Effect of resistant and susceptible soybean cultivars on the development of male and female Heterodera glycines Ichinohe
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Data
2015-10
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Resumo
Soybean cyst nematode, Heterodera glycines Ichinohe, is one of the major phytopathological problems
affecting soybeans, Glycine max (L.) Merr., in the major producing countries and the use of resistant
cultivars and crop rotation have been the main methods of control adopted to reduce the nematode
population in infested soils. Purpose of this study was to evaluate the effect of resistant (BRSGO
Ipameri and BRSGO Chapadões) and susceptible (BRSGO Araçu, BRSGO Jataí, BRSGO Luziânia, BRS
Favorita RR, BRS Valiosa RR, BRS Silvânia RR) soybean cultivars on the development of H. glycines
males and females during two successive years (2007 and 2008). In the trial of 2008 the plants were
divided in three plots, with the last one having the roots stained to count the juveniles and to evaluate
survival rate. Resistant cultivars always maintained a small number of females and males, except for
cultivar BRSGO Ipameri that had a high count of males. Only cultivars BRS Favorita RR and BRS
Silvânia RR had a sex ratio of 1:1. All other susceptible cultivars had, in general, greater number of
males than females. Survival rate was nil on both resistant cultivars, and varied from 6.75 to 35.00% on
the susceptible cultivars.
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Palavras-chave
Glycine max, Sex ratio, Hydroponics, Cyst nematode
Citação
ARAÚJO, Fernando Godinho de; ROCHA, Mara Rúbia; SANTOS, Leonardo de Castro; TEIXEIRA, Renato Andrade; FERREIRA, Cristiane Silva. Effect of resistant and susceptible soybean cultivars on the development of male and female Heterodoxa glycines. African Journal of Agricultural Research, Lagos, v. 10, n. 43, p. 4082-4086, Oct. 2015.