Episodic release of luteinizing hormone and testosterone in Surti and Marwari bucks younger than one year of age.
Studies on the episodic release of luteinizing hormone (LH) and testosterone in Surti (n=2) and Marwari (n=2) bucks younger than one year of age (6 to 8 months) were carried out by collecting blood plasma during the breeding season. The studies revealed that definite pulsatile releases of LH and testosterone occur in both breeds of bucks. The overall number of LH and testosterone pluses over a 24 hour period was 9.1+/-1.00 and 7.5+/-0.28, respectively. The peak, basal and mean LH and testosterone concentrations did not show significant differences between the two breeds. The duration and interval of LH and testosterone pulses differed during light and dark hours. The time interval between LH peak followed by the testosterone peak was significantly (P<0.05) longer during the night than the day hours for both the breeds. The physiological basis of the findings are discussed.
Patel
D M
DM
Reproductive Biology Research Unit Faculty of Veterinary Science and Animal Husbandry Gujarat Agricultural University Anand 388 110, India.
Mehta
V M
VM
Deshpande
L V
LV
Patel
A V
AV
Nigam
R
R
Shah
R G
RG