Birsa Agricultural University, Ranchi

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Studies on the construction of Selection indices on Broiler Birds
(Birsa Agricultural University, Ranchi, 1984) Akhtar, S.M. Humayun; Mishra, H.R.
The investigation reported in this thesis van based upon the experiments conducted on 833 Red Cornish and 1,792 shite Rock birds (belonging to 44 and 05 siren respectively) procured from Central Avian Research Institute, Izatnagar and subsequently maintained at the Experimental poultry Unit et Ranchi Veterinary College, Ranchi, and vas planned with the following objectives: 1. To estimate the genetic and phenotypic architecture with respect to broiler and production traits of the two above mentioned breeds. 2. To construct several selection indicens separately for male and female lines involving some economic traits. 3.To estimate responses in the constituent traits and also in aggregate genetic economic value in each case consequent upon one round of index selection. 4.To compare the efficiency of the tandem, independent culling level and index selections. 5.To construct restricted selection indices imposing restriction on one or two traits at a time and to estimate the genetic cost of imposing restriction in each case. 6.To construct selection indices for multi-stage indox selection and to evaluate their efficiencies.