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首页> 外文期刊>Australian Journal of Crop Science >Genetic diversity in new chickpea accessions for fusarium wilt resistance, canopy temperature and yield components under drought milieus
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Genetic diversity in new chickpea accessions for fusarium wilt resistance, canopy temperature and yield components under drought milieus

机译：干旱环境下鹰嘴豆新品种对枯萎病抗性，冠层温度和产量构成的遗传多样性

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Chickpea fusarium wilt is one of the major causes of low productivity under water deficit environments in Pakistan. Searching newly developed chickpea genotypes for the desirable recombinants possessing wilt resistance along with other yield components was the objective of this experiment. Sixty accessions were laid out in an alpha lattice design with two replications. Analysis of variance for various traits revealed significant diversity among the genotypes which can be exploited for the development of superior chickpea segregants in productivity improvement programs. High to moderate estimates of heritability and genetic advance were recorded for fusarium wilt incidence, days to 50% flowering, total branches per plant, pods per plant, 100-seed weight, grain yield and harvest index. Significant relationship of grain yield with these characters was further established by means of principal component analysis. First four PCs out of total ten achieved eigenvalues > 1 and explained 75.5% of overall variability. Days to 50% flowering, 100-seed weight and grain yield contributed highest weight on PC1 that explained 31.80% of total variation. PC2 described 21.60% of digression and was mainly related to pods per plant, plant height and canopy temperature. Cluster analysis classified the genotypes into 3 clusters with maximum 33 genotypes in cluster II. Cluster I comprised of drought tolerant accessions based on canopy temperature while cluster III consisted of bold seeded genotypes regarding 100-seed weight. Cluster II incorporated wilt resistant, early flowering yet late maturing genotypes having highest pods per plant, grain yield and harvest index. D2 statistics further confirmed the versatility of cluster II genotypes over cluster I and III for most of the studied characters.
机译：在巴基斯坦缺水的环境下，鹰嘴豆枯萎病是造成生产力低下的主要原因之一。在新开发的鹰嘴豆基因型中寻找具有枯萎抗性以及其他产量成分的理想重组体是本实验的目的。 60个种质以α晶格设计布局，重复两次。各种性状的方差分析表明，基因型之间存在显着差异，可在生产力提高计划中利用这些基因型开发鹰嘴豆分离物。记录了镰刀菌枯萎病发病率，开花至50％的天数，每株植物的总枝数，每株植物的豆荚，100种种子的重量，籽粒产量和收获指数的高至中等的遗传力和遗传进展估计值。通过主成分分析进一步建立了籽粒产量与这些性状的重要关系。总共十个样本中的前四个PC的特征值> 1，并解释了总变异性的75.5％。开花至50％的天数，100种子的重量和籽粒产量对PC1的贡献最大，解释了总变异的31.80％。 PC2描述了21.60％的离题，主要与每株豆荚，株高和冠层温度有关。聚类分析将基因型分为3个聚类，聚类II中最多有33个基因型。群I由基于冠层温度的耐旱材料组成，群III由100粒重的大胆种子基因型组成。聚类II结合了抗枯萎，早开花但晚熟的基因型，每株植物的豆荚，谷物产量和收获指数最高。 D2统计进一步证实了对于大多数研究特征而言，II类基因型在I类和III类上的多功能性。

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