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Estimation of general and specific combining abilities from a diallel cross of three inbred lines of Fayoumi chicks

Annales de Génétique et de Sélection Animale
Springer (Biomed Central Ltd.)
Publication Date
DOI: 10.1186/1297-9686-9-3-387
  • Research


Estimation of general and specific combining abilities from a diallel cross of three inbred lines of Fayoumi chicks M. SOLTAN, F. H. ABDOU, M. ABD-ELLATIF H. AYOUB* Faculty of Agvic., Shebin EL-Kom, Tanta University, Egypt. Summary Three inbred lines of Fayoacmi chicks were incrossed in diallel mating system to estimate general and specific combining ability. The inbreeding coefficients in three inbred lines were 25, 37.5 and 5o per cent. L 25 showed the highest g.c.a. in fertility and body weight at 8 weeks of age. L 37, 5 exhibit- ed the best g.c.a. in viability, while L 50 gave the best g.c.a. in hatchability. The inbreeding coefficient of sire had a highly significant effect on both fertility and hat- chability while its effect on viability and body weight at 8 weeks of age was not significant. L z5 X L 37,5 incrossbred chicks gave the best s.c.a. in viability and body weight, fertility and hatchability. Introduction The model of inbreeding and incrossing has been applied successfully in chic- ken production and has played a major role in many broiler and egg production investigation programs. YAO (ig6i) using diallel crosses of inbred lines of chickens reported that line effect was highly significant for 10 - week body weight. COLE and HuTT (1962) found that hybrids resulted from crossing 2 strains of white Leghorns showed a high degree of heterosis in egg production, hatchability and body weight. ErsErr et al. (1964) reported that cross effects were highly significant for 8 week body weight and adult mortality. HAZEL and LANtoREUx (zg47), and GoTO and NoRDSKOG (rg5g), using Leghorn breed of Chicken suggested that nicking was not of major importance. HALE * Faculty of Agric., Ain Shams Univ. and CLAYTON (1965) found the same concept in Leghorn breed and crosses, showing that genetic interactions were unimportant. HILL and NORDSKOG (1958) stressed the importance of general combing ability over specific combining ability. WEARDEN et al. (1964) in a full-diallel cro

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