Performance of faba bean parents in different hybrid combinations and locations [electronic resource].

Includes references.

The present study was carried to investigate type and relative amount of genetic variance components and their interaction with the location, in addition to evaluating heterosis of some quantitative characters in faba bean (Vicia faba L.). For this objective, a diallel crossing was performed without reciprocals, including eight varieties (Rena blanka, Triple white, Tenova, Tena, Giza 2, Giza 716, Giza 461 and Giza 429) which were evaluated in a completely randomized block design with three replications over two locations. The most important studied characters were plant height, number of pods per plant, first pod position, pod length, yield/plant, number of seeds per plant, number of seeds per pods and IOO-seed weight per plant. For the effect of location, significant mean squares were detected for all traits except plant height. Mean squares for genotypes, parents and hybrids were highly significant for all characters. Significant mean squares of parents vs. hybrids were showed for all traits except number of pods per plant and pod length. Both variances of general and specific combining abilities (GCA and SCA) were found to be highly significant for all traits. The magnitudes of the ratios of GCAISCA showed that the additive and additive X additive types of gene action were the more important factors for all traits except number of pods per plant. The interactions between locations and both types of combining abilities were highly significant for all traits. The parental line Giza 716 was the best combiner for plant height, first pod position, seed yield per plant, number of seeds per plant and 1 OO-seed weight. The parental line Rina blanka expressed significant desirable GCA effect for plant height, pod length per plant, seed yield per plant, number of seeds per plant and 100-seed weight.

Summary in Arabic.

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