Nearest-neighbor-adjusted means as a selection criterion within two soybean populations

When the nearest-neighbor adjustment (NNA) reduces the magnitude of the residual mean square, plant breeders have the option of selecting geonotypes on the basis of the NNA or unadjusted (UNADJ) means. The actual gain from selection for a specific set of experiments can be compared when selection is based on each criterion. The authors objective was to compare the yields of lines selected with the NNA and UNADJ criteria. In 11 out of 12 cases, the lines selected by the NNA and UNADJ crieteria were equal in yield when compared in testing environments. -from Authors