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首页> 外文期刊>Journal of Experimental Botany >Characterising root trait variability in chickpea (Cicer arietinum L.) germplasm
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Characterising root trait variability in chickpea (Cicer arietinum L.) germplasm

机译：表征鹰嘴豆（Cicer Arietinum L.）种质的根瘤性变异性

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Chickpea (Cicer arietinum L.) is an important grain legume crop but its sustainable production is challenged by predicted climate changes, which are likely to increase production limitations and uncertainty in yields. Characterising the variability in root architectural traits in a core collection of chickpea germplasm will provide the basis for breeding new germplasm with suitable root traits for the efficient acquisition of soil resources and adaptation to drought and other abiotic stresses. This study used a semi-hydroponic phenotyping system for assessing root trait variability across 270 chickpea genotypes. The genotypes exhibited large variation in rooting patterns and branching manner. Thirty root-related traits were characterised, 17 of which had coefficients of variation >= 0.3 among genotypes and were selected for further examination. The Pearson correlation matrix showed a strong correlation among most of the selected traits (P = 0.05). Principal component analysis revealed three principal components with eigenvalues >1 capturing 81.5% of the total variation. An agglomerative hierarchical clustering analysis, based on root trait variation, identified three genotype homogeneous groups (rescaled distance of 15) and 16 sub-groups (rescaled distance of 5). The chickpea genotypes characterised in this study with vastly different root properties could be used for further studies in glasshouses and field trials, and for molecular marker studies, gene mapping, and modelling simulations, ultimately aimed at breeding germplasm with root traits for improved adaptation to drought and other specific environments.
机译：鹰嘴豆（Cicer Arietinum L.）是一个重要的谷物豆类作物，但其可持续生产受到预测的气候变化挑战，这可能会增加产量的产量局限和不确定性。表征鹰嘴豆种质核心收集中的根系结构性状的变异将为培育新种质的基础，以适当的根特征为有效地收购土壤资源和适应干旱和其他非生物应激。该研究使用了半水培素表型系统，用于评估跨270只鹰嘴豆基因型的根瘤性变异性。基因型表现出生根模式和分支方式的大变化。特征在于三十根相关的性状，其中17个在基因型中具有变异系数> = 0.3，并选择进一步检查。 Pearson相关基质在大多数所选性状之间显示出强烈的相关性（P <= 0.05）。主成分分析显示了特征值的三个主要成分> 1捕获总变异的81.5％。基于根部性状变异，鉴定了三种基因型均相（重新分配为15）和16个亚组（重新缩小距离为5）。本研究表征的鹰嘴豆基因型具有巨大不同的根特性，可用于进一步研究玻璃静脉和现场试验，以及用于分子标记研究，基因测绘和模拟模拟，最终旨在育种具有根性状的种质，以改善对干旱的改编和其他特定环境。

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