Abstract:
To evaluate the growth performance and reproductive performances of different binary hybrid combinations among three breeds of pigeons, namely the Shiqi pigeon, the white Carnean pigeon and the European pigeon, and to find the optimal binary hybrid. Four combinations of Shiqi pigeon(X)■ × European pigeon(L)♀(XL group), Shiqi pigeon(X)■ × white Carnean pigeon(Y)♀(XY group), European pigeon(L)■ × white Carnean pigeon(Y)♀(LY group) and European pigeon(L)■ × Shiqi pigeon(X)♀(LX group) were chosen with 170 pairs each for a one-year growth performance and reproductive performance measurement. The indexes of laying interval, number of cluthes laid, number of laying eggs per year, number of unfertilised eggs, number of dead embryos, number of fledgings, number of slaughter pigeons, number of dead pigeons, fertility rate, hatchabilty rate, survival rate, male weight, female weight and body weight at 28 d of four cross combinations were compared. The method of principal component analysis was used to evaluate the hybrid combination comprehensively and to select the excellent combination. The results showed that the laying interval of XY combination was the shortest(25.50 d), and extremely significantly lower than that of LY combination(31.28 d) and LX combination(30.67 d, P<0.01). The number of eggs per year in XY group was the highest(22.69), which was extremely significantly higher than that in LY group(21.28, P<0.01). The fertilization rate of LY group was 88.96%, which was extremely significantly higher than that of XY group(83.51%, P<0.01), and significantly higher than that of XL group(84.57%, P<0.05). The maximum number of young pigeons in XY combination was 13.57. The number of laying nests, the number of laying eggs, the number of unspersed eggs and the number of dead embryos were strongly negatively correlated with the laying interval; the number of laying eggs, the number of unspersed eggs and the number of dead embryos were strongly positively correlated with the number of laying nests, and the weight of squab was strongly positively correlated with the weight of male and female pigeons. The weight of male and female pigeons in XL group was heavier, so the weight of squab in this group was the heaviest(547.65 g). The combination European Meat Pigeon(L)■ × Shifting Pigeon(X)♀ had a low mortality rate, a relatively high number of slaughter and a heavier weight of suckling pigeons at 28 days of age. Three principal components were obtained for reproductive performance, namely egg production factor, number of suckling pigeons factor, and weight of suckling pigeons factor, and the LX egg production factor had a higher score and the LX combination had a higher number of suckling pigeons factor. In conclusion, LX combination was suitable for meat pigeon production. XY combination had high egg production and was suitable for egg production.