Generation mean analysis of earliness and chocolate spot disease resistance and qualitative variation in the storage proteins of three Vicia faba L. crosses
2009
Abo Mostafa, R.A.I. | El-Rodeny, W.M. | Hassanein, A.M.
The data revealed that, the parental genotypes and their crosses had the highest value of variation according to relation to chocolate spot reaction and maturity date. Heterosis over mid and better parent for all traits were highly significant except chocolate spot reaction in the two crosses; (Rena Mora x Sakha1) and (Sakha 2 x T.W.) relative to mid parents. And also, for no. of pods/plant in the cross; (Rena Mora x Sakha1) relative to better parent. Potence ratios were exceeded unity for most traits indicating over dominance. On the other hand, the values of this parameter were less than unity in the cross; (Sakha 2 x T.W.) for maturity date, no. of branches/plant, seed yield/plant(g) , 100 seed weight and chocolate spot reaction, indicating partial dominance. The inbreeding depression estimates were highly positively significant for no. of pods/plant, no. of seeds/plant and seed yield/ plant(g) in the two crosses (Rena Mora x Sakha 1) and (Giza 3 x Rena Mora). The additive type (a) was significant positive or negative values in all of crosses for all traits except in the cross; (Rena Mora x Sakha 1). For dominance effect (d) it was and higher in magnitude than that of additive type of gene effects. The additive x additive gene effect was highly positive significant in most crosses except in the cross; (Rena Mora x Sakha 1) for no. of branches/plant. However, highly significant positive epistatic gene action (ad) was observed in the first cross; (Rena Mora x Sakha 1) for no. of branches/plant. no. of pods/plant, no. of seeds/plant and chocolate spot reaction. Heritability values in broad-sense were generally higher than the corresponding values in narrow-sense in ail crosses for all traits: The additive genes seems to play an important role of the inheritance of maturity date, no. of branches/plant, no. of pods/plant and chocolate spot reaction in the cross; Rena Mora x Sakha1, where the differences between broad and narrow-sense heritability were closest.
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