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Prof. Ali Abd El-Maksoud El-Hosary :: Publications:

Genetical Studies on Durum Wheat (Triticum durum L.)
Authors: AA. AbuJ-Naas, A.A. El-Hosary, and M.M. Sakr
Year: 1991
Keywords: Not Available
Journal: Not Available
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Not Available
Local/International: Local
Paper Link: Not Available
Full paper Ali Abd El-Maksoud El-Hosary_23.pdf
Supplementary materials Not Available

HALF diallel set of orosses involving five parental lines were used to estimate the type and relative amount of generic variance components for grain yield per plant, number of spikes per plant, 1000-kernel weight, protein percentage, and fermentation time. Genotype mean squares for all traits studied were highly signifi cant. Additive type of gene action was found to reach the level of sig nificnace in most cases. Dominance gene effect was larger. in magni tude than the additive ones and appeared to be the more prevailing for all the studied traits. High to moderate estimates for heritablity in the broad sense were accompanied by moderate to low for the narrow ones were detected for most traits. Studies on the nature and degree of dominance revealed the exis tance of over dominance for all the traits except protein percentage where partial dominance was obtained. The negative and positive al leles were equally distributed among the parental population in all cases. The correlation between pareital performances and their order of dominance revealed that low grain yield and l.000-kearlsl weight, and few number of spikes per plant behaved as dominant traits. No particular trend could be detected for the other two traits. The new Egyptian policy of wheat production is to increase the area cultivated by durum wheat in Upper Egypt because of its high tolerance to the prevalent

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