Artificial insemination AI is the preferred method for reproduction in the majority of the intensive pig production systems Worldwide. To this end, fresh extended ready-to-use semen doses are either purchased from AI-centres or produced by boars kept on-farm. For profitable semen production, it is necessary to obtain a maximum amount of high quality semen from each boar. This paper reviews current knowledge on factors that may affect semen quality by influencing the boar or the semen during processing. Genetic markers could be used for early detection of boars with the highest fertility potential.
Cytogenetic location: 17q QRICH2 plays an essential role in sperm flagellar development by stabilizing and enhancing expression of proteins involved in flagellar development Shen et al. Shen et al. It has a glutenin high molecular weight superfamily domain in its N-terminal half, and overlapping structural maintenance of chromosomes SMC; see -N superfamily and DUF domains in its C-terminal half. QRICH2 is highly conserved in evolution, and orthologs are present in many mammals. Stochastic optical reconstruction microscopy STORM of human spermatozoa showed a continuous distribution of QRICH2 along sperm flagella and colocalization with alpha-tubulin see , an axonemal component. Immunofluorescence analysis in mice revealed that Qrich2 localized to the nuclear membrane of spermatogonia, nucleus of round spermatids, nucleus and cytoplasm of early elongating spermatids, cytoplasm of late elongating spermatids, and flagella of epididymal spermatozoa.
Abstract Objective: The aim of this study was to evaluate the effect of glutamine addition to the tris-extender on the quality of cryopreserved buffalo spermatozoa and subsequent fertility. Methodology: Semen ejaculates from six clinically normal and sexual mature Egyptian buffalo bulls were collected once weekly and pooled. The extended semen was packed into 0. Semen samples were cooled and equilibrated before cryopreservation.