Ovulation rate, antral follicle count, and circulating anti-Müllerian hormone in Trio allele carriers, a novel high fecundity bovine genotype

High fecundity genotypes in sheep are a valuable model to study the physiological mechanisms underlying follicle selection and the control of ovulation rate. Similar genotypes in cattle had not been described until the recent identification of a major bovine allele, termed Trio, which had a large ef...

Full description

Saved in:
Bibliographic Details
Published in:Theriogenology 2017-10, Vol.101, p.81-90
Main Authors: García-Guerra, Alvaro, Motta, Jéssica C.L., Melo, Leonardo F., Kirkpatrick, Brian W., Wiltbank, Milo C.
Format: Article
Language:English
Subjects:
Alleles
AMH
Animals
Anti-Mullerian Hormone - blood
Antral follicle count
Cattle - genetics
Female
Fertility - genetics
Follicle Stimulating Hormone - pharmacology
Genotype
High fecundity
Ovarian Follicle - anatomy & histology
Ovulation
Ovulation - drug effects
Ovulation - genetics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:High fecundity genotypes in sheep are a valuable model to study the physiological mechanisms underlying follicle selection and the control of ovulation rate. Similar genotypes in cattle had not been described until the recent identification of a major bovine allele, termed Trio, which had a large effect on ovulation rate. The present study was designed to evaluate ovulation rate, antral follicle count (AFC), circulating ant-müllerian hormone (AMH), and the association among these measures in unstimulated and superstimulated Trio carrier cattle. We hypothesized that AFC and AMH would be variable among individual cows but would be similar between Trio carriers and non-carrier control cows and that there would be no association between these measures of follicle numbers and ovulation rate. In experiment 1, ovulation rate was determined during 4 consecutive estrous cycles in Trio carriers (n = 34) and non-carrier controls (n = 27). Ovulation rate, on average, was greater (P  0.70, respectively). In Experiment 3, circulating AMH was also not different between genotypes (P = 0.65) while correlations were found between AFC and AMH in Trio carriers (r = 0.43; P = 0.05; n = 27) and non-carrier controls (r = 0.78; P 
ISSN:0093-691X
1879-3231
DOI:10.1016/j.theriogenology.2017.05.026