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Articles 631 - 639 of 639
Full-Text Articles in Entire DC Network
The Effect Of Varicocele On Semen Quality In Boars Exposed To Heat Stress, Tasha R. Gruhot, Brett White, Benny Mote
The Effect Of Varicocele On Semen Quality In Boars Exposed To Heat Stress, Tasha R. Gruhot, Brett White, Benny Mote
Department of Animal Science: Faculty Publications
Semen quality has a dramatic impact on reproductive efficiency in the swine industry, influencing both conception rate and litter size. The objective of this study was to assess whether the presence of varicocele hinders semen quality in both thermoneutral and heat stress (HS) conditions. At approximately 6 mo of age, ultrasonography was used to measure left and right pampiniform plexus area in order to detect varicocele in maternal line boars at the University of Nebraska–Lincoln. Between 10 and 12 mo of age, semen was collected from each boar (n = 28) twice weekly. Boars were collected under thermoneutral conditions, were …
Formation And Characterization Of Lipid Droplets Of The Bovine Corpus Luteum, Heather A. Talbott, Michele R. Plewes, Crystal Krause, Xiaoying Hou, Pan Zhang, William B. Rizzo, Jennifer R. Wood, Andrea S. Cupp, John S. Davis
Formation And Characterization Of Lipid Droplets Of The Bovine Corpus Luteum, Heather A. Talbott, Michele R. Plewes, Crystal Krause, Xiaoying Hou, Pan Zhang, William B. Rizzo, Jennifer R. Wood, Andrea S. Cupp, John S. Davis
Department of Animal Science: Faculty Publications
Establishment and maintenance of pregnancy depends on progesterone synthesized by luteal tissue in the ovary. Our objective was to identify the characteristics of lipid droplets (LDs) in ovarian steroidogenic cells. We hypothesized that LDs are a major feature of steroidogenic luteal cells and store cholesteryl esters. Whole bovine tissues, isolated ovarian steroidogenic cells (granulosa, theca, small luteal, and large luteal), and isolated luteal LDs were assessed for LD content, LD-associated proteins and lipid analyses. Bovine luteal tissue contained abundant lipid droplets, LD-associated perilipins 2/3/5, hormone-sensitive lipase, and 1-acylglycerol-3-phosphate O-acyltransferase ABHD5. Luteal tissue was enriched in triglycerides (TGs) compared to other …
Asas Celebrates 10 Years Of Publishing Animal Frontiers: The Review Magazine Of Animal Agriculture, Debora L. Hamernik, Meghan Wulster-Radcliffe, Steven A. Zinn
Asas Celebrates 10 Years Of Publishing Animal Frontiers: The Review Magazine Of Animal Agriculture, Debora L. Hamernik, Meghan Wulster-Radcliffe, Steven A. Zinn
Department of Animal Science: Faculty Publications
In July 2011, the first issue of Animal Frontiers was published by an international consortium including the American Society of Animal Science (ASAS), the Canadian Society of Animal Science (CSAS), and the European Federation of Animal Science (EAAP). Development of an international, science-based, open access journal that provided review articles and global perspectives on the complex dynamics associated with the production of animal-sourced foods was an accomplishment in and of itself, but the ability to meet the needs of a diverse community of readers, including scientists, policy makers, educators, and the general public set Animal Frontiers apart from other journals. …
Commercial Genetic Testing For Type 2 Polysaccharide Storage Myopathy And Myofibrillar Myopathy Does Not Correspond To A Histopathological Diagnosis, Stephanie J. Valberg, C. J. Finno, Marisa L. Henry, Melissa Schott, Deborah Velez-Irizarry, Sichong Peng, Erica C. Mckenzie, Jessica L. Petersen
Commercial Genetic Testing For Type 2 Polysaccharide Storage Myopathy And Myofibrillar Myopathy Does Not Correspond To A Histopathological Diagnosis, Stephanie J. Valberg, C. J. Finno, Marisa L. Henry, Melissa Schott, Deborah Velez-Irizarry, Sichong Peng, Erica C. Mckenzie, Jessica L. Petersen
Department of Animal Science: Faculty Publications
Background: Commercial genetic tests for type 2 polysaccharide storage myopathy (PSSM2) and myofibrillar myopathy (MFM) have not been validated by peer-review, and formal regulation of veterinary genetic testing is lacking.
Objectives: To compare genotype and allele frequencies of commercial test variants (P variants) in MYOT (P2; rs1138656462), FLNC (P3a; rs1139799323), FLNC (P3b; rs1142918816) and MYOZ3 (P4; rs1142544043) between Warmblood (WB) and Arabian (AR) horses diagnosed with PSSM2/MFM by muscle histopathology, and phenotyped breed-matched controls. To quantify variant frequency in public repositories of ancient and modern horse breeds.
