Robust row-column designs for complete diallel cross experiments

This paper investigates the robustness of variance-balanced row–column designs for complete diallel cross experiments for estimating the comparisons among the general combining ability parameters against the loss of observations. A necessary and sufficient condition of robustness as per connectedness criterion is obtained. The robustness of optimal row–column designs of Gupta and Choi has been investigated for the loss of any m (≥ 1) observations in a column and for the loss of any two observations in the design. The study of robustness has also been conducted as per A-efficiency criterion.