最占主导地位的限制。鉴定与抗旱性性质相关的分子标记，并将其部署在标志物辅助育种中将加速干旱弹性品种的发展。在2010年至2015年的六次连续田间试验中，评估了49种不同的稻米种群，包括传统的土地种群，包括传统的土地种族，包括在环境（TPE）的天然干旱胁迫下的植物生产和根状性状。候选的显着变化，植物生产和干旱下的根特征在加入中受到注意到。使用599多态性简单序列重复（SSR）标记的水稻探剂的基因分型显示出相当大的变化。结构分析将49种进入分为三个亚步骤。同样，在使用Nei的遗传距离创建的邻居加入树中观察到三种簇。亚群POP1主要由LACERACES组成，而亚群POP3则由所有组的先进的育种线和POP2加载组成。基因组 - 宽协会映射检测到61个标记，其在TPE中干旱下的两种或多种试验中始终如一或更多的试验。标记物PSM52（CHR 3），RM6909（CHR 4），RM242（CHR9）和RM444（CHR 9）始终如一与干旱下的籽粒产量和根部性状相关。标记物PSM127（CHR 3）和PSM133（CHR 4）始终如一与产率，植物高度和小穗生育能力相关。这些标志物具有抗磷酸和一致的与TPE干旱的产量和二次性状的关联可能是用于在水稻中的抗旱抗性的标记辅助育种的稳健候选者。

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