In order to evaluate the effect of phenotype and quail age on laying rate and egg characteristics, a study has been carried out in Ngaoundéré from February to August 2019. 216 quails were divided into 36 bat...In order to evaluate the effect of phenotype and quail age on laying rate and egg characteristics, a study has been carried out in Ngaoundéré from February to August 2019. 216 quails were divided into 36 batches of 6 animals each (5 females and 1 male) according to age and phenotype. The experimental animals were white, spotted white, grey and brown phenotypes and were one, six and ten months old. Eggs were collected for three weeks between 8<span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm</span><span style="font-family:Verdana;"> - </span><span style="font-family:Verdana;">4</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm and 4</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">8</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm, counted, weighed and measured. 15 eggs per phenotype were randomly selected, broken individually, which allowed the internal parameters to be evaluated. The main results show that the quails laid more eggs between 4</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">8</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm, the highest laying rate was obtained in quails at one moth of laying</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">and the spotted white phenotype had a high laying rate </span><span style="font-family:Verdana;">(74.03%) compared to other phenotypes. At one month of breeding age, quails with the spotted white phenotype showed a higher laying rate</span><span style="font-family:Verdana;"> (93.34%), brown (78.75%) and grey (74%) at six months and finally white (71%) at ten months. Weight, height, diameter and egg shape index did not vary with the quail phenotype. The highest egg volume (12.60 ml) was found in white quails. The shells of white spotted quails were thicker than those of other phenotypes. Grey quails laid eggs with the highest Haugh</span></span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;">s index and proportion of edible matter. Brown quail eggs were found to have a higher proportion of dry yolk matter. Dry matter and moisture content of albumen did not vary with the quail phenotype. Considering the results obtained, it has been concluded that spotted white phenotype quails are more suitable for reproduction as they presented the best egg-laying proportions of edible matter.</span>展开更多
文摘In order to evaluate the effect of phenotype and quail age on laying rate and egg characteristics, a study has been carried out in Ngaoundéré from February to August 2019. 216 quails were divided into 36 batches of 6 animals each (5 females and 1 male) according to age and phenotype. The experimental animals were white, spotted white, grey and brown phenotypes and were one, six and ten months old. Eggs were collected for three weeks between 8<span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm</span><span style="font-family:Verdana;"> - </span><span style="font-family:Verdana;">4</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm and 4</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">8</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm, counted, weighed and measured. 15 eggs per phenotype were randomly selected, broken individually, which allowed the internal parameters to be evaluated. The main results show that the quails laid more eggs between 4</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">8</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">pm, the highest laying rate was obtained in quails at one moth of laying</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">and the spotted white phenotype had a high laying rate </span><span style="font-family:Verdana;">(74.03%) compared to other phenotypes. At one month of breeding age, quails with the spotted white phenotype showed a higher laying rate</span><span style="font-family:Verdana;"> (93.34%), brown (78.75%) and grey (74%) at six months and finally white (71%) at ten months. Weight, height, diameter and egg shape index did not vary with the quail phenotype. The highest egg volume (12.60 ml) was found in white quails. The shells of white spotted quails were thicker than those of other phenotypes. Grey quails laid eggs with the highest Haugh</span></span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;">s index and proportion of edible matter. Brown quail eggs were found to have a higher proportion of dry yolk matter. Dry matter and moisture content of albumen did not vary with the quail phenotype. Considering the results obtained, it has been concluded that spotted white phenotype quails are more suitable for reproduction as they presented the best egg-laying proportions of edible matter.</span>
