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Breeding programs for acid-soil tolerance are desirable as a relatively inexpensive and permanent way for increasing maize (Zea mays L.) yield on these soils. Our objective was to compare the genetic effects controlling the expression of maize traits in acid and non-acid soils. Seven related and ...


Pérez Velásquez, Juan CarlosSouza Junior, C.L. deNarro Leon, LAPandey, S.León, C. de[Genetics effects for maize traits in acid and non-acid soils]Genetics effects for maize traits in acid and non-acid soils

Little is known about the inheritance of agronomic traits in cassava (Manihot esculenta Crantz). The vegetative multiplication of cassava allows cloning of individual genotypes, and separates environmental from genetic variation in the within-family variation. Knowing the magnitude of between- an...


Pérez Velásquez, Juan CarlosCeballos, H.Jaramillo, GustavoMorante, NCalle, FArias, B.Bellotti, Anthony C.[Epistasis in cassava adapted to midaltitude valley environments]Epistasis in cassava adapted to midaltitude valley environments

Little is known about the inheritance of agronomic traits in cassava, or on the relative importance of epistasis for most crops. A group of 10 clones, adapted to the acid-soils environment was used as parents in a diallel study. Thirty genotypes were obtained from each F1 cross and cloned. Each c...


Pérez Velásquez, Juan CarlosCeballos, H.Calle, FMorante, NGaitan, WLlano Rodríguez, Germán AlbertoÁlvarez, E.[Within-family genetic variation and epistasis in cassava (Manihot esculenta Crantz) adapted to the acid-soils environment]Within-family genetic variation and epistasis in cassava (Manihot esculenta Crantz) adapted to the acid-soils environment

One of the objectives of the cassava-breeding project at CIAT is the identification of clones with special root quality characteristics. A large number of self-pollinations have been made in search of useful recessive traits. During 2006 harvests an S1 plant produced roots that stained brownish-r...


Ceballos, H.Sánchez, T.Morante, NFregene, Martin A.Dufour, D.L.Smith, A.M.Denyer, KPérez Velásquez, Juan CarlosCalle, FMestres, C[Discovery of an amylose-free starch mutant in cassava (Manihot esculenta Crantz)]Discovery of an amylose-free starch mutant in cassava (Manihot esculenta Crantz)

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