Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/68183
Title: Associations among thermal biology, preovulatory follicle diameter, follicular and luteal vascularities, and sex steroid hormone concentrations during preovulatory and postovulatory periods in tropical beef cows
Authors: Jakree Jitjumnong
Tossapol Moonmanee
Paiwan Sudwan
Raktham Mektrirat
Maslin Osathanunkul
Chainarong Navanukraw
Julakorn Panatuk
Punnawut Yama
Wilasinee Pirokad
Warittha U-krit
Warunya Chaikol
Keywords: Agricultural and Biological Sciences
Biochemistry, Genetics and Molecular Biology
Veterinary
Issue Date: 1-Feb-2020
Abstract: © 2020 Elsevier B.V. The objectives were to evaluate effects of tropical seasons on thermal biology, preovulatory follicle (POF) diameter, POF and luteal vascularities, and estradiol (E2) and progesterone (P4) concentrations; and to determine the associations among the values for these variables during preovulatory and postovulatory periods in Thai native cows in tropical climates: cold, hot, and rainy seasons. Development and vascularity of the POF and corpora lutea (CL) were evaluated using color Doppler ultrasonography. The temperature-humidity index (THI) was greater when the preovulatory period occurred during the rainy season when compared with the occurrence during the hot and cold seasons of the year. Furthermore, POF diameter was less when the THI was greater. The THI was greater when the postovulatory period occurred during the rainy season when compared to the occurrence of the postovulatory period during the hot and cold seasons of the year. Furthermore, the CL vascularity and P4 concentration were less when the THI was greater. The THI was inversely correlated with CL vascularity and P4 concentrations. When the THI was greatest during the hot and rainy seasons of the year, there were the greatest negative effects on POF size, POF and CL blood flow, and concentrations of E2 and P4 during the preovulatory and postovulatory periods. While native Bos indicus are capable of adapting to tropical conditions, there are still negative effects, such as impaired POF and CL functions, when the THI induces heat stress.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85077912793&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/68183
ISSN: 03784320
Appears in Collections:CMUL: Journal Articles

Files in This Item:
There are no files associated with this item.


Items in CMUIR are protected by copyright, with all rights reserved, unless otherwise indicated.