New polymorphisms at MTNR1A gene and their association with reproductive resumption in sarda breed sheep.

The aim of this study was to characterize the MTNR1A locus in Sarda sheep breed, in order to identify potential single nucleotide polymorphisms (SNPs) associated with reproductive resumption. The reproductive performance of 200 lactating ewes, aged 3-5 years, with body condition score (BCS) 2.5-4.

Reproductive response to male joining with ewes with different allelic variants of the MTNR1A gene.

The aims were to evaluate the reproductive response to ram placement with Sarda ewes with different allelic variants at position g.15099485 A > G of the MTNR1 A gene. Ram placements occurred between the early and late spring and there was analysis of whether this polymorphism is associated with other nucleotide substitutions.

Melatonin treatment in winter and spring and reproductive recovery in Sarda breed sheep.

This study aimed to evaluate the effect of melatonin treatment carried out between late winter and early spring on reproductive response in Sarda breed sheep and whether the photo-refractoriness can influence this reproductive response. The study was conducted on 3200 adult ewes, aged 3-6years old, with body condition score (BCS) 2.5-4.