Rice improvement The main advantages and disadvantages of the methods most used by plant breeders in their attempt to develop varieties that respond to the needs of rice farmers, millers, consumers, and seed producers of the regional and global rice sector are described and illustrated with examp...
Se describen e ilustran con ejemplos las principales ventajas y desventajas de los métodos más usados por los fitomejoradores en su esfuerzo por desarrollar variedades que respondan a las necesidades de los cultivadores, los molineros, los consumidores y los productores de semilla del sector arro...
In 1983, the vegetable dept. of the Instituto Colombiano Agropecuario (Colombia) started selection and crossing activities with 52 and 162 snap bean materials of determinate and indeterminate growth resp., obtained from commercial seed and the CIAT germplasm bank. In 1987, 3 determinate growth ma...
En 1983, la seccion de hortalizas del Instituto Colombiano Agropecuario, Colombia, inicio actividades de seleccion y cruzamiento con 52 materiales de habichuela de crecimiento determinado y 162 de crecimiento indeterminado obtenidos de semilla comercial y del banco de germoplasma del CIAT. En 198...
Girard, E.
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[Objetivos y resultados obtenidos en mejoramiento en habichuela en el Departamento de Antioquia (Colombia)]
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Objetivos y resultados obtenidos en mejoramiento en habichuela en el Departamento de Antioquia (Colombia)
Important aspects related to the genetics and cytogenetics of cassava are reviewed. One of the most appropriate techniques for genetic recombination in cassava is polycrossing; breeding methods most commonly used are clonal selection and directed crossbreeding. Indications are also given of flora...
Se revisan los aspectos mas importantes relacionados con la genetica y la citogenetica de la yuca. Se observa que una de las tecnicas mas apropiadas para la recombinacion genetica en yuca es el policruzamiento; los metodos de mejoramiento mas utilizados han sido la seleccion clonal y el cruzamien...
Cassava is an important crop in the tropics. The Manihot genus had 98 species and no barriers for efficient reproductive isolation have been observed; therefore plant breeders have an immense gene pool to work with. Genes from wild species have already been successfully used to obtain var. resist...
La yuca es un cultivo importante en los tropicos. El genero Manihot tiene 98 especies y no se han observado barreras para el aislamiento eficiente con fines reproductivos; por tanto, los fitomejoradores tienen un inmenso acervo genico con que trabajar. Ya se han utilizado exitosamente genes de es...
Valle, T.L.
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[Utilizacao de especies selvagens no melhoramento de mandioca: Passado, presente e futuro]
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Utilizacao de especies selvagens no melhoramento de mandioca: Passado, presente e futuro
The efficiency of different selection criteria (root wt., aerial part wt., total wt., no. of roots/plant, HI) applied to segregating populations of cassava crosses was assessed in expt. carried out at the Centro Nacional de Pesquisa de Mandioca e Fruticultura in Cruz das Almas (Bahia, Brazil). Sa...
Se evaluo la eficiencia de diferentes criterios de seleccion (peso de la raiz, peso de la parte aerea, peso total, no de raices/planta, IC) aplicados a poblaciones segregantes de cruzamientos de yuca en expt. realizados en el Centro Nacional de Pesquisa de Mandioca e Fruticultura en Cruz das Alma...
Bueno, A.
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[Eficiencia de diferentes criterios de selecao em populacoes segregantes de mandioca]
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Eficiencia de diferentes criterios de selecao em populacoes segregantes de mandioca
The objectives of the collaborative project between CIAT and the Faculty of Agronomy of Gembloux (Belgium) are focused on the improvement of Phaseolus vulgaris through a program of wide crosses with other Phaseolus species. Several species were evaluated and used in crosses, mainly of the group o...
Los objetivos del proyecto colaborativo entre CIAT y la Facultad de Agronomia de Gembloux (Belgica) se enfocan hacia el mejoramiento de Phaseolus vulgaris a traves de un programa de cruces amplios con otras especies de Phaseolus. Se evaluaron varias especies, principalmente del grupo P. coccineus...
International Center for Tropical Agriculture
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[Mejoramiento genético. Mejoramiento de caracteres. Variabilidad de hibridzación interespecífica]
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Mejoramiento genético. Mejoramiento de caracteres. Variabilidad de hibridzación interespecífica
Seed multiplication, agronomic evaluation, and identification of parental genotypes for interspecific hybridization with Phaseolus vulgaris constitute the main research activities carried out in the P. coccineus collection (around 1600 accessions) held by CIAT. In 1985, 3 Ascochyta screening tria...
Schmit, Véronique
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Baudoin, Jean-Pierre
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[Evaluations for Ascochyta resistance in Phaseolus coccineus germplasm collection at C.I.A.T. (Centro International de Agricultura Tropical, Cali, Colombia)]
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Evaluations for Ascochyta resistance in Phaseolus coccineus germplasm collection at C.I.A.T. (Centro International de Agricultura Tropical, Cali, Colombia)
The bean weevil Acanthoscelides obtectus, is an important storage pest of common beans in Latin America and Africa. A few wild bean accessions from Mexico have been identified as highly resistant to the weevil. One accession, G 12952, was crossed to two susceptible bean cultivars differing in see...
Kornegay, Julia L.
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Cardona, C.
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[Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars]
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Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars
The effect of visual screening for grain yield was studied in 9 bean populations resulting from 3 different crossings (single, 3- way, and modified-double crosses) involving different groups of genetic pools from Central America and the Andes. The best yielding lines in the F2 and F3 generations ...
PATINO, H.
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Singh, S.P.
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[Visual selection for seed yield in the F2 and F3 generations of nine common bean crosses]
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Visual selection for seed yield in the F2 and F3 generations of nine common bean crosses
Martínez Racines, César Pompilio
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Pulver, Edward L.
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Núñez Zarantes, VM
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[Uso del cultivo de tejidos en el mejoramiento del arroz]
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Uso del cultivo de tejidos en el mejoramiento del arroz