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Effect of selection and crossing between layer local ( barred and brown ) with broiler dam line Fawbro on phenotypic correlation | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 12, Issue 4, 2012, Pages 24-28 | ||
| Authors | ||
| Samawal S. Al-Tikriti; Basher .T. Al-Tikriti; and Ismail.H. Ismail | ||
| Abstract | ||
| In this study , males from the two local unselected barred and brown ( BAU and BRU ) lines were chosen randomly to be crossed with hens from the same line and with the broiler dam line Fawbro ( CD ) to prodnce the normal unselected hybrids , these four groups were considered as a control flocks , further more males from two selected local Brown ( BRS ) and Barred ( BAS ) lines were chosen from a highly egg producer layers and were crossed with the broiler dams ( Fawbro ) and with hens from then own lines , for the production of the improved hybrids , the broiler dam Fawbro performance was also studied in this work.Used in this study 675 layn hen were allotted 75 female in each treatment and divided to three replicate for each replicate content of 25 female for investigate the effectiveness crosses on the phenotypic correlation for some eggs production characters . the phenotypic correlation between age in sexual maturity with average weight of one egg and average egg weight , were positive correlation each of treatment while of the phenotypic correlation between age at sexual maturity with eat of number of eggs and egg mass were negative , the value of correlation between average weight of one egg with average weight egg ( 0.35 – 0.98 ) .The phenotypic correlation between the average egg weight and average egg mass weight were negative and significant for all genetic groups and ranged between (0.38- and 0.93–). Highly significant positive correlations between average egg production and average egg mass weight were observed for all genetic groups (0.49-0.99). | ||
| Keywords | ||
| Selection; Crossing; layer local | ||
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