Abstract:Data on 1809 records of productive and reproductive traits in Black Pied cows were studied to determined the performance of these cows under hot-climate conditions in Uzbekistan Republic during the first three lactations and to analyze some genetic and environmental factors affecting these traits. The random effects studied were sire and dam within sire. The fixed effects were season of calving/birth (winter from October to March and summer from April to September), year of calving (1971 to 1983)/birth (1968 … Show more
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