Title: Evaluation of disease reaction and agronomic traits of selected peanut entries Authors
Submitted to: Peanut Research at Oklahoma State University
Publication Type: Experiment Station
Publication Acceptance Date: May 10, 2010
Publication Date: February 1, 2011
Citation: Melouk, H.A., Chamberlin, K.D. 2011. Evaluation of disease reaction and agronomic traits of selected peanut entries. In: Partners and Progress - Peanut Research at OSU, 2010. Oklahoma Agricultural Experiment Station, P-1031. p. 33-37. Technical Abstract: Our peanut improvement efforts are focused on enhancing yield, quality and disease resistance. Therefore, the major emphasis of this research project is to develop high oleic peanut cultivars possessing disease resistance, and high yield and grade. All the plot research reported here was performed at the Caddo Research Station. Weed management protocol was implemented, and a leaf spot fungicide advisory program was used to manage foliar diseases. All plots were irrigated as needed to ensure optimum moisture with a pivot system. All plots were planted May 11. Final disease evaluations were performed Sept. 21, and on Oct. 5 for the runner and Spanish X runner lines. Spanish plots were harvested Oct. 4, while the runners and the Spanish X Runner were harvested on Oct. 15. Also, yield and grade of all entries in the tests were determined under the prevailing environmental conditions in Oklahoma in 2010. Results from these trials indicate that grades of the Spanish peanut entries ranged from 61 to 66%. The advanced breeding line ARSOK-S1 graded at 63%, whereas the cultivar Tamnut OL06 graded at 61%, with an LSD of 3 at P=0.05. Overall, grades of the runner-type peanut entries ranged from 56.4 to 72.3. The high oleic runner breeding line 143-3 had the lowest incidence of Southern blight at 1%. Finally, four of the high oleic Spanish X runner breeding lines (008-1, 068-3, 140-1, and 140-3) had the lowest incidence of southern blight. This was year 2 of advanced breeding trials on these lines. The results will be combined with those from years 1 and 3 to determine which lines to carry over for further analysis.