QTLs for resistance to soybean cyst nematode, races 3, 9, and 14 in cultivar Hartwig.

• Autor(a) principal: FERREIRA, M. F. da
• Data de Publicação: 2011
• Outros Autores: CERVIGNI, G. D. L, FERREIRA, A., SCHUSTER, I., SANTANA, F. A., PEREIRA, W. D., BARROS, E. G. de, MOREIRA, M. A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/910178
• topic: Seleção assistida por marcador; Marcador molecular; Melhoramento; Glycine Max; Breeding; Genetic markers; marker-assisted selection

The objective of this work was to identify major and minor-effect quantitative trait loci (QTL) for resistance to races 3, 9, and 14 of soybean cyst nematode (SCN) in Hartwig cultivar; to map new resistance QTLs for these races; and to check for the existence of epistatic interactions between QTLs. Cultivar Hartwig is an important resistance source to SCN. Recombinant inbred lines (RIL) obtained from a cross between 'Hartwig' (resistant) and Y23 (susceptible) were evaluated regarding resistance to the three races. New genomic regions for resistance to SCN were identified by microsatellites. Four QTLs, which explained between 12 and 34% of phenotypic variance, were detected for resistance to race 3 in linkage groups (LG) A2, G, J, and M. The QTL in LG G is also important for resistance to race 9. Epistatic interactions were detected between loci, which indicate resistance to races 9 and 14. There are high and low-effect resistance QTLs to SCN.