pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-9-1-7 Articles Genotype X Environment Interaction Among Peanut Lines in Oklahoma1 K. E. Dashiell , J. S. Kirby , and R. W. McNew 2 Research assistant, (Present address: Dep. of Agronomy, Univ. of Florida, Gainesville, FL 32601) associate professor of agronomy and professor of statistics, Oklahoma State University, Stillwater, Okla. 74078

1Contribution from the Oklahoma Agricultural Experiment Station. Published with the approval of the Director as paper No. 3733 of the Journal Series.

 1 1982 9 1 24 27 25 3 1982 American Peanut Research and Education Society 1982 American Peanut Research and Education Society Abstract

Data from Oklahoma peanut (Arachis hypogaea L.) performance tests from 1969 through 1978 were used to estimate genotype X environment interaction variance components for pod yield, %TSMK, % SS, % OK, and gross return per unit area. The objectives of this study were to determine if it would be advantageous to select cultivars for specific regions, and to determine the most efficient combination of years, locations, and replications to use when evaluating peanut lines.

Evidence was obtained that genotypes perform consistently between irrigated and nonirrigated locations for the traits studied. The variance of the difference between two cultivars or lines was calculated for % TSMK, pod yield, and gross return using various combinations of years, locations, and replications. Results indicate that, when testing for gross return, the time presently allotted for testing could be reduced without sacrificing accuracy.

 Key Words Arachis hypogaea L; , Cultivar evaluation; , Variance components; , Water-management systems; , Groundnut; , Pod yield; , Gross return; , Sound mature kernels; , Sound split kernels; , Other kernels