Cassava Breeding Trials - Edaphoclimatic Zone 5: Tropical; High Altitude

Cassava germplasm development at CIAT is centered on the development of improved gene pools for specific edapho-climatic zones with importance for cassava production. The most relevant ecosystems are the semi-and and sub-humid tropics, for which the majority of efforts are devoted. The main selection activity is conducted in sites selected to represent the conditions of the target ecosystem. For each zone, a recurrent selection program with a progressive set of stages is followed. As the stages progress more emphasis is given to traits of lower heritability, because more planting material for each genotype is available and the evaluation can be conducted in bigger plots with replications. Certain selection criteria are of general Importance across ecosystems (i.e. yield potential, dry matter content), while others are specific for each ecosystem (i e. specific pests and/or diseases). This dataset provides CIAT cassava breeding trial data for activities conducted in the Cool, tropical highland areas, with mean temperatures of approximate 17-20°C., zone国际热带农业中心（CIAT）开展的木薯种质资源研发工作，以针对木薯生产具有重要意义的特定土壤气候区构建改良基因库为核心目标。当前最受重视的生态系统为半干旱与亚湿润热带区，绝大多数研发精力均投入于此区域。核心选择鉴定工作均在能够代表目标生态系统环境条件的试验站点开展。针对每个目标区域，均采用分阶段递进的轮回选择程序。随着试验阶段推进，筛选重点将逐步转向遗传力较低的性状——这是因为此时各基因型的种植材料数量更为充足，可在面积更大、设置重复的试验小区中开展性状评价。部分选择标准在各生态系统中具有普适性，例如产量潜力、干物质含量；而另有部分标准则仅适用于特定生态系统，如特定病虫害。本数据集涵盖了在平均气温约17-20℃的凉爽热带高地开展的CIAT木薯育种试验相关数据。