Cultivar x Environment Interactions for Kernel Yield in Virginia Type Peanuts(Arachis hypogaea L.) in Queensland

摘要

Twelve Virginia type peanut cultivars were evaluated for kernel yield at 10 sites in 1979 and nine sites nin 1980 in southern and northern Queensland. Two trials, harvested 9-14 days apart, were grown at each nsite in 1979, resulting in a total of 29 test environments. In 1979 the cultivar x site (c x s) interaction nwas significant, although the cultivar x harvest date within-site interaction was not. Over all 29 nenvironments the cultivar x environment (c x e) interaction was significant. In orthogonal sets of five nsites and 2 years, cultivar x year x site interactions were significant, whereas cultivar x year and c nx s interactions generally were not. nPattern analysis revealed that cultivars of dissimilar genetic origin had different productivity nresponses across environments. An environmental classification based on c x e interactions indicated nthat there were no temporal or closely related regional environment groups with similar c x e ninteractions. Lower critical percentage differences between new and established cultivars in a pre-release ntesting program would be obtained by adding environments rather than replicates, or by accepting a ngreater risk of misjudging a new cultivar's superiority (higher probability of type I error).