Estimativas de parâmetros genéticos em populações segregantes de amendoim

Abstract

The present work had for objective esteem the genetic parameters in hybrid populations of peanut for on characters the production, related to the peg and evaluate through the genotypic correlation and of the coefficient of path analysis contribution in the selection for production of pods per plant. One used F2 lines of a crossing between varieties BR 1 and advanced line CNPA 280 AM. The crossings had been carried through in house of vegetation of the UFRPE and gotten lines F 1 inbreeding. The F2 lines had been cultivated in field in the cities of Abreu e Lima and GoianaPE, in regimen of dry land, the period of May the Agost in 2008. The adoptedexperimental delineation was blocks to random with 3 blocks. The reproductive efficiency (EF1 and EF2), the total number of pegs (NGT), the number of pegs in first part of the plant (NGTI), the height of the main stem (AHP) and the number of pods (NVP) for plant had been evaluated. The data had been processed by applicatory the computational SAS assuming a mixing model. The estimates of the genetic parameters had been gotten by method RELM (Restricted Maximum Likelihood) and the individual genotypics values predicted by BLUP (Best Linear Unbiased Prediction). The environment variance was biggest the genotypic, in all the describers in the two studied environments. The magnitude of the heritability for all the describers was environments enters low and medium, indicating bigger perspective of selection in post generations. The magnitude of the heritability all the describers in the two studied environments showed enters low and medium, indicating bigger perspective of selection in post generations. The lines L.8 e L.11 showed biggest level of reproductive efficiency, more than hability for transform pegs in mature pods. The describers NGTI offers to greater possibility of selection for production of pods.