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Melhoramentogenético visando resistencia ao nematóide de cisto da soja Anais

Por: Kiil, R.A. de S | Almeida, L.A. de | Empresa Brasileira de Investigación Agropecuaria (EMBRAPA) Brasilia, Brasil | IICA, Brasilia, DF (Brasil) | 1. Seminario Nacional sobre o Nematoide de Cisto da Soja Heterodera glycines Brasilia, DF (Brasil) 20-21 Oct 1993.
Tipo de material: ArtículoArtículoEditor: Brasilia, DF (Brasil) 1993Descripción: p. 93-99.Tema(s): HETERODERA GLYCINES | FITOMEJORAMIENTO | GLYCINE MAX | HETERODERA GLYCINES AGRICULTURA | PLANT BREEDING AGRICULTURA | GLYCINE MAX AGRICULTURA | HETERODERA GLYCINES AGRICULTURA | AMELIORATION DES PLANTES AGRICULTURA | GLYCINE MAX AGRICULTURA | NEMATODO DEL QUISTE DE LA SOJAResumen: Farmers must use crop rotation and/or use resistant or tolerant cultivars to reduce losses in infested areas. Using of resistant cultivars is one of the most efficient and economical methods of SCN control. Field tests conducted in North Carolina, involving over 4.000 soybean genotypes, showed resistance in PI 84751, PI 90763, IIsoy and Peking. Referring to genetic resistance, initial studies showed the existence of three independent recessive genes. The Hartwig cultivar was recently marketed in the US as resistant to all soybean nematode strains. In Brazil, except, IPAGRO-21,al cultivars tested were susceptible. Three strategies are suggested for Brazil's SCN resistance improvement programs: a) Using retro-crossbreeding or modified retro-crossbreeding: b) Simple resistant cultivar; c) Introduction by classic retro-crossbreeding in the best North American cultivars of long juvenile period characteristics, resistance to mancha olho-de-ra and resistance to stem canker. (MV)

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Farmers must use crop rotation and/or use resistant or tolerant cultivars to reduce losses in infested areas. Using of resistant cultivars is one of the most efficient and economical methods of SCN control. Field tests conducted in North Carolina, involving over 4.000 soybean genotypes, showed resistance in PI 84751, PI 90763, IIsoy and Peking. Referring to genetic resistance, initial studies showed the existence of three independent recessive genes. The Hartwig cultivar was recently marketed in the US as resistant to all soybean nematode strains. In Brazil, except, IPAGRO-21,al cultivars tested were susceptible. Three strategies are suggested for Brazil's SCN resistance improvement programs: a) Using retro-crossbreeding or modified retro-crossbreeding: b) Simple resistant cultivar; c) Introduction by classic retro-crossbreeding in the best North American cultivars of long juvenile period characteristics, resistance to mancha olho-de-ra and resistance to stem canker. (MV)

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