Breeding Wheat for Resistance to Insects

DIMBOA levels in hexaploid Brazilian wheat are not associated with antibiosis against the cereal aphids Rhopalosiphum padi and Sitobion avenae

“…Besides that, the resistance of BRS Timbau´va and BRS Guabiju to R. padi detected by others can be correlated to the antibiosis data showed here. Antibiosis happens when insects feed from a particular plant but an adverse effect occurs on their biology reducing their growth or survival (Berzonsky et al 2003). In this work, BRS Timbau´va was among the genotypes showing lower intrinsic rate of population increase (average of 30.57%) while BRS Guabiju presented the highest rate (average of 33.97%) (Fig.…”

Aphid acceptance of Hordeum genotypes is affected by plant volatile exposure and is correlated with aphid growth

“…Both these aphids cause easily detectable plant damage, and selections can be based on reduced symptoms (e.g. Berzonsky et al 2003). In other aphid species that cause more subtle damage to cereals, such as the bird cherry -oat aphid (Rhopalosiphum padi L.), selections for resistance traits must be made by more laborious methods such as determination of aphid growth rate.…”

Mapping resistance to the bird cherry-oat aphid and the greenbug in wheat using sequence-based genotyping

“…Efforts to deploy resistance to S. graminum in wheat were made since the 1950's (Porter et al 1997;Berzonsky et al 2003) and this has led to the identification of several resistance genes. Currently there are 14 major genes for resistance to S. graminum in wheat that have been identified (McIntosh et al 2010;Crespo-Herrera 2012).…”