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Full-Text Articles in Life Sciences
Characterizing Linkage Disequilibrium In Pig Populations, Feng-Xing Du, Archie C. Clutter, Michael M. Lohuis
Characterizing Linkage Disequilibrium In Pig Populations, Feng-Xing Du, Archie C. Clutter, Michael M. Lohuis
Department of Animal Science: Faculty Publications
Knowledge of the extent and range of linkage disequilibrium (LD), defined as non-random association of alleles at two or more loci, in animal populations is extremely valuable in localizing genes affecting quantitative traits, identifying chromosomal regions under selection, studying population history, and characterizing/managing genetic resources and diversity. Two commonly used LD measures, r2 and D’, and their permutation based adjustments, were evaluated using genotypes of more than 6,000 pigs from six commercial lines (two terminal sire lines and four maternal lines) at ~4,500 autosomal SNPs (single nucleotide polymorphisms). The results indicated that permutation only partially removed the dependency of …
Two High-Amylose Maize Starches With Different Amounts Of Resistant Starch Vary In Their Effects On Fermentation, Tissue And Digesta Mass Accretion, And Bacterial Populations In The Large Bowel Of Pigs, Anthony R. Bird, Michelle Vuaran, Ian L. Brown, David L. Topping
Two High-Amylose Maize Starches With Different Amounts Of Resistant Starch Vary In Their Effects On Fermentation, Tissue And Digesta Mass Accretion, And Bacterial Populations In The Large Bowel Of Pigs, Anthony R. Bird, Michelle Vuaran, Ian L. Brown, David L. Topping
Faculty of Health and Behavioural Sciences - Papers (Archive)
Four groups of young pigs (n 6) were fed a diet containing 50 % maize starch as either a highly digestible waxy starch (control; 0 % amylose) or one of three resistant starch (RS) diets, namely a high-amylose maize starch (HAMS; 85 % amylose), this starch subjected to hydrothermal treatment (HTHAMS; 85 % amylose), or a blend of HAMS and HTHAMS included in equal amounts, for 21 d. Food intake and live weight at the end of the study were similar among the four groups. Ileal starch digestibility was lower in pigs fed the three RS diets but was …
Comparative Analysis Of Virulence Genes, Genetic Diversity, And Phylogeny Of Commensal And Enterotoxigenic Escherichia Coli Isolates From Weaned Pigs, Xi-Yang Wu, Toni A. Chapman, Darren J. Trott, Karl A Bettelheim, Thuy N. Do, Steve Driesen, Mark J. Walker, James Chin
Comparative Analysis Of Virulence Genes, Genetic Diversity, And Phylogeny Of Commensal And Enterotoxigenic Escherichia Coli Isolates From Weaned Pigs, Xi-Yang Wu, Toni A. Chapman, Darren J. Trott, Karl A Bettelheim, Thuy N. Do, Steve Driesen, Mark J. Walker, James Chin
Faculty of Science - Papers (Archive)
If the acquisition of virulence genes (VGs) for pathogenicity were not solely acquired through horizontal gene transfers of pathogenicity islands, transposons, and phages, then clonal clusters of enterotoxigenic Escherichia coli (ETEC) would contain few or even none of the VGs found in strains responsible for extraintestinal infections. To evaluate this possibility, 47 postweaning diarrhea (PWD) ETEC strains from different geographical origins and 158 commensal E. coli isolates from the gastrointestinal tracts of eight group-housed healthy pigs were screened for 36 extraintestinal and 18 enteric VGs using multiplex PCR assays. Of 36 extraintestinal VGs, only 8 were detected (fimH, …