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• W2209567917 abstract "ABSTRACT: Components of resistance were evaluated in seven Musa genotypes artificially inoculated with mycelia fragment suspensions of Mycosphaerella fijiensis Morelet (strain CCIBP-Pf80). Incubation period, number and area of necrotic lesions, infection index, area under the disease progress curve, asexual latent period, and number of spermogonia were evaluated in the genotype leaves to dissect the infective cycle of the fungus under greenhouse conditions. Incubation period in the inoculated leaves began at 14-21 days post infection, and significant differences were detected in the response of the different genotypes. Necrotic lesions were only observed in Grande naine, Pisang Awak, and significantly less in Pisang lilin. Grande naine reached the highest percentage of leaflet area with necrotic tissue, followed by Pisang Awak and Pisang lilin. Grande naine and Pisang Awak reached the greatest areas under the disease progress curves, while the lowest values were calculated in FHIA-18 and FHIA-25. The asexual latent period in Grande naine and Pisang Awak was significantly shorter (approximately 14 days) than in Pisang lilin. Greater numbers of spermogonia were observed in Grande naine and Pisang Awak, followed by Pisang lilin. Conidia were only detected in Grande naine, Pisang Awak and, in a significantly less number, in Pisang lilin. The different response observed of Musa spp. genotypes to the causal agent of Black Sigatoka indicated that the components of resistance used allowed the quantitative assessment of their reaction to this fungus. These results could improve or facilitate the efficiency and precision of the early evaluation process in banana and plantain breeding programs. Key words: early screening, inoculation, Mycosphaerella fijiensis, phytopathology, quantitative resistance. Componentes de la resistencia para cuantificar la respuesta a la Sigatoka Negra en genotipos de Musa inoculados artificialmente RESUMEN: Se evaluaron los componentes de la resistencia en genotipos de Musa inoculados artificialmente utilizando suspensiones miceliales de Mycosphaerella fijiensis Morelet (cepa CCIBP-Pf80). El periodo de incubacion, numero de lesiones necroticas, area de lesiones necroticas, indice de infeccion, area bajo la curva del progreso de la enfermedad, periodo de latencia asexual y numero de Espermogonios se evaluaron en siete genotipos para analizar el ciclo infectivo de M. fijiensis en condiciones de invernadero. El periodo de incubacion en todos los genotipos se enmarco entre 14-21 dias posteriores a la inoculacion y se observaron diferencias significativas en la respuesta de los diferentes genotipos de Musa . El mayor numero de lesiones necroticas se observo en el genotipo Grande naine en comparacion con el Pisang Awak, y este a su vez, respecto al Pisang lilin. Los mayores valores del area bajo la curva del progreso de la enfermedad se observaron en los genotipos Grande naine y Pisang Awak, mientras los menores se calcularon en FHIA-18 y FHIA-25. Grande naine y Pisang Awak tuvieron una reduccion significativa del periodo de latencia asexual (aproximadamente 14 dias) respecto al Pisang lilin. El mayor numero de espermogonio se observo en Grande naine y Pisang Awak, seguido del Pisang lilin. Los conidios solo se detectaron en hojas necrosadas de Grande naine y Pisang Awak, las cuales fueron significativamente superiores al Pisang lilin. Las diferencias observadas en la respuesta de los genotipos de Musa spp. frente al agente causal de la Sigatoka Negra, indicaron que los componentes de la resistencia utilizados permitieron evaluar cuantitativamente la reaccion de Musa spp. frente al agente causal de BLSD. Estos resultados podrian facilitar una mayor eficiencia y precision de la evaluacion temprana de genotipos de bananos y platanos en programas de mejoramiento genetico. Palabras clave: fitopatologia, inoculacion, Mycosphaerella fijiensis, resistencia cuantitativa, seleccion temprana" @default.
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• W2209567917 date "2015-03-02" @default.
• W2209567917 modified "2023-09-26" @default.
• W2209567917 title "Components of resistance to assess Black Sigatoka response in artificially inoculated Musa genotypes" @default.
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