Polymorphism of Genes Potentially Affecting Growth and Body Size Suggests Genetic Divergence in Wild and Domestic Reindeer () Populations.

: A combination of increased human presence in the Arctic zone alongside climate change has led to a decrease in the number of wild reindeer (). Studying the genetic potential of this species will aid in conservation efforts, while simultaneously promoting improved meat productivity in domestic reindeer. Alongside reducing feed costs, increasing disease resistance, etc.

Genome-Wide Association Study (GWAS) for Left Displaced Abomasum in Highly Productive Russian Holstein Cattle.

Left displaced abomasum (LDA) is a multifactorial disease of cattle that occurs mainly during the transition postpartum period and is characterized by a decrease in milk production and an increased risk of culling. Several studies have been conducted confirming the hereditary nature of predisposition to this disease. The aim of our study is to identify genetic associations characterizing the genomic variability of susceptibility to LDA in Holstein cattle of the Leningrad region of the Russian Federation.

: Updates on egg morphology, host range, and distribution.

During a survey for helminths in reindeer () across the Palearctic region, eggs were found in zoo reindeer feces. These were identified as eggs of based on their morphology, morphometrics, location, and analysis of their partial sequence of ITS rDNA region. Some of the eggs had an appendage, previously unreported.

Assessment of Semen Respiratory Activity of Domesticated Species before and after Cryopreservation: Boars, Bulls, Stallions, Reindeers and Roosters.

To assess sperm quality, it is important to evaluate energy metabolism. The test substance 2.4-dinitrophenol (2.

Genome-wide association study for frozen-thawed sperm motility in stallions across various horse breeds.

Objective: The semen quality of stallions including sperm motility is an important target of selection as it has a high level of individual variability. However, effects of the molecular architecture of the genome on the mechanisms of sperm formation and their preservation after thawing have been poorly investigated. Here, we conducted a genome-wide association study (GWAS) for the sperm motility of cryopreserved semen in stallions of various breeds.

Search for Associations of , , , , and Genes Polymorphisms with Semen Quality in Russian Holstein Bulls (Pilot Study).

The aim of the study was to search for new mutations in the previously studied gene loci of follicle-stimulating hormone receptor (), inhibin α (), inhibin β A (), prolactin (), transition protein 2 (), and sperm flagella 2 () by sequencing, as well as the search for associations of previously identified mutations at these loci with fresh semen quality in Russian Holstein bulls. Phenotypic data from 189 bulls was collected. Data was analyzed for most bulls for three years of semen collection.

Efficiency of Tris-Based Extender Steridyl for Semen Cryopreservation in Stallions.

The fertilizing ability of stallion sperm after freezing is lower than in other species. The search for the optimal extender, combination of extenders, and the freezing protocol is relevant. The aim of this study was to compare lactose-chelate-citrate-yolk (LCCY) extender, usually used in Russia, and Steridyl (Minitube) for freezing sperm of stallions.