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
In Panama most of the cassava is produced by small farmers on marginal, infertile soils with a low level of technology. One of the main cassava producing areas is Ocu, where Ultisols prevail. The most commonly grown var. is Brasilena, with av. yields of 10-12 t/ha. Production constraints include ...
En Panama la mayor parte de la yuca es producida por pequenos agricultores en suelos marginales e infertiles y con un nivel tecnologico bajo. Una de las areas de mayor produccion es Ocu, con suelos Ultisoles en su mayoria. La var. Brasilena es la mas cultivada a nivel nacional con un rendimiento ...
The importance of estimating genetic parameters in cassava in order to produce superior performing cv. is highlighted. Different concepts related to phenotypic variance are discussed; variance is divided into genetic (additive, dominance, epistasis) and environmental. Of the former, additive vari...
Se destaca la importancia de la estimacion de los parametros geneticos en la yuca para producir cv. superiores. Se discuten diferentes conceptos relacionados con la varianza fenotipica, la cual se divide en genetica (genetica aditiva, dominancia, epistasis) y ambiental; de las anteriores, la vari...
Rao, Idupulapati M.
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Beebe, Stephen E.
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Polanía Perdomo, José A.
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Grajales, Miguel A.
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Cajiao V., César Hernando
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Ricaurte Oyola, José Jaumer
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[Evidence for genotypic differences among elite lines of common bean in the ability to remobilize photosynthate to increase yield under drought]
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Evidence for genotypic differences among elite lines of common bean in the ability to remobilize photosynthate to increase yield under drought
Roca, William M.
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[Los métodos de cultivo de tejidos y su aplicación en el fitomejoramiento]
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Los métodos de cultivo de tejidos y su aplicación en el fitomejoramiento
A breeding program to select low-mimosine lines of leucaena has been in progress since 1970. Selections were evaluated in two field trials at Lansdown. Although the low-mimosine selections did indeed have lower mimosine than the control cultivars, their dry matter yield was also inferior (about t...
Bray, RA
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Hutton, EM
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Beattie, WM
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[Breeding Leucaena for low-mimosine: Field evaluation of selections]
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Breeding Leucaena for low-mimosine: Field evaluation of selections