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首页> 外文期刊>Indian Journal of Plant Genetic Resources >Genetic Analysis of Staygreen Trait and its Association with Morpho-physiological Traits under Water Deficit Stress in Wheat
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Genetic Analysis of Staygreen Trait and its Association with Morpho-physiological Traits under Water Deficit Stress in Wheat

机译：水分亏缺胁迫下小麦保持绿性状的遗传分析及其与形态生理性状的关联

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摘要

The present study was conducted to assess the relation of staygreen trait with yield attributes and physiological traits under water deficit condition in wheat and to identify genetically diverse and agronomically desirable functional staygreen parents for incorporation in the breeding programmes for the development of drought tolerant genotypes. Heritability estimates along with genetic advance are high for leaf senescence rate (LSR). Present study also demonstrated significant positive associationof staygreen trait LSR with RWC, photosynthetic rate, ear weight, thousand kernel weight and grain yield. Grouping genotypes for drought tolerance and staygreen trait suggested, CHIRYA7 as the most drought tolerant (DSI = 0.58) staygreen genotype (LSR=0.13) and CBW38 as drought susceptible (DSI = 1.12 ) fast senescing (0.48) genotype. D2-clustering grouped the genotypes into six clusters on the basis of similarity in the traits studied. Cluster III genotypes display staygreen character because it exhibited maximum cluster mean for photosynthetic rate, grain yield, test weight, SCMR, ear weight, biological yield, RWC and minimum cluster mean for DSI and LSR. There is a maximum intercluster distance between Cluster III and cluster VI hence staygreen genotypes from cluster III viz. CHIRYA7, HW2041 can be selected and crossed with cluster VI genotypes viz. HW2063 for incorporation of functional staygreen trait for development of drought tolerant genotypes. The clustering of genotypes will help to identifydivergent genetic material for obtaining highly heterotic functional staygreen wheat hybrid for drought condition.
机译：本研究旨在评估小麦缺水条件下保持性状与产量和生理性状之间的关系，并确定遗传多样性和农学上合乎需要的功能性保持性亲本，以便将其纳入耐旱基因型育种计划中。对叶片衰老率（LSR）的遗传力估计以及遗传进步很高。目前的研究还表明，保持绿色性状LSR与RWC，光合速率，穗重，千粒重和籽粒产量呈显着正相关。建议将基因型分组为耐旱性和保持绿色性状，CHIRYA7是最耐旱的（DSI = 0.58）保持绿色基因型（LSR = 0.13），而CBW38是最易受干旱影响（DSI = 1.12）的快感（0.48）基因型。基于研究性状的相似性，D2聚类将基因型分为六个簇。聚类III基因型表现出保持绿色的特征，因为它显示出光合速率，籽粒产量，容重，SCMR，穗重，生物产量，RWC的最大聚类平均值和DSI和LSR的最小聚类平均值。群集III和群集VI之间存在最大群集间距离，因此来自群集III viz的保持绿色基因型。可以选择CHIRYA7，HW2041，并与簇VI基因型viz杂交。 HW2063用于整合功能性耐候性状以开发耐旱基因型。基因型的聚类将有助于鉴定不同的遗传物质，以获得用于干旱条件的高度杂种功能性永生小麦杂交种。

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