Skip to main content
ARS Home » Midwest Area » West Lafayette, Indiana » Crop Production and Pest Control Research » Research » Publications at this Location » Publication #143486
Title: YELLOW DWARF VIRUS RESISTANCE IN OATS IN THE USDA-ARS/PURDUE UNIVERSITY SMALL GRAINS PROGRAM: PRESENT STATUS AND FUTURE DIRECTION

Author
item ANDERSON, JOSEPH
item AYALA-NAVARRETE, LIGIA - PURDUE UNIVERSITY
item BALAJI, BOOVARAGHAN - PURDUE UNIVERSITY
item OHM, HERBERT - PURDUE UNIVERSITY

Submitted to: American Oat Workers Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 4/5/2002
Publication Date: 5/5/2002
Citation: Anderson, J.M., Ayala-Navarrete, L., Balaji, B., Ohm, H.W. 2002. Yellow dwarf virus resistance in oats in the usda-ars/purdue university small grains program: present status and future direction. American Oat Workers Conference Proceedings.

Interpretive Summary:

Technical Abstract: The USDA-ARS/Purdue University Small Grains Program is developing and characterizing yellow dwarf virus resistance in oats through breeding and characterizing oat-virus interactions. The breeding program has developed a recombinant inbred population that is currently in replicated field hill plots and will be evaluated for crown rust and yellow dwarf virus resistance. Progress continues to be made in YDV resistance by combining new sources of resistance. Currently, several lines that appear to be quite resistant to YDV are in replicated yield trials for the fist time in 2002. When scored in previous tests using the standard 0 to 9 scale scoring with 0 being no chlorosis or stunting to 9 being severe stunting and chlorosis these lines scored 2.5 compared to Classic at 3.0 and Clintland 64 at 9.0. To supplement the breeding program, research is beginning to identify the most feasible methods for utilizing highly effective YDV resistance loci derived from resistant/immune wheatgrass genotypes. The viability and germination of wheat pollen in oat flowers is being examined. If successful, this wide cross, combined with embryo rescue, will provide the means for introgressing YDV resistant wheat-wheatgrass translocations. Two additional approaches are: A) develop a bioengineering strategy that does not rely on a virus coat protein or other virus-derived genes as resistance genes and B) examine the response of susceptible and resistant oat to the virus at the gene level. Initial response studies are focused on examining the progression of virus replication over time and the expression pattern of known defense response genes in the susceptible line, Clintland 64. Preliminary analysis suggests indicates that YDV viruses replicate at different rates and that some defense response genes are down regulated following inoculation.