Received: March 17th, 2011 // Accepted: August 26th, 2011 // Published online: October 26th 2011
CASTRO, N.1; RUFACH, H.1; CAPELLINO, F.1; DOMÍNGUEZ, R.2 Y PACCAPELO, H.3
Twenty-two genotypes of triticales and tricepiros were assessed from 2008 to 2010 in Santa Rosa (La Pampa)for their forage yield and seventeen for grain production. A randomized complete block design with three replicates and standard plot planting were used. The differences between environments and genotypes were evaluated by an overall analysis of variance and least significant difference test (α = 0.05). The average dry matter yield values during the three years was 2508 kg ha-1 for triticales and 2007 kg ha-1 for tricepiros. Therefore, triticales yield exceeded tricepiros’ by 25%. The grain yield showed a differential behavior in the lines during each year of the trial. The average grain yield of triticales was, along the three years, 1945 kg ha-1 and in the case of tricepiros, 1442 kg ha-1. The triticales grain yield exceeded by 35% the tricepiros’. A greater stability in forage yields than in grain production was evidenced. Genetic improvement would have been more effective in triticales; however, lines of tricepiros with yields similar to those of triticales have been detected.
Keywords: genotype x year interaction, yield components.