Study design: Cross sectional using archived clinical material and publicly available data.
Methods: …
Genetic Structure And Admixture In Sheep From Terminal Breeds In The United States, Kimberly M. Davenport, C. Hiemke, Stephanie D. Mc Kay, J. W. Thorne, Ronald M. Lewis, Todd Taylor, B. M. Murdoch
Genetic Structure And Admixture In Sheep From Terminal Breeds In The United States, Kimberly M. Davenport, C. Hiemke, Stephanie D. Mc Kay, J. W. Thorne, Ronald M. Lewis, Todd Taylor, B. M. Murdoch
Department of Animal Science: Faculty Publications
Selection for performance in diverse production settings has resulted in variation across sheep breeds worldwide. Although sheep are an important species to the United States, the current genetic relationship among many terminal sire breeds is not well characterized. Suffolk, Hampshire, Shropshire and Oxford (terminal) and Rambouillet (dual purpose) sheep (n = 248) sampled from different flocks were genotyped using the Applied Biosystems Axiom Ovine Genotyping Array (50K), and additional Shropshire sheep (n = 26) using the Illumina Ovine SNP50 BeadChip. Relationships were investigated by calculating observed heterozygosity, inbreeding coefficients, eigenvalues, pairwise Wright’s FST estimates and an identity by state matrix. …
Impact Of Cow Milk Production On Cow–Calf Performance In The Nebraska Sandhills, Tasha M. King, Jacki A. Musgrave, Richard N. Funston, J. Travis Mulliniks
Impact Of Cow Milk Production On Cow–Calf Performance In The Nebraska Sandhills, Tasha M. King, Jacki A. Musgrave, Richard N. Funston, J. Travis Mulliniks
Department of Animal Science: Faculty Publications
Livestock producers have tended to select for increased output traits like milk production and growth to increase productivity. Even with the increased selection for greater calf growth potential, some regions in the United States have seen a plateau in calf body weight (BW) at weaning (Lalman et al., 2019). When focusing on reaching maximum potential of these output traits, it is important to consider the multitude of variables that affect a production system. With increased milk production, nutrient requirements for cows become increased (Ferrell and Jenkins, 1984; Montaño-Bermudez et al., 1990), which may not be met if range and forage …
Extreme Offspring Ornamentation In American Coots Is Favored By Selection Within Families, Not Benefits To Conspecific Brood Parasites, Bruce E. Lyon, Daizaburo Shizuka
Extreme Offspring Ornamentation In American Coots Is Favored By Selection Within Families, Not Benefits To Conspecific Brood Parasites, Bruce E. Lyon, Daizaburo Shizuka
School of Biological Sciences: Faculty Publications
Offspring ornamentation typically occurs in taxa with parental care, suggesting that selection arising from social interactions between parents and offspring may underlie signal evolution. American coot babies are among the most ornamented offspring found in nature, sporting vividly orange-red natal plumage, a bright red beak, and other red parts around the face and pate. Previous plumage manipulation experiments showed that ornamented plumage is favored by strong parental choice for chicks with more extreme ornamentation but left unresolved the question as to why parents show the preference. Here we explore natural patterns of variation in coot chick plumage color, both within …
Evolutionary Origin And Genetic Diversity Of Ring‐Necked Pheasants In The Upper Midwest United States, Hernán Vázquez-Miranda, Magdalena Jean Olson, Robert M. Zink
Evolutionary Origin And Genetic Diversity Of Ring‐Necked Pheasants In The Upper Midwest United States, Hernán Vázquez-Miranda, Magdalena Jean Olson, Robert M. Zink
School of Biological Sciences: Faculty Publications
We compared mitochondrial cytochrome b sequences of ring‐necked pheasants (Phasianus colchicus) from Midwestern United States (SD and NE, USA) to a molecular phylogeographic hypothesis of pheasants in the native Eurasian range to understand which subspecies are represented by wild and captive released birds. We found that these birds represent 2 Eurasian lineages, which we refer to generally as northern Eurasian (Colchicus group) and eastern China (Torquatus group). These mitochondrial DNA lineages occur in different frequencies in the wild, with the latter being 3 times more common. This suggests that 1) the eastern China lineage is either …
Wpa News 113 (2020), World Pheasant Association
Wpa News 113 (2020), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Winter 2020), number 113
Published by the World Pheasant Association