Variability and gene action for earliness and yield components of some faba bean hybrids at Nubaria region [electronic resource].

Includes references.

Three crosses of faba bean (Vicia faba L.)( Giza 716 X BPL710),( T.W.X BPL 710) and (TW X NA112), each with six populations ( P1,P2,F1,F2,BC1 and BC2 ) were evaluated in the winter season of 2010/2011 for earliness traits, yield components and some growth attributes. Significant negative heterotic effects over mid-parents were detected for flowering and maturity dates with regard to both crosses I and II. On the other hand, the three crosses showed highly significant positive heterotic effects relative to the better parent for both traits in the three crosses. Significant positive heterotic effects relative to mid and better parents were detected for plant height, number of branches/plant, seeds/plant, 100- seed weight and seed yield/plant in the first cross. Over dominance towards the higher parent was found for plant height, number of branches/plant, seeds/plant, 100- seed weight and seed yield/plant, in the first cross. Significant negative values of inbreeding depression were detected for all studied characters in the three crosses except number of seeds/plant in the three crosses and days to flowering and maturity dates in the second and first crosses, respectively. Highly Significant positive or negative deviation for F2 (E1) and back crosses (E2) were detected for all traits. Additive gene effects were significantly exhibited in all traits except number of seeds/ plant and 100- seed weight for the cross Ш and cross I, respectively.

Summary in Arabic.

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