Submitted to: Crop Science
Publication Type: Germplasm Release
Publication Acceptance Date: 4/18/2006
Publication Date: 8/1/2006
Citation: Kolb, F.L., Brown, C.M., Smith, N.J., Domier, L.L. 2006. Registration of seven barley yellow dwarf virus tolerant oat germplasm lines. Crop Science. 46(4):1830-1831.
Technical Abstract: Seven spring oat (Avena sativa L.) germplasm lines (Reg. no. GP-87 to GP-93, PI 641965 to PI 641971) with very high levels of Barley yellow dwarf virus (BYDV) tolerance were developed and released by the Illinois Agricultural Experiment Station of the University of Illinois and the USDA-ARS. BYDVs cause economic losses in small grain crops worldwide. Host plant resistance or tolerance is the most important strategy to mitigate losses caused by BYDVs. The BYDV-tolerant oat germplasm lines were developed from a four-way cross that involved four BYDV-tolerant parents: IL86–1156, IL86–5698, IL86–6404, and ‘Ogle’. An F1 plant of IL86–5698/IL86–1156 was crossed with an F1 plant of Ogle/IL86–6404 and selfed. The F3 populations were space-planted in the field and inoculated with BYDV-PAV-IL using viruliferous Rhopalosiphum padi. The most tolerant (i.e., symptomless) plants (780 total) were harvested and evaluated the following season in single hills. From these, 139 symptomless lines were selected. Sixty-two lines were selected from the 139 lines based on ELISA values and percent stunting and yield loss and evaluated for agronomic performance in a replicated experiment. Based on grain yield, test weight, kernel morphology, and absence of awns, 42 BYDV-tolerant lines were selected and evaluated further in replicated trials. From these, seven lines were selected for release as BYDV-tolerant germplasm lines. The lines exhibited only minor chlorosis or other symptoms due to BYDV, but differ somewhat in height, maturity, ELISA virus titer, and resistance to crown rust (Puccinia coronata Cda. f. sp. avenae). Seeds are available from the corresponding author and have been deposited in the USDA-ARS National Plant Germplasm System.