significant role in the rejection of the pathogen,i'2) Avenalumins consist of 3 components; the chemical structure ef the major component, avenalumin t, has been established to be 2-[2-(4hydroxyphenyl)ethenyl]-6-4H-3,1-benzoxazin-4-onc (1), based on an MS analysis of its acetylated derivative and identification of the methanolysis products.3) However, chem{cal studies by Crombie and Mistry4) ha...

ABSTRACT In our previous report, quantitative trait loci (QTL) for field adult plant resistance to crown rust were identified in an oat population of 152 F(5:6) recombinant inbred lines from the cross of 'Ogle' (susceptible)/MAM17-5 (resistant). The objectives of the present study were to identify in the same population, the number, genomic location, and effect of QTL and digenic QTL epistasis ...

Oat crown rust, caused by Puccinia coronata f. sp. avenae, is considered to be the most serious disease of oat (Avena sativa L.) in North America (27). It is distributed worldwide but is most damaging where heavy nightly dews occur in conjunction with moderate to high temperatures during the growing season. Under ideal conditions, crown rust can result in complete crop failure. In the United St...