lGENETIC STUDIES ON BREEDING FABA BEAN FOR DROUGHT TOLERANCE: 2 - HETEROSIS AND COMBINING ABILIYY

Omar, S. A.; Belal, A. H.; El-Sarag, Eman I.; El-Metwally, M. A.

doi:10.21608/jpp.2014.64742

lGENETIC STUDIES ON BREEDING FABA BEAN FOR DROUGHT TOLERANCE: 2 - HETEROSIS AND COMBINING ABILIYY

Document Type : Original Article

Authors

¹ Plant Breeding Unit, Plant Genetic Resources Dept., Desert Research Center, Cairo, Egypt.

² Plant Production Dept., Faculty of Environ. Agric. Sci., Suez Canal University, El-Arish, Egypt.

10.21608/jpp.2014.64742

Abstract

Selection for physiological characteristic and evaluation the performance and degree of drought tolerance of the six selected faba bean cultivars and their F₁ crosses were tested under two levels of soil moisture. Randomized complete blocks design with three replicates was used in each experiment, (normal & stress environments) during the two growing seasons 2006/07, 2007/08 at North Sinai Research Station, Desert Research Center. The results indicated that significant mean squares due to genotypes were obtained for all characters under both environments and the combined data. The ratio of specific combining ability (S.C.A.) × environment (Env.) /S.C.A. was much higher than ratios of general combining ability (G.C.A.) × environment Env./G.C.A. for all characters except plant height and number of branches. The parental Giza 429 (P₄), Giza 716 (P₅) and Giza 2 (P₆) gave positive and significant (ĝi) for yield and one or more of its components under normal and stress irrigation as well as the combined data. Meanwhile, the cross combination Nubaria 1 (P₄) × Giza 429 (P₁) appeared to be the best promising hybrid for breeding to increase seed yield per plant which gave significant positive Ŝ_ij for yield and some of its component under both environments as well as the combined data.

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