| Revista: | Acta agronómica |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000332689 |
| ISSN: | 0120-2812 |
| Autores: | Rosero Alpala, Elvia Amparo1 Cuambe, Constantino1 Egesi, Chiedozie2 Sánchez, Teresa2 Morante, Nelson2 Ceballos, Hernán2 Fregene, Martín2 Morales Osorio, Juan Gonzalo3 |
| Instituciones: | 1Universidad Nacional de Colombia, Facultad de Ciencias Agropecuarias, Palmira, Valle del Cauca. Colombia 2Centro Internacional de Agricultura Tropical, Cali, Valle del Cauca. Colombia 3Universidad Nacional de Colombia, Departamento de Ciencias Agronómicas, Medellín, Antioquia. Colombia |
| Año: | 2010 |
| Volumen: | 59 |
| Número: | 2 |
| Paginación: | 180-187 |
| País: | Colombia |
| Idioma: | Español |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en español | Se evaluó una población de medios hermanos (B1PD280) proveniente del cruzamiento del parental resistente al deterioro fisiológico poscosecha (DFP) CW429-1 (Manihot esculenta x M. walkerae), y ocho genotipos élite utilizados como padres recurrentes susceptibles. Se evaluaron cinco raíces por genotipo, 7 y 14 días después de la cosecha (d.d.c.) mediante una escala (0 - 100%). Los resultados mostraron reducción significativa de DFP (entre 10% y 46% en relación con los parentales recurrentes). Cincuenta y un genotipos tuvieron alto y medio nivel de resistencia (0 - 35%), 22% y 20% de ellos correspondieron a individuos sin síntomas 7 o 14 d.d.c., respectivamente. Se estableció una posible correlación entre DFP (14 d.d.c.) y escopoletina (0.523, P < 0.001) y materia seca (0.288, P < 0.001) |
| Resumen en inglés | The accelerated Physiological Postharvest Deterioration (PPD) process limits the potential of cassava crop, diminishing its palatability and commercial value within 24-72 hours after harvest. A source of genes for drastic delay of PPD was identified in an inter-specific hybrid (CW429-1) between Manihot esculenta (cultivated cassava) and Manihot walkerae. The aim in this study was to evaluate the introgression of the resistance to PPD from the donor parent CW429-1 in cassava. A half-sib (BIPD280) population from resistant parental CW429-1 and 8 elite CIAT genotypes, used as susceptible recurrent parents, was developed and evaluated. The method proposed by Wheatley et al. (1985), with some modifications was used to quantify PPD. Five roots per genotype were evaluated 7 and 14 days after harvest (DAH), following a scale (0 - 100%), other relevant traits were evaluated. Results showed significant reduction of PPD (between 10–46% of PPD in relation to the recurrent parents). About 51% of genotypes were found to have high to medium level of resistance (0-35% PPD) of which 22 and 20% genotypes correspond to individuals without PPD after 7 and 14 DAH, respectively. A positive correlation was found between PPD (14 DAH) and scopoletin (0.523, p<0.001), and with dry matter (0.288, p<0.001). These preliminary results indicated that the scheme for introgressing PPD resistance was successful, that confirm the potential of the wild cassava in the scheme of cassava breeding |
| Disciplinas: | Agrociencias |
| Palabras clave: | Fitotecnia, Frutales, Yuca, Fisiología postcosecha, Deterioro fisiológico, Escopoletina, Manihot esculenta |
| Keyword: | Agricultural sciences, Crop husbandry, Fruit trees, Cassava, Postharvest physiology, Scopoletin, Manihot esculenta |
| Texto completo: | Texto completo (Ver PDF) |
