PLACEMENT OF LOCI FOR AVENINS AND RESISTANCE TO PUCCINIA-CORONATA TO A COMMON LINKAGE GROUP IN AVENA-STRIGOSA

Alcohol-soluble seed storage proteins of oat (avenins) were extracted from two diploid accessions representing the A genome and separated by high-resolution acid polyacrylamide gel electrophoresis. Polymorphism s were detected for three clearly resolved protein bands. Linkage anal ysis of 88 F-2.3 families mapped the three bands to a single locus. In tegration of avenin segregation data with an RFLP linkage map construc ted from the same population, mapped the avenin locus to a linkage gro up containing a locus conferring resistance to nine isolates of Puccin ia coronata. Linkage between genes encoding alcohol-soluble seed prote ins and genes for resistance to Puccinia species was also observed for the homoeologous group 1 chromosomes of barley (1H), rye (1R), wheat (1A, 1B, 1D), and chromosomes 4 and 10 of maize.