Poultry Science · 1962 · 11 citations · 2 references
AgricultureAnimal SciencesPoultry ScienceBroiler ProductionPoultry BreedingPoultry GeneticsBroiler BreedingBroiler Growth PerformanceBroiler Production EconomicsGenetic EvaluationPoultry ProductionReproductive PerformanceBroiler Breeder PerformanceBroiler ChickensBroiler HatchabilityFeed Efficiency TraitsNet Income MeasurementParent Stock Reproductive PerformanceProgeny Performance AnalysisReproductive Performance Traits
THE HIGH LEVEL of efficiency of broiler producers today is the result breeding practices. In the main, this improvement has been effected in the broiler progeny, not in the performance of the parent stock. Yet costs in a broiler enterprise are determined, not only by the efficiency of broiler progeny, but also by the performance of the parent flock, particularly its rate of egg production, feed efficiency and hatchability. Specific knowledge concerning the relative importance of parent and progeny performance determining profitability of a strain or cross seems to be lacking. Strain and Nordskog (1962) concluded that broiler weight and broiler feed conversion were the most important factors determining net income in the Maine Random Sample Broiler tests. Egg production in the parent flock was of little importance. Nordskog (1960), using egg laying test data, found that egg production was the most important single factor affecting income. However, both of …
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A DISCRIMINANT FUNCTION FOR PLANT SELECTION
Holly Smith · Annals of Eugenics · 1936 · 957 citations