Cassava is widely consumed in many areas of Africa, including Ghana, and is a major part of most household diets. These areas are characterized by rampant malnutrition, because the tuberous roots are low in nutritional value. Provitamin A biofortified cassava varieties have been developed by the International Institute for Tropical Agriculture, but adoption of these varieties in Ghana will largely depend on their agronomic performance, including fresh root yield, dry matter content, resistance to major pests and diseases, mealiness, starch content and the stability of these traits. Eight provitamin A varieties with two white checks were planted in three environments for two seasons to determine stability and variability among the varieties for important traits. There were significant variations in performance between varieties and between environments for cassava mosaic disease, root number, fresh root yield and starch content. High broad-sense heritability and genetic advance were observed in all traits, except for storage root number, and could be exploited through improvement programs. This study identified the best performing enhanced provitamin A varieties for traits that are key drivers of variety adoption in Ghana. In view of this, some varieties can be recommended for varietal release after on-farm testing. The study also showed the possibility of tapping heterosis after careful selection of parents.

中文翻译：

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维生素A原木薯品种品质和产量特性的遗传变异性、稳定性和遗传力

木薯在非洲的许多地区被广泛食用，包括加纳，并且是大多数家庭饮食的主要部分。这些地区的特点是严重的营养不良，因为块根的营养价值很低。国际热带农业研究所开发了维生素 A 生物强化木薯品种，但这些品种在加纳的采用在很大程度上取决于它们的农艺性能，包括新鲜根产量、干物质含量、对主要病虫害的抗性、粉状、淀粉这些特征的含量和稳定性。八个具有两个白色格子的维生素 A 品种在三个环境中种植两个季节，以确定重要性状品种之间的稳定性和变异性。在木薯花叶病、根数、鲜根产量和淀粉含量方面，品种之间和环境之间的表现存在显着差异。在除贮藏根数外的所有性状中都观察到了高度的广义遗传力和遗传进步，并且可以通过改良计划加以利用。这项研究确定了性能最好的增强型维生素 A 品种，这些品种是加纳品种采用的关键驱动因素。有鉴于此，可推荐部分品种进行田间试验后放行。该研究还显示了在仔细选择亲本后挖掘杂种优势的可能性。并且可以通过改进计划加以利用。这项研究确定了性能最好的增强型维生素 A 品种，这些品种是加纳品种采用的关键驱动因素。有鉴于此，可推荐部分品种进行田间试验后放行。该研究还显示了在仔细选择亲本后挖掘杂种优势的可能性。并且可以通过改进计划加以利用。这项研究确定了性能最好的增强型维生素 A 品种，这些品种是加纳品种采用的关键驱动因素。有鉴于此，可推荐部分品种进行田间试验后放行。该研究还显示了在仔细选择亲本后挖掘杂种优势的可能性。