قوة الهجين و القدرة على الائتلاف لبعض الصفات الكمية في الفول (Vicia faba L.)‎

Abstract EN

A half-diallel cross carried out among six pure lines of Faba Bean were evaluated at Otaya Research Station, General Commission for Scientific Agricultural Research (G.C.S.A.R.) Syria, during the growing season (2009/2010 and 2010/2011), to study heterosis, general and specific combining ability for seed yield, pods per plant, days to maturity, number of branches per plant and pod length traits.

General (GCA) and Specific (SCA) combining ability mean squares were significant for all traits except GCA mean squares for pods per plant and number of branches per plant traits, and SCA mean squares for days to maturity.

GCA values were 34.65, 87.67, 2901, 1.84, 135.38 for pod length, days to maturity, seed yield, number of branches per plant and pods per plant respectively, whereas SCA effects reached to 5.81, 1.27, 113.43,1711, 19.60 for pod length, number of branches per plant, pods number per plant, seed yield and days to maturity respectively, which indicate to high importance for additive and non-additive gene action in controlling the inheritance of the most studied traits.

Estimated σ2GCA/σ2SCA ratios for all traits showed that non-additive gene action was more importance than addditive gene action in controlling seed yield (0.09), pods per plant (0.02), number of branches per plant (0.03) and pod length (0.86) traits, while indicated that days to maturity (1.91) trait was controlled by additive gene action.

Heterosis percentage compared with mid and better parents was significant for all traits except days to maturity, Heterosis effects for seed yield varied between 14.13,184.55 and 0.84, 176.31 , relative to mid and better parents respectively.

GCA effects showed that the lines Rienaplanca and Aquadolce were good general combiners for seed yield.

SCA effects showed that four hybrids were the best F1 cross combinations for seed yield such as (Aquadolce × Rienaplanca).