Prediction of F-3 populations based on unbalanced diallel crossing systems

The objective of this paper was to predict the properties of F-3 generation of the dry bean based on F-1 generation data from diallel crosses. Eight h ybrid combinations from compatible crosses between seven parents (Diacol An dino, Ica Lhanogrande, Ica Tundama, Rojo 70, Rio Tibagi, Carioca, and Roxo) were analyzed by comparing the unbalance circulating and partial diallel c rossing systems. The F-1 hybrid combinations and the parents were arranged in a complete randomized design with varying number of replications per tre atment under greenhouse conditions. The F-3 generation was grown in two are as under field conditions in a complete randomized block design. The follow ing traits, number of pods per plant and seed weight per plant, were evalua ted. Prediction based upon general capacity of combination (CGC) in F-1 gen eration was more efficient than performance in F-1 generation to predict F- 3 segregant hybrid combinations. Negative correlation between the generatio ns observed and the predicted generations was noted when the unbalanced cir culating diallel crossing systems were used.