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首页> 外文期刊>African Journal of Agricultural Research >Combining ability analysis and heterosis in a diallel cross of okra (Abelmoschus esculentus L. Moench)
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Combining ability analysis and heterosis in a diallel cross of okra (Abelmoschus esculentus L. Moench)

机译：黄秋葵（Abelmoschus esculentus L.Moench）的二叉杂交的结合能力分析和杂种优势

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The genetic basis of yield and its components were studied using a 9 × 9 diallel cross techniques according to Griffing’s Method 2, Model 1 in 2007.? The 36 F1’s and the 9 parents were evaluated in 2 locations; Mubi and Yola in Adamawa State, Nigeria, in 2008 wet season in a randomized complete block design (RCBD)? replicated 3 times. The result showed significant entries, parents and crosses mean squares for all traits in the pooled analysis, suggesting that the okra population was highly variable for all the traits and therefore, would most likely respond to selection.? Significant GCA (general combining ability) and SCA (Specific combining ability) variances were also obtained in all the traits, implying that both the additive and non-additive gene effects operated in the genetic expression of the traits. The non-additive gene effect was however greater in magnitude as shown by the GCA and SCA ratios which were all less than unity.? Combining ability analysis of parent also revealed that Mothol-AE2, Mothol-AE3, Gerio-AE1 and Mothol-AE1 gave consistently high general combining ability effects for most of the traits, indicating that their cross combinations will produce desirable segregates for the improvement of yield.? Both mean performance of crosses and SCA effect identified Mothol-AE2 x Mothol-AE3, Mothol-AE1 × Mothol-AE3, Mothol-AE2 × Gerio-AE1 and Mothol-AE2 × Mothol-AE1 as the best crosses. Therefore, the mean performance of parents and crosses can be used to predict high general combining ability of parents as well as high SCA effects and heterotic effects of the crosses. The hybrid Mothol-AE2 × Mothol-AE3 exhibited heterosis of up to 23.3% in yield per plant over the higher yielding parent. This showed high performance of the hybrid over the best parent.
机译：根据格里芬（Griffing）的方法2（Model 1）在2007年使用9×9拨号杂交技术研究了产量及其组成的遗传基础。在2个地点对36名F1和9名父母进行了评估。在尼日利亚的阿达玛瓦州，Mubi和Yola在2008年雨季采用了随机完整区块设计（RCBD）？复制3次。结果显示，在汇总分析中，所有性状均具有重要的输入项，双亲和均方根，这表明秋葵种群对于所有性状均具有高度可变性，因此很可能会对选择产生反应。在所有性状中也获得了显着的GCA（一般结合能力）和SCA（特异性结合能力）方差，这意味着加性和非加性基因效应均在性状的基因表达中起作用。但是，如GCA和SCA之比均小于1所示，非加和基因效应的强度更大。亲本的结合能力分析还显示，Mothol-AE2，Mothol-AE3，Gerio-AE1和Mothol-AE1对大多数性状始终具有较高的综合结合能力效应，表明它们的交叉结合将产生理想的分离体，从而提高产量。？杂交的平均性能和SCA效果均将Mothol-AE2 x Mothol-AE3，Mothol-AE1×Mothol-AE3，Mothol-AE2×Gerio-AE1和Mothol-AE2×Mothol-AE1视为最佳杂交。因此，父母和杂交的平均表现可以用来预测父母的高综合能力以及杂交的高SCA效应和杂种效应。与高产亲本相比，杂种Mothol-AE2×Mothol-AE3的单株杂种优势最高可达23.3％。这表明杂交种比最佳亲本表现出更高的性能。

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