Coffea canephora breeding: estimated and achieved gains from selection in the Western Amazon, Brazil

ABSTRACT: Gain from selection is an important criterion in quantifying the efficiency of breeding programs. This study quantified gain estimated under experimental conditions and realized achieved field, seeking to interpret Coffea canephora selection. For that purpose, we considered experiments began 2004 with directed hybridizations obtain new hybrid progenies. From a population composed 288 individuals, 12 genotypes were selected 2005 2012, amplitude gains 127.70 to−19.19%. Those evaluated 2012 2018 clonal tests four environments Western Amazon. The environment exhibited greatest correlation between predicted genetic values observed field was Ouro Preto do Oeste, RO (0.67), location which plants selected, followed by Alta FlorestaD´Oeste, (0.44), Rio Branco, AC (0.43), Porto Velho, (0.37).Experimental showed effect due dominance deviations approximately three times greater than additive effect. Nine clones higher at two lower performance.The clone G17-P7 high low performance. positively correlated plant performance (r=0.55), allows reduction original set more promising be grown multiple environments, optimizing time resources.