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| dc.contributor.author | Addis Getu | |
| dc.date.accessioned | 2021-08-16T06:10:12Z | |
| dc.date.available | 2021-08-16T06:10:12Z | |
| dc.date.issued | 2021-08-16 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/12418 | |
| dc.description.abstract | An exploratory field survey was conducted in north Gondar zone, Ethiopia to identify and characterize local chicken ecotypes from November to August in 2011112. Seven qualitative and twelve quantitative traits from 450 adult chickens were considered. Ninety respondents were selected using systematic simple random sampling techniques. Necked neck, Gasgie and Gugut ecotypes were identified from potential area of Quara, Alefa and Tache Armacheho districts, respectively. This research finding revealed that chicken production system of the study area is mixed traditional with small feed supplementation. Disease, predators, lack of market facility, lack of water and poor extension service were the major barriers of poultry production. Wilcoxon signed ranks test for breeding objectives of the respondents were incomes, cultural/religious reasons, more meat and egg production with the overall index value of O.3, 0.27 0.22 and 0.21, respectively. Overall genetic improvement of the preferred traits were varied in sexes like comp type, plumage color, body weight, breeding ability and body conformations with the index values of 0.25, 0.23, 0.22, 0.22 and 0.08 for males and 0.09, 0.22, 0.20, 0.23, 0.26, respectively for females through uncontrolled breeding. Reproductive performance study results revealed that in females' age at first sexual maturity was 4.70±0.27, 5.50±0.17 and 6.08±0.20 with average age of 5.43±0.14 month and in males it was 4. 30±0. 27, 4. 85±0.14 and 5. 13±0. 20 with the average age of 4. 76±0.13 month in favor of Necked neck, Gasgie and Gugut chickens, respectively. Red (26.89%) and white (15.56%) colors were the average dominant plumage characters of chickens. In addition, averages least squares means indicated that the body weight and liner body measurements (wing span) of chickens were 1.46±0.01kg and 37. 04±0.13cm, respectively. Morphometric measurements also indicated that body weight and body measurement of Necked neck and Gasgie chicken ecotypes were significantly (p < 0.01) higher than Gugut ecotype except in shank circumstances. Sex and ecotype were the significant (p < 0.01) sources of variation for both body weights and linear body measurements. Multivariate analysis heat ratio result showed that the uniqueness of chickens was ranged from 85.3 to 94%. The correlation of body weight with other some liner body measurements for all ecotypes in both sexes were significant (p < 0.01). Traits like wingspan (r = 0.64, P < 0.01) and (r = 0.59, P < 0.01) for Necked neck male andfemale, wattle (r = 0.67, P < 0.01) and body length (r = 0.59, P < O.Ol)for Gasgie male and female chicken ecotypes, respectively were some of near to highly correlated traits. Highly correlated traits are a good predictor of body weight of chickens. In general, almost all qualitative and quantitative natures of the newly investigated chicken are different from other identified Ethiopian chickens. Therefore, further study should be employed to investigate the remaining chicken ecotypes in the country. | en_US |
| dc.language.iso | en | en_US |
| dc.subject | ANIMAL GENETICS and BREEDING | en_US |
| dc.title | PHENOTYPIC CHARACTERIZATION AND BREEDING OBJECTIVES OF LOCAL CHICKEN ECOTYPES IN NORTH GONDAR ZONE, ETHIOPIA | en_US |
| dc.type | Thesis | en_US |
