Mapping genes for resistance to barley stripe rust (Puccinia striiformis f. sp. hordei)

F. Q. Chen, D. Prehn, Patrick M. Hayes, D. Mulrooney, Ann Corey, Hugo Vivar. (1/5/1994). Mapping genes for resistance to barley stripe rust (Puccinia striiformis f. sp. hordei). TAG Theoretical and Applied Genetics, 88, pp. 215-219.

Abstract

Two genes conferring resistance to the barley stripe rust found in Mexico and South America, previously identified as race 24, were mapped to the M arms of barley chromosomes 7 and 4 in a doubled haploid population using molecular markers and the quantitative trait loci (QTL) mapping approach. The resistance gene on chromosome 7 had a major effect, accounting for 57% of the variation in disease severity. The resistance gene on chromosome 4 had a minor effect, accounting for 10% of the variation in trait expression. Two pairs of restriction fragment length polymorphism markers are being used to introgress the resistance genes to North American spring barley using molecular marker-assisted backcrossing.