Evaluación de cistosoros de polymyxa graminis en el sistema radicular de cuatros genotipos de arroz
Fecha
2018-03
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Facultad de Ciencias Agrarias Universidad de Guayaquil
Resumen
El presente trabajo se realizó en el laboratorio de Fitopatología del INIAP,
Estación Experimental Litoral Sur, durante los meses de octubre 2017 a enero
de 2018. El objetivo fue evaluar en condiciones controladas de infección el
parasitismo de Polymyxa graminis en cuatro genotipos promisorios de arroz.
Los tratamientos estuvieron constituidos por cuatro genotipos de arroz, suelo
contaminado y modificado con y sin arena, suelo estéril; los datos fueron
analizados en un diseño completamente al azar en arreglo factorial AxBxC, con
tres repeticiones y cada repetición estuvo constituida por 10 unidades
experimentales. Se registraron datos de peso de raíz (g), longitud de raíz (cm) y
número de cistosoros en 2 cm de raíz. Los resultados mostraron que hubo
diferencias significativas entre tratamientos, la variedad INIAP 14 fue de mayor
número de cistosoros en dos centímetros de raíz. El Material - 001 tuvo el
mayor peso de raíz y el menor número de cistosoros en dos centímetros de
raíz, y el suelo modificado con arena favorece el desarrollo de cistosoros en la
raíz de las plantas de arroz.
The present work was carried out in the Phytopathology Laboratory of INIAP, Estación Experimental Litoral sur, Since October 2017 until January 2018. The objective was to evaluate the parasitism of Polymyxa graminis in four advanced rice genotypes under controlled infection conditions. The treatments consisted of four rice genotypes, contaminated soil modified with or without sand, sterile soil; the data were analyzed in a completely randomized design in factorial arrangement AxBxC, with three repetitions and each repetition was constituted by 10 experimental units. Data op root weight (g), root length (cm) and number of cystosori on 2 cm root were recorded.The results showed that there were significant differences between treatments, the INIAP 14 variety had a greater number of cystosori in two cm of root. The Material - 001 had the highest root weight and the smallest number of cystosori in two cm of root, and the soil modified with sand favored the development of cystosori in the root of the rice plants.
The present work was carried out in the Phytopathology Laboratory of INIAP, Estación Experimental Litoral sur, Since October 2017 until January 2018. The objective was to evaluate the parasitism of Polymyxa graminis in four advanced rice genotypes under controlled infection conditions. The treatments consisted of four rice genotypes, contaminated soil modified with or without sand, sterile soil; the data were analyzed in a completely randomized design in factorial arrangement AxBxC, with three repetitions and each repetition was constituted by 10 experimental units. Data op root weight (g), root length (cm) and number of cystosori on 2 cm root were recorded.The results showed that there were significant differences between treatments, the INIAP 14 variety had a greater number of cystosori in two cm of root. The Material - 001 had the highest root weight and the smallest number of cystosori in two cm of root, and the soil modified with sand favored the development of cystosori in the root of the rice plants.
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Palabras clave
ENTORCHAMIENTO, POLYMYXA, GRAMINIS, VIRUS, CISTOROS