Pure Line Breeding Progress of the Tianfu Broiler Commercial Lines
[Objective]In order to optimize the breeding and selection of Tianfu Broiler Commercial Lines,this study analyzed the breeding condition of three strains.[Method]The weight growth,feed con-version ratio,body-size traits,and slaughter traits were compared and analyzed in thirteen generations of Tianfu Commercial Broiler Lines.[Result]The 70-day weight gain of TF03 strain in thirteenth genera-tion was significantly higher than those of TF01 strain and TF02 strain(P<0.01).The body-size traits of 65-day-old cocks,like keel length,chest circumference and chest width as well as slaughter traits like slaughter weight,half-eviscerated yield and lean weight,were significantly higher than those of TF01 strain and TF02 strain(P<0.05).Compared with the sixth generation,the 70-day-weight of thirteenth generation was increased significantly(P<0.01)in three strains,and the coefficient of variation was un-der 10%.[Conclusion]Constantly breeding by thirteen generations has achieved remarkable results in trait selection of three pure strains of Tianfu Commercial Broiler Lines.
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