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Selecao de cultivares e clones de mandioca resistentes a antracnose (Colletotrichum gloeosporioides)

By: Contributor(s): Material type: ArticleArticleLanguage: Portuguese Description: v. 1, p. 503-512Subject(s): LOC classification:
  • 11709
 In: In: Congresso Brasileiro de Mandioca (1, 1979, Cruz das Almas, Brasil). AnaisSummary: Se estudiaron 100 cv. de yuca, 36 clones de polinizacion abierta y 56 clones de polinizacion controlada para determinar fuentes de resistencia a la antracnosis (Colletotrichum gloeosporioides) en condiciones de campo en Cruz das Almas, BA, Brasil. Se uso un diseno de bloques al azar en parcelas con 45 plantas/tratamiento. La siembra se efectuo en nov. de 1978 y se usaron estacas de 20 cm colocadas horizontalmente a 10 cm de profundidad y a una distancia de 1 x 1 m. Las evaluaciones en feb. y junio (4 y 8 meses despues de la emergencia, resp.) indicaron resistencia a la enfermedad en 7 cv., 3 clones de polinizacion abierta y 19 de polinizacion controlada. Igualmente se encontraron materiales moderadamente resistentes, moderadamente susceptibles y susceptibles. Las condiciones que favorecieron el desarrollo de la enfermedad y la infeccion de la planta fueron de alta pluviosidad, HR mayor que 80 por ciento y temp. entre 20-25 grados centigrados. Se recomienda usar materiales resistentes y moderadamente resistentes en regiones con condiciones similares. (RA-CIAT)Summary: A total of 100 cassava cv., 36 open-pollinated clones, and 56 control pollinated clones were studied to determine sources of resistance to anthracnose (Colletotrichum gloeosporioides) under field conditions in Cruz das Almas, BA, Brazil. A randomized block design was used with each plot containing 45 plants/treatment. Planting took place in Nov. 1978 using 20-cm cuttings planted horizontally at 1 x 1 m, 10 cm in depth. Evaluations in Feb. and June (4 and 8 mo. after emergence, resp.) indicated that 7 cv., 3 open-pollinated clones, and 19 clones of controlled pollination were resistant. Moderately resistant, moderately susceptible, and susceptible materials were also found. High rainfall, RH greater than 80 percent, and temp. between 20-25 degrees Celsius were found to be ideal conditions for the development of anthracnose and consequently, plant infection. The use of resistant and moderately resistant materials in areas with similar conditions is recommended. (AS)
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Item type Current library Collection Call number Copy number Status Date due Barcode Item holds
Book Chapters Book Chapters CIAT Library Document collection CINFOS Document Collection CINFOS 11709 (Browse shelf(Opens below)) c.1 Short Loan 100057518
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Se estudiaron 100 cv. de yuca, 36 clones de polinizacion abierta y 56 clones de polinizacion controlada para determinar fuentes de resistencia a la antracnosis (Colletotrichum gloeosporioides) en condiciones de campo en Cruz das Almas, BA, Brasil. Se uso un diseno de bloques al azar en parcelas con 45 plantas/tratamiento. La siembra se efectuo en nov. de 1978 y se usaron estacas de 20 cm colocadas horizontalmente a 10 cm de profundidad y a una distancia de 1 x 1 m. Las evaluaciones en feb. y junio (4 y 8 meses despues de la emergencia, resp.) indicaron resistencia a la enfermedad en 7 cv., 3 clones de polinizacion abierta y 19 de polinizacion controlada. Igualmente se encontraron materiales moderadamente resistentes, moderadamente susceptibles y susceptibles. Las condiciones que favorecieron el desarrollo de la enfermedad y la infeccion de la planta fueron de alta pluviosidad, HR mayor que 80 por ciento y temp. entre 20-25 grados centigrados. Se recomienda usar materiales resistentes y moderadamente resistentes en regiones con condiciones similares. (RA-CIAT) spa

A total of 100 cassava cv., 36 open-pollinated clones, and 56 control pollinated clones were studied to determine sources of resistance to anthracnose (Colletotrichum gloeosporioides) under field conditions in Cruz das Almas, BA, Brazil. A randomized block design was used with each plot containing 45 plants/treatment. Planting took place in Nov. 1978 using 20-cm cuttings planted horizontally at 1 x 1 m, 10 cm in depth. Evaluations in Feb. and June (4 and 8 mo. after emergence, resp.) indicated that 7 cv., 3 open-pollinated clones, and 19 clones of controlled pollination were resistant. Moderately resistant, moderately susceptible, and susceptible materials were also found. High rainfall, RH greater than 80 percent, and temp. between 20-25 degrees Celsius were found to be ideal conditions for the development of anthracnose and consequently, plant infection. The use of resistant and moderately resistant materials in areas with similar conditions is recommended. (AS) eng

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