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

✍ Scribed by F. Q. Chen; D. Prehn; P. M. Hayes; D. Mulrooney; A. Corey; H. Vivar

• Publisher: Springer
• Year: 1994
• Tongue: English
• Weight: 562 KB
• Volume: 88
• Category: Article
• ISSN: 0040-5752
• DOI: 10.1007/bf00225900

✦ Synopsis

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.