Comparative Growth Parameters and Feed: Gain Ratio of Pureand Inbred Nigerian Indigenous Chickens

Autor: Sylvanus I. Omeje, C. C. Ogbu, E. N. Nwachukwu
Rok vydání: 2014
Předmět:
Zdroj: IOSR Journal of Agriculture and Veterinary Science. 7:41-46
ISSN: 2319-2380
2319-2372
DOI: 10.9790/2380-071234146
Popis: The objectives of the study were to evaluate and compare the growth performance (body weight, BWT, and body weight gain, BWG), feed intake (FI) and feed:gain (F:G) of G1 and G2 generations of inbred Nigerian indigenous chickens (NIC). A total of 500 chicks (250/generation) were used for the study. The G1 birds were produced from sire families established from a base population of random breeding NIC whereas the G2 birds were progenies of half and full sib matings involving the G1 population. Result showed significant (P˂ 0.05) sire and line effects for BWT in G1 and G2 generations, respectively. Feed intake did not vary much between sire groups (G1 generation) but varied without a definite trend between sire lines in G2 generation. Differences between sire group and their progenies were non-significant in most of the parameters except for BWT at hatch and 12 wk of age (G1S1 vs G2L1: 27.06 ± 0.41 vs 24.42 ± 0.29g and 671.42 ± 19.66 vs 619.85 ± 18.60g, respectively), and at wk 16 and 20 (G1S2 vs G2L2 for wk 16: 794.33 ± 22.58 vs 741.93 ± 18.50g and G1S4 vs G2L4 for wk 20: 950.98 ± 22.05 vs 888.33 ± 18.50g). For feed intake, significant differences were observed at wk 4 and 20 (G1S5 vs G2L5: 17.84 ± 0.46 vs 21.64 ± 0.63g and 84.78 ± 1.80 vs 90.16 ± 1.87g, respectively). Comparison between G1and G2 generations for growth parameters was significant for BWT at hatch, 12 and 20 wk of age ( % Δ = -4.95 * , -3.91 and -4.00, respectively, P˂ 0.05), FI at wk 4 and 20 (18.66 ± 0.24 vs 20.20 ± 0.29; % Δ = 8.50 * and 88.94 ± 0.90 vs 92.78 ± 0.81, % Δ = 4.32 * , respectively, P˂ 0.05), BWG and F:G across the age periods (range: -13.72 to -24.97%, and 19.93 to 27.97%, respectively, P˂ 0.05). It was concluded that inbreeding could be used to establish sire lines to be used in crosses for the improvement of productive traits in populations of NIC.
Databáze: OpenAIRE
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