Performance of certain purebreds and crossbreds for broiler traits
By: Leo Joseph.
Contributor(s): Ramakrishnan A (Guide).
Material type:
BookPublisher: Mannuthy Department of Poultry science, College of Veterinary and Animal Science 1979DDC classification: 636.5 Online resources: Click here to access online Dissertation note: MVSc Abstract: An experiment was conducted to compare Australorps, (ALP), Rhode Island Red (RIR) and White Plymouth Rock (WPR) breeds of chicken and their crosses for broiler production. All the nine possible combinations of these breeds were taken, the genetic groups being three purebred and crossbreds. There were twenty chicks for each group and a total of 180 chicks. They were raised upto twelve weeks of age on deep better identical conditions of management. Body weight was recorded at ten and twelve weeks of age. Feed efficiency and genetic effects – General combining ability, Specific combining ability and Reciprocal effects on body weight-were also calculated at ten weeks of age. Slaughter studies were conducted at ten and twelve weeks of age.
The results of the study tend to suggest that among the three breeds studied, WPR was the best for broiler production. The other two breeds, ALP and RIR are not beneficial for broiler production since the performance of those breeds, the crosses between them and also their crosses with WPR were not satisfactory for the traits studied.
The statistically significant GCA effect for tenth week body weight observed in WPR indicate that purebred selection scheme could be used for further refinement in body weight in WPR. The significant SCA effect observed for tenth week body weight in ALP and RIR suggest the use of crossbred selection schemes for improving body weights in these two breeds.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
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KAU Central Library, Thrissur Theses | 636.5 LEO/PE (Browse shelf) | Available | 170062 |
MVSc
An experiment was conducted to compare Australorps, (ALP), Rhode Island Red (RIR) and White Plymouth Rock (WPR) breeds of chicken and their crosses for broiler production. All the nine possible combinations of these breeds were taken, the genetic groups being three purebred and crossbreds. There were twenty chicks for each group and a total of 180 chicks. They were raised upto twelve weeks of age on deep better identical conditions of management. Body weight was recorded at ten and twelve weeks of age. Feed efficiency and genetic effects – General combining ability, Specific combining ability and Reciprocal effects on body weight-were also calculated at ten weeks of age. Slaughter studies were conducted at ten and twelve weeks of age.
The results of the study tend to suggest that among the three breeds studied, WPR was the best for broiler production. The other two breeds, ALP and RIR are not beneficial for broiler production since the performance of those breeds, the crosses between them and also their crosses with WPR were not satisfactory for the traits studied.
The statistically significant GCA effect for tenth week body weight observed in WPR indicate that purebred selection scheme could be used for further refinement in body weight in WPR. The significant SCA effect observed for tenth week body weight in ALP and RIR suggest the use of crossbred selection schemes for improving body weights in these two breeds.
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