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Showing papers by "Indian Agricultural Statistics Research Institute published in 1994"


Journal ArticleDOI
TL;DR: An empirical attempt to study the optimum level of preliminary culling on partial records from two different considerations for both large and small populations finds that even for moderate genetic correlation between partial and complete records, preliminary culls as high as 50% can be effected with advantage.
Abstract: Progeny testing of sires is costly as well as time consuming. The cost and testing time for part sample of sires can be reduced by basing sire evaluation on partial first lactation records. But it results in genetic loss due to decrease in the accuracy of selection. The present paper is an empirical attempt to study the optimum level of preliminary culling on partial records from two different considerations for both large and small populations. It is seen that even for moderate genetic correlation between partial and complete records ( = 0.6) preliminary culling as high as 50% can be effected with advantage.

1 citations


Journal ArticleDOI
TL;DR: A procedure for obtaining the theoretical probability of heritability (h2) estimates from full-sib analysis exceeding unity is described in this article, where probability densities useful in the evaluation of these probabilities are also derived.
Abstract: A procedure for obtaining the theoretical probability of heritability (h2) estimates from full-sib analysis exceeding unity is described. Probability densities useful in the evaluation of these probabilities are also derived. These are used for obtaining the probabilities for several combinations of sire/dam numbers and three levels of h2 (0.10, 0.25, 0.50) assuming additive genetic model and two full-sibs per mating.

1 citations