(1998) identificaron en líneas endogámicas recombinantes derivadas de la cruza x Dorado (susceptible), un número variable de loci de caracteres cuantitativos (LCCs) asociados con la resistencia a la pudrición carbonosa en campo, los cuales a su vez explicaron del 12 al 19% de la variación fenotípica observada para la reacción a M. phaseolina es de naturaleza poligénica, mientras que Miklas et al. Miklas y Beaver (1994) deteminaron que la resistencia de campo a M. phaseolina en la línea BAT 477 es gobernada por un par de genes dominantes con efectos complementarios, en condiciones de evaluación de invernadero y de invernadero y campo, respectivamente. (2001a) indicaron que la resistencia a M.
phaseolina (Mayek-Pérez et al., 1996, 2001bPastor-Corrales y Abawi, 1988) se han identificado genotipos resistentes de frijol a la pudrición carbonosa sin embargo, se desconoce la base genética de la resistencia al hongo en variedades y líneas experimentales promisorias como fuentes de resistencia genética a la enfermedad. En estudios previos de la reacción de germoplasma de Phaseolus a M. phaseolina, and that resistance is controlled by two complementary dominant genes (double recessive epistasis), akin to the exhibited by TLP 19, the other resistant genotype. It was confirmed that BAT 477 is resistant to M. This was suggested by data in F 2 populations that showed normal-like distributions in some cases, and in F 3 it was adjusted to normal distributions on their frequency of reaction to charcoal rot suggesting resistance segregations determined by two epistatic genes with variable effects, depending on the genotype used as parent. phaseolina in common bean is controlled by two pairs of epistatic genes with complementary effects, and that resistance to charcoal rot could be quantitatively controlled by major effects of two genes. phaseolina was evaluated under greenhouse conditions. Reaction of F 3 lines to a highly virulent isolate of M. Parents, F 1 and F 2 generations and F 1 -parent backcrosses were included in the studies. Experiments were conducted under field conditions at Cotaxtla, Veracruz and in greenhouse at Montecillo, Estado de México. on resistant (BAT 477 and TLP 19) and susceptible (Pinto UI-114 and Rio Tibagi) common bean cultivars were carried out. Studies to determine genetic resistance inheritance to M.
0 kommentar(er)
