NDLI: Diallel crossing analysis for livability data involving two standard and two native Egyptian chicken breeds

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Diallel crossing analysis for livability data involving two standard and two native Egyptian chicken breeds

Content Provider	Semantic Scholar
Author	Iraqi, Mahmoud M. Afifi, E. A. Abdel-Ghany, A. M. Afram, Martin
Copyright Year	2009
Abstract	Two local breeds, namely Fayoumi (FA) and Dandarawi (DA) and two exotic ones named Rhode Island Red (RIR) and White Leghorn (WL) were used in 4x4 diallel cross mating system. Thirtytwo breeding pens were used. Two sires were mated to 16 dams in each breeding pen. Progeny of F1 of all breed groups (16 groups) were produced in three hatches within two years. Records of 7285 chicks were used to estimate purebreds, heterosis, general (GCA) and specific (SCA) combining abilities, maternal ability (MA) and reciprocal or sex-linked (SL) effects on livability traits. A simple additive genetic model was used to analyze adjusted livability records (expressed as numbers alive counted from hatch up to 12 weeks of age) to determine the crossbreeding effects responsible for the differences among breeding groups. Results showed that WL chicks had superiority in livability percentage over all purebreds during all the studied periods, followed by RIR. Differences between means of livability of exotic and native breeds were significant (P<0.05). Most of crossbreds had higher livability than purebreds. Heterotic effect was highly significant (P<0.01) on livability traits during all the studied periods. Crossbreds of FAxDA gave the highest heterotic effect for livability percentage during all the studied periods, except at 12 weeks of age. Crossbreds of RIRxFA, WLxFA and WLxDA, respectively ranked as the first, second and third for economic heterosis of complementary traits (livability and body weight). They were 37.6, 31.2 and 25.0%, respectively. Significant (P<0.01) differences among purebreds for the effects of MA, GCA, SCA and SL were obtained on all livability traits. The DA breed gave the highest and positive effect of GCA on all livability traits. The FA had superior estimates for MA in all studied traits. Clearly, the RIRxFA and WLxDA crosses gave the highest and positive estimates of SCA for most traits of livability traits compared to the other crossbreds. The WLxDA cross had superior SL effects for traits at 8 and 12 weeks of age. From the previous results, it could be concluded that RIR sires (as an exotic breed) and FA dams (as a native breed) would be selected to produce broilers with higher viability in Egypt through crossbreeding programs.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.bu.edu.eg/portal/uploads/Agriculture/Animal%20Production/1072/publications/Mahmoud%20Maghraby%20Iraqi%20Amer_PAPER_18.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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