Relationship of the Temperature-Humidity Index (THI) with Ovarian Responses and Embryo Production in Superovulated Thai-Holstein Crossbreds under Tropical Climate Conditions
Heat stress strongly negatively affects reproductive traits in dairy cattle. The purpose of the present study was to investigate the effect of heat stress in superstimulated Thai-Holstein crossbreds under tropical climate conditions. Data included 75 records from 12 superovulated Thai-Holstein cross...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Veterinary Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2306-7381/8/11/270 |
| _version_ | 1797508272347938816 |
|---|---|
| author | Ruthaiporn Ratchamak Thanaporn Ratsiri Rujira Chumchai Wuttigrai Boonkum Vibuntita Chankitisakul |
| author_facet | Ruthaiporn Ratchamak Thanaporn Ratsiri Rujira Chumchai Wuttigrai Boonkum Vibuntita Chankitisakul |
| author_sort | Ruthaiporn Ratchamak |
| collection | DOAJ |
| description | Heat stress strongly negatively affects reproductive traits in dairy cattle. The purpose of the present study was to investigate the effect of heat stress in superstimulated Thai-Holstein crossbreds under tropical climate conditions. Data included 75 records from 12 superovulated Thai-Holstein crossbreds between 2018 and 2020. Cows were superstimulated with conventional treatment. The mean temperature-humidity index (THI) was evaluated for three data collection periods: during the 9, 21 and 42-day periods before the insemination day to determine the period in which THI mostly affected superstimulation responses. The THI levels/thresholds were determined and interpreted together with the superovulatory response. A significantly negative correlation was obtained for the THI during the period 9 days before insemination. Negative effects on the number of large follicles and corpora lutea began at a THI of 72 and were apparently severe after a THI of 77, similar to the ovulation rate, fertilized ova and transferable embryos (<i>p</i> < 0.05). Meanwhile, more degenerated embryos were found with THI values (<i>p</i> < 0.05). The superovulatory response in Thai-Holstein crossbreds under tropical climate conditions is highly affected by heat stress starting at a THI of 72 and becomes more severe at a THI higher than 77. |
| first_indexed | 2024-03-10T04:59:36Z |
| format | Article |
| id | doaj.art-de072629fc864837a63c7a61806fea80 |
| institution | Directory Open Access Journal |
| issn | 2306-7381 |
| language | English |
| last_indexed | 2024-03-10T04:59:36Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Veterinary Sciences |
| spelling | doaj.art-de072629fc864837a63c7a61806fea802023-11-23T01:54:34ZengMDPI AGVeterinary Sciences2306-73812021-11-0181127010.3390/vetsci8110270Relationship of the Temperature-Humidity Index (THI) with Ovarian Responses and Embryo Production in Superovulated Thai-Holstein Crossbreds under Tropical Climate ConditionsRuthaiporn Ratchamak0Thanaporn Ratsiri1Rujira Chumchai2Wuttigrai Boonkum3Vibuntita Chankitisakul4Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, ThailandDepartment of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, ThailandDepartment of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, ThailandDepartment of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, ThailandDepartment of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, ThailandHeat stress strongly negatively affects reproductive traits in dairy cattle. The purpose of the present study was to investigate the effect of heat stress in superstimulated Thai-Holstein crossbreds under tropical climate conditions. Data included 75 records from 12 superovulated Thai-Holstein crossbreds between 2018 and 2020. Cows were superstimulated with conventional treatment. The mean temperature-humidity index (THI) was evaluated for three data collection periods: during the 9, 21 and 42-day periods before the insemination day to determine the period in which THI mostly affected superstimulation responses. The THI levels/thresholds were determined and interpreted together with the superovulatory response. A significantly negative correlation was obtained for the THI during the period 9 days before insemination. Negative effects on the number of large follicles and corpora lutea began at a THI of 72 and were apparently severe after a THI of 77, similar to the ovulation rate, fertilized ova and transferable embryos (<i>p</i> < 0.05). Meanwhile, more degenerated embryos were found with THI values (<i>p</i> < 0.05). The superovulatory response in Thai-Holstein crossbreds under tropical climate conditions is highly affected by heat stress starting at a THI of 72 and becomes more severe at a THI higher than 77.https://www.mdpi.com/2306-7381/8/11/270heat stresssuperovulationthreshold point |
| spellingShingle | Ruthaiporn Ratchamak Thanaporn Ratsiri Rujira Chumchai Wuttigrai Boonkum Vibuntita Chankitisakul Relationship of the Temperature-Humidity Index (THI) with Ovarian Responses and Embryo Production in Superovulated Thai-Holstein Crossbreds under Tropical Climate Conditions Veterinary Sciences heat stress superovulation threshold point |
| title | Relationship of the Temperature-Humidity Index (THI) with Ovarian Responses and Embryo Production in Superovulated Thai-Holstein Crossbreds under Tropical Climate Conditions |
| title_full | Relationship of the Temperature-Humidity Index (THI) with Ovarian Responses and Embryo Production in Superovulated Thai-Holstein Crossbreds under Tropical Climate Conditions |
| title_fullStr | Relationship of the Temperature-Humidity Index (THI) with Ovarian Responses and Embryo Production in Superovulated Thai-Holstein Crossbreds under Tropical Climate Conditions |
| title_full_unstemmed | Relationship of the Temperature-Humidity Index (THI) with Ovarian Responses and Embryo Production in Superovulated Thai-Holstein Crossbreds under Tropical Climate Conditions |
| title_short | Relationship of the Temperature-Humidity Index (THI) with Ovarian Responses and Embryo Production in Superovulated Thai-Holstein Crossbreds under Tropical Climate Conditions |
| title_sort | relationship of the temperature humidity index thi with ovarian responses and embryo production in superovulated thai holstein crossbreds under tropical climate conditions |
| topic | heat stress superovulation threshold point |
| url | https://www.mdpi.com/2306-7381/8/11/270 |
| work_keys_str_mv | AT ruthaipornratchamak relationshipofthetemperaturehumidityindexthiwithovarianresponsesandembryoproductioninsuperovulatedthaiholsteincrossbredsundertropicalclimateconditions AT thanapornratsiri relationshipofthetemperaturehumidityindexthiwithovarianresponsesandembryoproductioninsuperovulatedthaiholsteincrossbredsundertropicalclimateconditions AT rujirachumchai relationshipofthetemperaturehumidityindexthiwithovarianresponsesandembryoproductioninsuperovulatedthaiholsteincrossbredsundertropicalclimateconditions AT wuttigraiboonkum relationshipofthetemperaturehumidityindexthiwithovarianresponsesandembryoproductioninsuperovulatedthaiholsteincrossbredsundertropicalclimateconditions AT vibuntitachankitisakul relationshipofthetemperaturehumidityindexthiwithovarianresponsesandembryoproductioninsuperovulatedthaiholsteincrossbredsundertropicalclimateconditions |