{"id":36404,"date":"2023-05-19T12:23:03","date_gmt":"2023-05-19T10:23:03","guid":{"rendered":"https:\/\/www.micropticsl.com\/faq-items\/novel-interpretation-of-sperm-stress-test-and-morphology-for-maturity-assessment-of-young-norwegian-red-bulls\/"},"modified":"2023-05-19T12:23:03","modified_gmt":"2023-05-19T10:23:03","slug":"novel-interpretation-of-sperm-stress-test-and-morphology-for-maturity-assessment-of-young-norwegian-red-bulls","status":"publish","type":"avada_faq","link":"https:\/\/www.micropticsl.com\/es\/faq-items\/novel-interpretation-of-sperm-stress-test-and-morphology-for-maturity-assessment-of-young-norwegian-red-bulls\/","title":{"rendered":"Novel interpretation of sperm stress test and morphology for maturity assessment of young Norwegian Red bulls"},"content":{"rendered":"

Novel interpretation of sperm stress test and morphology for maturity assessment of young Norwegian Red bulls<\/h3>\n

Joanna Bremer, Bj\u00f8rg Heringstad, Jane M. Morrell, Elisabeth Kommisrud<\/p>\n

Department of Applied Ecology, Agricultural Sciences and Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway; <\/em>Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, \u00c5s, Norway; Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden<\/em><\/p>\n

Abstract: <\/strong>The use of genomic selection significantly reduces the age of dairy bulls entering semen production compared to progeny testing. The study aimed to identify early indicators that could be used for screening bulls during their performance testing period and could give us insight into their future semen production performance, acceptance for the AI station, and prediction of their future fertility. The study population consisted of 142 young Norwegian Red bulls enrolled at the performance test station, followed until we received semen production data, semen doses, and, subsequently, non-return rates (NR56) from the AI station. A range of semen quality parameters were measured with computer-assisted sperm analysis and flow cytometry from ejaculates collected from 65 bulls (9\u201313 months). The population morphometry of normal spermatozoa was examined, showing that Norwegian Red bulls at 10 months of age have homogenous sperm morphometry. Norwegian Red bulls could be separated into 3 clusters according to their sperm’s reaction patterns to stress test and cryopreservation. Results of semi-automated morphology assessment of young Norwegian Red bulls showed that 42% of bulls rejected for the AI station and 18% of bulls accepted had ejaculates with abnormal morphology scores. For the youngest age group at 10 months, the mean (SD) proportion of spermatozoa with normal morphology was 77.5% (10.6). Using novel interpretation of sperm stress test combined with sperm morphology analysis and consecutive cryopreservation at a young age allowed identification of the candidate’s sperm quality status. This could help breeding companies introduce young bulls earlier to the AI stations.<\/p>\n

See full article here<\/a><\/p>\n

Animal Reproduction Science – https:\/\/doi.org\/10.1016\/j.anireprosci.2023.107261
\nReceived 8 March 2023, Revised 16 May 2023, Accepted 17 May 2023, Available online 19 May 2023, Version of Record 31 May 2023<\/p>\n","protected":false},"excerpt":{"rendered":"

Novel interpretation of sperm stress test and morphology for maturity assessment of young Norwegian Red bulls Joanna Bremer, Bj\u00f8rg Heringstad, Jane M. Morrell, Elisabeth Kommisrud Department of Applied Ecology, Agricultural Sciences and Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway; Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, […]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"faq_category":[148,157],"class_list":["post-36404","avada_faq","type-avada_faq","status-publish","format-standard","hentry","faq_category-animal-es","faq_category-bull-es"],"yoast_head":"\nNovel interpretation of sperm stress test and morphology for maturity assessment of young Norwegian Red bulls - HT CASA<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.micropticsl.com\/es\/faq-items\/novel-interpretation-of-sperm-stress-test-and-morphology-for-maturity-assessment-of-young-norwegian-red-bulls\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Novel interpretation of sperm stress test and morphology for maturity assessment of young Norwegian Red bulls - HT CASA\" \/>\n<meta property=\"og:description\" content=\"Novel interpretation of sperm stress test and morphology for maturity assessment of young Norwegian Red bulls Joanna Bremer, Bj\u00f8rg Heringstad, Jane M. 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