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首页> 外文期刊>International Journal of Plant Breeding and Genetics >Variability, Heritability and Genetic Advance in Egyptian Sweet Melon (Cucumis melo var. aegyptiacus L.) Under Water Stress Conditions
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Variability, Heritability and Genetic Advance in Egyptian Sweet Melon (Cucumis melo var. aegyptiacus L.) Under Water Stress Conditions

机译：水分胁迫下埃及甜瓜（Cucumis melo var。aegyptiacus L.）的变异性，遗传力和遗传进展

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摘要

The objective of the study was to generate genetic information, which can help in breeding sweet melon cultivars with improved drought tolerance. Thirteen sweet melon genotypes collected from different places in Egypt were evaluated for variability, heritability and genetic advance. The experimental material was sown in a randomized complete blocks design with three replicates under irrigation as well as drought stress conditions. Significant differences were observed among genotypes for all the studied traits under normal irrigation and water stress. The irrigationxgenotypes interactions were found to be significant for all the studied traits except fruit length. The estimates of phenotypic coefficient of variation were higher than the estimates ofgenotypic coefficient of variation for all the characters, which suggested that the apparent variation is not only due to the genotypes but also due to the influence of environment. High heritability coupled with high genetic advance was noted for fruitweight and yield per plant. This provided that these parameters were under the control of additive genetic effects. This indicates that selection should lead to fast genetic improvement of the material. Moreover, magnitude of mean performance for all the traits decreased in water stress environment. Fruit length was very less affected by water stress, but yield per plant was very high affected by water stress.
机译：该研究的目的是产生遗传信息，从而有助于育种具有改善的耐旱性的甜瓜品种。评价了从埃及不同地区收集的13种甜瓜基因型的变异性，遗传力和遗传进展。实验材料以随机完整块设计进行播种，在灌溉和干旱胁迫条件下进行三个重复。在正常灌溉和水分胁迫下，所有研究性状的基因型之间均存在显着差异。灌溉x基因型之间的相互作用对除果实长度以外的所有研究性状均具有重要意义。表型变异系数的估计值高于所有性状的基因型变异系数的估计值，这表明表观变异不仅是由于基因型，还因为环境的影响。高遗传力和高遗传优势被认为是每株植物的果实重量和产量。这提供了这些参数在加性遗传效应的控制下。这表明选择应该导致材料的快速遗传改良。此外，在水分胁迫环境下，所有性状的平均表现幅度均降低。水分胁迫对果实长度的影响很小，但是水分胁迫对单株产量的影响很大。

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