Matrouh as a common parent in crossing with some local strains of chickens [electronic resouce].

Includes references.

An experiment was conducted to investigate the effect of crossing Matrouh as a common sire parent with Inshas, Mandarah and Silver Montazah as appendage dame parents, on the inheritance of some productive traits. Regarding the parental strains, Mandarah strain had the highest body weight at 4 and 8 wk of age and weight at sexual maturity (BWSM) 329, 651 and 1435 g., respectively, while Matrouh being the highest weight at 12 wk of age (941 g). Also The desirable significant age at sexual maturity mean (SM) was achieved by Matrouh parental strain (187 d.), while the highest mean of egg number in the first 90 d. of production (EN90d.) was given by Inshas strain (48 egg). Both Matrouh and Inshas had the heaviest early egg in the first 90 d. of production (EW.) being 47 g. Heterosis % on the basis of mid-parent ranged from 1.5 to 3.8 for (BWSM), from -12 to -8.7 for (SM), from -24.4 to -16.1 for (EN90 d.) and from -3.2 to 1.1 for (EW90 d.). Estimates of additive genetic variability for body weight at 4,8 and 12 wk of age, (BWSM), (SM), (EN90 d.) and (EW.) were 0.443, 0.662, 0.189, 0.003, 0.006, 0.024 and 0.001, respectively, while estimates of dominance genetic variability were 0.282, 0.103, 0.154, 0.003, 0.005, 0.005 and 0.002 in the same trend. The results of the degree of dominance (ĥ) indicated that dominance was partial to over dominance for the loci of the studied traits. These results indicate that using Matrouh as a common parent in crossing with Inshas, Mandarah and Silver Montazah local strains of chickens can be benefit to egg production by increasing body weight at 12 wk of age, body weight at sexual maturity, early egg weight and reducing age at sexual maturity.

Summary in Arabic.

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