Bean yellow mosaic virus (BYMV) has been recognized as one of the major economic disease and reduced a considerable destructive in seed yield, particularly, when plants were infected at the beginning stage of faba bean growing regions of Egypt. Little genetic information is available on the resistance of Vicia faba to BYMV disease. Hence, this study was conducted to determine the relative importance of general (GCA) and specific (SCA) combining ability, maternal and non-maternal reciprocal effects on resistance to BYMV in selected faba bean genotypes through mechanical transmation of BYMV. A complete diallel mating scheme including reciprocals of six faba bean genotypes varied in their resistant and susceptible to BYMV were evaluated in the Experimental Farm, Faculty of Agriculture, Suez Canal University, Ismailia, Egypt during two seasons (2008/09 & 2009/010). The results show that the combining ability analysis revealed that both additive and non additive gene effects were present at this juncture and played a major role in the genetic resistance to BYMV. The crosses between the resistant and susceptible faba bean genotypes showed intermediate disease reaction to the BYMV, suggesting a polygenic system of resistance to BYMV. Significant maternal and specific reciprocal differences among the parents and their crosses indicated that maternal inheritance is involved in the reaction of faba bean genotypes to BYMV. Also, significant genotype x years interaction suggested a deficient in stability in the development of virus pathogen on faba bean plants. Therefore, recurrent selection would be appropriate for accumulating genes for resistance to BYMV in V. faba and progeny
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