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Publication
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| Title of Article |
Determining Heat Stress Effects of Multiple Genetic Traits in Tropical Dairy Cattle Using Single-Step Genomic BLUP |
| Date of Acceptance |
2 February 2022 |
| Journal |
| Title of Journal |
Veterinary Sciences |
| Standard |
SCOPUS |
| Institute of Journal |
Molecular Diversity Preservation International (MDPI), Switzerland |
| ISBN/ISSN |
2306-7381 |
| Volume |
2022 |
| Issue |
9 |
| Month |
February |
| Year of Publication |
2022 |
| Page |
1-13 |
| Abstract |
Heat stress is becoming a significant problem in dairy farming, especially in tropical countries, making accurate genetic selection for heat tolerance a priority. This study investigated the effect of heat stress manifestation on genetics for milk yield, milk quality, and dairy health traits with and without genomic information using single-step genomic best linear unbiased prediction (ssGBLUP) and BLUP in Thai-Holstein crossbred. The dataset contained 104,150 test-day records from the first lactation of 15,380 Thai-Holstein crossbred cows. A multiple-trait random regression test-day model on a temperature-humidity index (THI) function was used to estimate genetic parameters and genetic values. Heat stress started at a THI of 76; the heritability estimates ranged from mod-erate to low. The genetic correlation between those traits and heat stress in both BLUP methods was negative. The accuracy of genomic predictions in the ssGBLUP method was higher than the BLUP method. In conclusion, heat stress negatively impacted milk production, increased the so-matic cell score, and disrupted the energy balance. Therefore, in dairy cattle genetic improvement programs, heat tolerance is an important trait. The new genetic evaluation method (ssGBLUP) should replace the traditional method (BLUP) for a more accurate genetic selection. |
| Keyword |
heat tolerance, milk fat-to-protein ratio, milk yield, somatic cell score, Thai-Holstein crossbred |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
false |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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