Melhoramentogenético visando resistencia ao nematóide de cisto da soja
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)
| Main Authors: | , , , , |
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| Format: | Texto biblioteca |
| Language: | por |
| Published: |
Brasilia, DF (Brasil)
1993
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| Subjects: | HETERODERA GLYCINES, FITOMEJORAMIENTO, GLYCINE MAX, AGRICULTURA, |
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