Rea o de genótipos de nectarina (Prunus persica var. nucipersica) à ferrugem da folha, ao chumbinho e evolu o da desfolha Reaction of genotypes of the nectarine (Prunus persica var. Nucipersica) to leaf rust and shot hole, and the development of defoliation

A resistência genética às doen as é um progresso na produ o de todas as culturas e fontes de resistência devem ser reportadas, auxiliando os programas de melhoramento. O presente trabalho objetivou avaliar a resistência de genótipos de nectarina à ferrugem da folha e ao chumbinho, assim como, correlacionar a intensidade das doen as com a desfolha prematura. Foram avaliados três genótipos de nectarina em delineamento de blocos ao acaso com dez repetic es. Com base nos resultados obtidos, o genótipo Bruna mostrou-se resistente ao chumbinho e suscetível à ferrugem, ao passo que o genótipo Sunripe foi resistente à ferrugem; FLA 9-15N foi moderadamente suscetível à ferrugem. Houve correla o apenas entre severidade da ferrugem e desfolha. Genetic resistance to disease can be seen as progress in the production of all crops, and sources of resistance have to be reported, thus helping improvement programs. This study aimed to evaluate the resistance of nectarine genotypes to leaf rust and shot hole, as well as to correlate the severity of the diseases with premature defoliation. Three genotypes of the nectarine were evaluated in a randomized block design with ten replications. Based on the results, the genotype Bruna proved resistant to shot hole and susceptible to leaf rust, while the genotype Sunripe was resistant to leaf rust. FLA 9-15N was moderately susceptible to leaf rust. There was correlation between leaf-rust severity and defoliation only.