Trend Analysis on Milk production Traits in the Dairy Farming Promotion Organization of Thailand

Authors

  • Sanao Katkasame Beef and Dairy Cattle Breeding Research and Development in the Tropics, Department of Animal Science, Kasetsart University, Bangkok 10900, Thailand
  • Sornthep Tumwasorn Beef and Dairy Cattle Breeding Research and Development in the Tropics, Department of Animal Science, Kasetsart University, Bangkok 10900, Thailand.
  • Bandhit Thanindratarn Beef and Dairy Cattle Breeding Research and Development in the Tropics, Department of Animal Science, Kasetsart University, Bangkok 10900, Thailand.
  • Somkiert Pasanpanich Dairy Farming Promotion Organization of Thailand, Muag Lek, Saraburi 18180, Thailand.

Keywords:

trend analysis, dairy cattle, milk yield

Abstract

A total of 976 first lactation records from Dairy Farming Promotion Organization of Thailand during the years 1972 to 1991 were used to evaluate phenotypic trend and genetic trend on sire contributions. All records were analyzed to obtain the solutions from solving the fixed and mixed model equations. Year of sire birth was considered to provide genetic grouping based on sire contributions. By regressing year of calf solutions on time, estimates of phenotypic changes were obtained. Genetic trend based on sire contribution were obtained by regressing year of sire birth solution on time. The phenotypic trends per year on milk yield, milk fat and fat percentage were found to be 35.98 kg, 1.2589 kg and -0.0104%, respectively. Genetic trend based on sire contribution for three traits were 45.05 kg, 0.448 kg and -0.0544% per year, respectively.

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Published

1996-06-30

How to Cite

Sanao Katkasame, Sornthep Tumwasorn, Bandhit Thanindratarn, and Somkiert Pasanpanich. 1996. “Trend Analysis on Milk Production Traits in the Dairy Farming Promotion Organization of Thailand”. Agriculture and Natural Resources 30 (2). Bangkok, Thailand:211-19. https://li01.tci-thaijo.org/index.php/anres/article/view/241149.

Issue

Vol. 30 No. 2 (1996): April-June

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.