|Franckowiak, J. - PLNT SCI, NDSU, FARGO, ND|
Submitted to: Barley Genetics Newsletter
Publication Type: Other
Publication Acceptance Date: January 25, 1998
Publication Date: N/A
Technical Abstract: Reaction to BSMV is estimated as the frequency or percentage of plants infected following inoculation of barley seedlings with a specific strain of BSMV. Highly resistant cultivars produce few or no infected plants 7 to 14 days after inoculation. Most or all seedlings of highly susceptible cultivars produce broad mosaic stripes within 7 days after inoculation. Several genes control reaction to BSMV and show additive inheritance patterns. The study of progeny from crosses between resistant and moderately susceptible cultivars indicate that one recessive factor controls the frequency of infected plants. This gene for reaction to BSMV is assigned the gene symbol rsm1.a. Inheritance is as a monofactorial recessive. This gene cosegregates with RFLP marker ABC455 and is located in chromosome 7HS (formerly 1S) over 24.3 cM distal from the nud locus and over 28.2 cM from the 1ks2 locus.