MODIFIED MODEL FOR ASSESSMENT OF MATERNAL EFFECTS IN FIRST GENERATION OF FABA BEAN
Abstract: The statistical analysis for five parental faba bean genotypes and their hybrids, revealed highly significant differences among the five parents and their possible hybrids (F1) for all the studied traits except number of branches per plant. Preliminary information about the presence of significant variation is obtained from Hayman diallel analysis to divide total sum of square into various differences, e.i. additive, non-additive components, maternal or cytoplasmic and other reciprocal differences. The cytoplasmic components were significant for number of seeds/plant, the weight of 100 seeds and seed yield/plant. General and specific combining ability effects were partitioned according to a proposed model to estimate them for each parent when it is used as a female or a male in its hybrid combinations. Results revealed that estimated GCA effects according to Griffing’s method is equal to the average of GCA effects of each parent, after partitioning, when it is used as a male and a female in its hybrid combinations. In addition, the average of the difference between female and male GCA effects would provide valid and precise estimation of the maternal effect as previously confirmed by Hayman analysis for number of seeds/plant, the weight of 100 seeds and seed yield/plant. This would prove that maternal effect provides precise estimation to the favorable alleles, which are mainly additive ones. The SCA effects calculated according to Griffing’s method is the average of SCA effects of each cross and its reciprocal. Meanwhile, the average of the difference between SCA effects of each cross and its reciprocal, according to the proposed model, is equal to the reciprocal effects. This would prove that reciprocal effect provides precise estimation to the interaction effect between nuclear and cytoplasmic genes inside the nucleus of the cross and its reciprocal hybrid.
URL
Publication year 2015
Pages 425-442
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Author(s) from ARC
Publication Type Conference/Workshop
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