Efecto de la esquila a los 50 días de gestación sobre la condición corporal, concentración de ácidos grasos no esterificados en plasma de la oveja y peso vivo de los corderos al nacimiento.
Ovarian follicular dynamics and endocrine profiles in Polwarth ewes with high and low body condition.
In this investigation we tested the hypothesis that static body condition (BC) of the ewe affects oestradiol and FSH with implications for subsequent follicular growth and turn-over. Sixteen Polwarth ewes were selected from a flock according to their BC score (scale:1 emaciated; 5 obese). High BC (HBC) ewes (no. = 8) had a BC score of 4.1 (s.e. 0.1) and low BC (LBC) ewes (no. = 8) had a BC score of 1.9 (s.e. 0.1). Daily ultrasound examinations were performed and blood samples for progesterone, oestradiol and follicle-stimulating hormone (FSH) determination were collected.
Genomic variation and population structure detected by single nucleotide polymorphism arrays in Corriedale, Merino and Creole sheep.
ABSTRACT. The aim of this study was to investigate the genetic diversity within and among three breeds of sheep:Corriedale, Merino and Creole. Sheep from the three breeds (Merino n = 110, Corriedale n = 108 and Creole n = 10) were genotyped using the Illumina Ovine SNP50 beadchip® . Genetic diversity was evaluated by comparing the minor allele frequency (MAF) among breeds. Population structure and genetic differentiation were assessed using STRUCTURE software, principal component analysis (PCA) and fixation index (FST).