GENETIC PROGRESS EVALUATION IN BEAN FAMILIES, BASED ON THE POOLED ANALYSIS WITH COMMON CONTROLS

INTRODUCTION In the a breeding program leading, various strategies can be used and they are capable to yield good results. However, hybridization is a routine in current breeding programs and it has been the main new bean lines source (Menezes Júnior et al. 2013). The big difficulty in the autogamous plants breeding is finding two parents who bring together all the interest phenotypes. In this case, the alternative would be to promote successive cycles of selection and interbreeding of the best individuals or the best families (Geraldi 1997). The genetic progress periodic estimation is fundamental to guide the plant breeders about the selective strategies used and the alternatives that could be adopted to increase their efficiency. Thus, the procedures commonly used to compare selective cycles are the different cycles families or lines evaluation, which can be done using common witnesses (Ramalho 1996). The work objective was to estimate the genetic progress of two recurrent selection cycles based on the evaluation of families with common controls. MATERIAL AND METHODS The experiments were carried out at the Experimental Station of Coimbra, belonging to the Department of Plant Sciences of the Federal University of Viçosa (UFV). The base population, zero cycle (C0), it was obtained by the combination of 20 carioca type grains, with favorable phenotypes for several agronomic interest characters. The parents were recombined in a circulating diallel design, with each parent participating in two crosses, generating 20 populations. From these populations, the families were derived and evaluated for three generations, in the generations F2:4 and F2:5. The same recombination procedure and C0 evaluation were performed in cycle one (CI)