Genetic variability of three cassava traits across three locations in Ghana
Genetic variability of three cassava traits across three locations in Ghana
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加纳三个地点三种木薯性状的遗传变异
DOI：
10.5897/ajps12.058
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
E. Parkes
中科院分区：
文献类型：
--
作者：
Peprah Bright Boakye;O. Kwadwo;K. Isaac;E. Parkes
进行了一项研究，以评估两年内三个地点的五种木薯基因型的鲜根重量、根数和顶部重量的遗传变异程度、广义遗传力和相关性。方差的组合分析揭示了所有性状的高度显着的基因型效应。基因型与环境的相互作用对于所有研究的性状也很重要，表明基因型对环境的反应相当大但各不相同。鲜根重量观察到高广义遗传力和遗传进展（占平均值的百分比），表明该性状主要受遗传控制，并且简单的循环表型选择方案将是有益的。所有性状的表型变异系数值均大于其相应的基因型变异系数值。这三个性状之间的相关性非常显着并且呈正相关，表明这三个性状的同时进步是可行的。
A study was conducted to assess the extent of genetic variability, broad-sense heritability and correlations for fresh root weight, root number and top weight of five cassava genotypes across three locations in 2 years. Combined analysis of variance revealed highly significant genotypic effect for all the traits. Genotype x environment interaction was also significant for all the traits studied indicating considerable but, varying response of the genotypes to the environments. High broad-sense heritability and genetic advance as percent of the mean were observed for fresh root weight, suggesting that the trait is primarily under genetic control and that a simple recurrent phenotypic selection scheme would be rewarding. Phenotypic coefficients of variation values were larger than their corresponding genotypic coefficient of variation values for all traits. Correlations between the three traits were highly significant and positive indicating that simultaneous progress for the three traits is feasible.