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Publication
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| Research Title |
Accuracy of traditional BLUP and Single Step GBLUP on tolerance to heat stress of milk yield trait in Thai Holstein crossbreds dairy cattle |
| Date of Distribution |
1 August 2018 |
| Conference |
| Title of the Conference |
Asian-Australasian Animal Production Congress |
| Organiser |
Malaysian Society of Animal Production (MSAP) |
| Conference Place |
Borneo Convention Centre Kuching |
| Province/State |
Sarawak, Malaysia |
| Conference Date |
1 August 2018 |
| To |
5 August 2018 |
| Proceeding Paper |
| Volume |
18 |
| Issue |
1 |
| Page |
21 |
| Editors/edition/publisher |
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| Abstract |
Heat stress in tropical regions is a major cause that has negative effects on milk production in
dairy cattle, and genetic variation which associated with the amount of lost production. Genetic
selection for dairy heat tolerance is effective technique to improve genetic performance. Genomic
estimated breeding values was used extensively in purebred dairy cattle, and given more accuracy
than conventional breeding. Therefore, the aim of this study was to compare genomic estimated
breeding values (GEBV) and estimated breeding values (EBV) for heat tolerance of milk yield
trait in Thai Holstein crossbred dairy cattle. The model for milk yield included the effects of herd
test day, breeding group, days in milk, age at first calving, and heat stress function which was
estimated for each cow using a random regression test-day model with a common threshold of
temperature-humidity index (THI) = 75 for all cows. Genomic best linear unbiased prediction was
used to calculate EBV and GEBV for heat tolerance of milk yield trait. A total of 155,156 monthly
test-days records for first lactation during year 1993 to 2017 were collected from 22,829 Thai
Holstein crossbred dairy cattle, and reference populations were 789 Thai Holstein crossbred dairy
cattle. The average daily temperature, relative humidity, and THI in Thailand were 27.25 ±
3.13°∁ , 73.57 ± 11.77% , and 77.70 ± 4.52 , respectively. |
| Author |
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| Peer Review Status |
มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Oral |
| Part of thesis |
true |
| Presentation awarding |
false |
| Attach file |
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| Citation |
0
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Journal Publication
ไทย