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Effect of Alternative Milk Recording Strategies on Genetic Evaluation of Sires of Holstein Friesian Crossbred Cattle

Dhara Panchal, Parineeta Kakati, Rajeshkumar Joshi, Ashish Patel, S. A. Dholariya, D. B. Shah, S. B. Patel, C. T. Patel, Swapnil Gajjar, G. Kishor, Dharamshi Rank.




Abstract

The present study was carried out using total 63,098 first lactation monthly test-day milk yield (TDMY) records of 7,419 crossbred Holstein Friesian (CBHF) animalssired by 209 sires. Datawere collected from Sabarmati Ashram Gaushala (SAG) CBHF Progeny Testing (PT) project under the National Dairy Plan Phase-I for three districts viz. Sabarkantha, Panchmahal and Surat of Gujarat statefrom Information Network for Animal Productivity & Health - Management Information Systemdeveloped by the National Dairy Development Board. Additionally, information on 300 animals and owners/ milkers was collected from 82 villages ofthe same districtsunder SAG PT project to study the error pattern, a farmer may make, while reporting performance of animal. Three factors were found to have significant effect (P

Key words: Test-day Milk Yield, Crossbred Holstein Friesian, Least Squares Analysis, BLUP, RRM, Heritability (h2), AIC, BIC, PSB, Spearman Rank Correlation






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