Breeding strategies in cassava production

Las raices de yuca son una fuente rica de almidón; se utilizan para consumo humano y animal y como materia prima industrial. En el programa de mejoramiento de cultivos, se han identificado algunos clones de yuca promisorios, que registran 40- 50 por ciento más rendimiento que los cv. conocidos. CTCRI liberó 6 clones de yuca para cultivo general con base en su rendimiento alto y en otras caracteristicas deseables. Entre estos, se identificaron 5 cv. de la población hibrida y uno del banco de germoplasma nativo. Los tetraploides, aunque poseen un contenido de proteina aprox. 1 por ciento mayor, no fueron superiores en rendimiento en comparación con sus progenitores diploides. La triploidia de la yuca se ha mostrado promisoria hasta cierto punto. La hibridación selectiva de la yuca ha permitido identificar clones con gran tolerancia a la mancha parda. (RA-CIAT) spa

The roots of cassava (Manihot esculenta Crantz) are a rich source of starch. These roots are used as human food, animal feed and as an industrial raw material. In the crop improvement programme, a few promising cassava clones have been identified, which recorded 40-50 percent more yield than the popular cultivars. Six cassava clones have been released by CTCRI for general cultivation based on their high yield and other desirable traits. Among these, five cultivars were identified from the hybrid population and one was identified from the germplasm collection of indigenous origin. Tetraploids, though having about 1 percent higher protein content, were not superior in yield as compared to their diploid parents. Triploidy in cassava has indicated a certain amount of promise. Selective hybridization in cassava resulted in identifying clones having high tolerance to brown leaf spot disease. (AS) eng