Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep
Genetic parameters and genetic trends for growth, reproduction, milk production and composition traits were estimated for Syrian (S) and Turkish (T) Awassi sheep and their crosses maintained at the International Center for Agricultural Research in the Dry Areas Tal Hadya station, Aleppo, Syria (now...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2019
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| Acceso en línea: | https://hdl.handle.net/10568/108002 |
| _version_ | 1855543610503593984 |
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| author | Haile, Aynalem Hilali, M. El-Dine Hassen, H. Lobo, R.N.B. Rischkowsky, Barbara A. |
| author_browse | Haile, Aynalem Hassen, H. Hilali, M. El-Dine Lobo, R.N.B. Rischkowsky, Barbara A. |
| author_facet | Haile, Aynalem Hilali, M. El-Dine Hassen, H. Lobo, R.N.B. Rischkowsky, Barbara A. |
| author_sort | Haile, Aynalem |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Genetic parameters and genetic trends for growth, reproduction, milk production and composition traits were estimated for Syrian (S) and Turkish (T) Awassi sheep and their crosses maintained at the International Center for Agricultural Research in the Dry Areas Tal Hadya station, Aleppo, Syria (now in Terbol station in Lebanon). The data were spread over 9 years. The individual breed additive effects of T were positive and significant (P0.05) for most growth traits. Crossing of T with S, however, resulted in desirable and significant (P<0.05) individual heterosis effects for all the reproduction, milk production and constituent yields. The heritability (h²) estimates, both direct and maternal, were low for BW, WW, WG and all reproductive traits indicating major influence of environmental factors, whereas milk yield and composition had medium values. Birth weight had moderate genetic correlation with WW and WG. The genetic correlation between WW and WG was high (0.724±0.951). Lambing interval had large negative genetic correlation with LWB and LWW. However, LI had medium significant correlations with all the milk production and composition traits. Larger litter weights at birth had high and negative influence on milk yield of the dam and its constituents. Genetic changes over years for all traits were non-significant. The lack of genetic change in the studied traits calls for systematic and organized selection scheme. |
| format | Journal Article |
| id | CGSpace108002 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1080022025-09-25T13:01:45Z Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep Haile, Aynalem Hilali, M. El-Dine Hassen, H. Lobo, R.N.B. Rischkowsky, Barbara A. sheep small ruminants animal breeding genetics milk production dairies Genetic parameters and genetic trends for growth, reproduction, milk production and composition traits were estimated for Syrian (S) and Turkish (T) Awassi sheep and their crosses maintained at the International Center for Agricultural Research in the Dry Areas Tal Hadya station, Aleppo, Syria (now in Terbol station in Lebanon). The data were spread over 9 years. The individual breed additive effects of T were positive and significant (P0.05) for most growth traits. Crossing of T with S, however, resulted in desirable and significant (P<0.05) individual heterosis effects for all the reproduction, milk production and constituent yields. The heritability (h²) estimates, both direct and maternal, were low for BW, WW, WG and all reproductive traits indicating major influence of environmental factors, whereas milk yield and composition had medium values. Birth weight had moderate genetic correlation with WW and WG. The genetic correlation between WW and WG was high (0.724±0.951). Lambing interval had large negative genetic correlation with LWB and LWW. However, LI had medium significant correlations with all the milk production and composition traits. Larger litter weights at birth had high and negative influence on milk yield of the dam and its constituents. Genetic changes over years for all traits were non-significant. The lack of genetic change in the studied traits calls for systematic and organized selection scheme. 2019 2020-04-15T18:19:45Z 2020-04-15T18:19:45Z Journal Article https://hdl.handle.net/10568/108002 en Open Access Elsevier Haile, A., Hilali, M., Hassen, H., Lobo, R. and Rischkowsky, B. 2019. Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep. Animal 13(2):240-247. |
| spellingShingle | sheep small ruminants animal breeding genetics milk production dairies Haile, Aynalem Hilali, M. El-Dine Hassen, H. Lobo, R.N.B. Rischkowsky, Barbara A. Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep |
| title | Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep |
| title_full | Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep |
| title_fullStr | Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep |
| title_full_unstemmed | Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep |
| title_short | Estimates of genetic parameters and genetic trends for growth, reproduction, milk production and milk composition traits of Awassi sheep |
| title_sort | estimates of genetic parameters and genetic trends for growth reproduction milk production and milk composition traits of awassi sheep |
| topic | sheep small ruminants animal breeding genetics milk production dairies |
| url | https://hdl.handle.net/10568/108002 |
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