Choice of breeding method for improving yield and yield stability in faba bean

Kifah Gharzeddin, Fouad Maalouf, Bolous Khoury. (12/2/2017). Choice of breeding method for improving yield and yield stability in faba bean. Beirut, Lebanon.

Abstract

Faba bean (Viciafaba L.) is partially allogamous crop with outcrossing rate varied from 0.3 to 0.83 with an average of 0.5' Breeding methods applied to this crop depends on the levels of outcrossing and the genetic basis of the varieties, and varied frorn location to location depending on pollinator activities. Different breeding methods were applied to improve productivity ,r.h u, pJigr"" method, recurent selection and development of synthetics. The purpose of this research is to evaluate the efficiency of different breeding methods. These methods were applied to six different crosses to develop 24 Fz lines by pedigree, 30 Fr lines by recurrent selection during five successive seasons and nine Synl lines using top cross from 20i3 to 2015. The lines were evaluated in two cropping seasons (201412015 winter and 2015 summer) in alpha lattice design with two replications. nays to flowering (nnI-R), days to maturity (DMAT), number of branches per plant (BRPT), pods per plant (PPNT), number of seeds per pod (SpOi, number of seeds per plant (SPL), hundred Seed Weight (SWl00), single-plant yield (Spy), grain yieid per ha (GY) were recorded. Analysis of variance showed that genotypes, breeding -.ihod" (BM) and G X BM were found significant for DFLR, DMAT, SPP and GY. Averag" gruitr yield developed by recurrent method in both seasons were superior than the average yield of lines developea by pedigrel methods andby synthetics Synl. Stability analysis indicatedthat the lines developedbyrecyrrent and synthetic methods were higher yielding and high stable than those developed by p"Aigt". methods.