{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T03:26:14Z","timestamp":1790652374761,"version":"4.1.0"},"reference-count":67,"publisher":"Oxford University Press (OUP)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,2,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>We hypothesized cattle that differed in BW gain had different digestive tract microbiota. Two experiments were conducted. In both experiments, steers received a diet that consisted of 8.0% chopped alfalfa hay, 20% wet distillers grain with solubles, 67.75% dry-rolled corn, and 4.25% vitamin\/mineral mix (including monensin) on a dry matter basis. Steers had ad libitum access to feed and water. In experiment 1, 144 steers (age = 310 \u00b1 1.5 d; BW = 503 \u00b1 37.2 kg) were individually fed for 105 d. Ruminal digesta samples were collected from eight steers with the greatest (1.96 \u00b1 0.02 kg\/d) and eight steers with the least ADG (1.57 \u00b1 0.02 kg\/d) that were within \u00b10.32 SD of the mean (10.1 \u00b1 0.05 kg\/d) dry matter. In experiment 2, 66 steers (age = 396 \u00b1 1 d; BW = 456 \u00b1 5 kg) were individually fed for 84 d. Rumen, duodenum, jejunum, ileum, cecum, and colon digesta samples were collected from eight steers with the greatest (2.39 \u00b1 0.06 kg\/d) and eight steers with the least ADG (1.85 \u00b1 0.06 kg\/d) that were within \u00b10.55 SD of the mean dry matter intake (11.9 \u00b1 0.1 kg\/d). In both studies, DNA was isolated and the V1 to V3 regions of the 16S rRNA gene were sequenced. Operational taxonomic units were classified using 0.03 dissimilarity and identified using the Greengenes 16S rRNA gene database. In experiment 1, there were no differences in the Chao1, Shannon, Simpson, and InvSimpson diversity indexes or the permutation multivariate analysis of variance (PERMANOVA; P = 0.57). The hierarchical test returned six clades as being differentially abundant between steer classifications (P &amp;lt; 0.05). In experiment 2, Chao1, Shannon, Simpson, and InvSimpson diversity indexes and PERMANOVA between steer classified as less or greater ADG did not differ (P &amp;gt; 0.05) for the rumen, duodenum, ileum, cecum, and colon. In the jejunum, there tended to be a difference in the Chao1 (P = 0.09) and Simpson diversity (P = 0.09) indexes between steer classifications, but there was no difference in the Shannon (P = 0.14) and InvSimpson (P = 0.14) diversity indexes. Classification groups for the jejunum differed (P = 0.006) in the PERMANOVA. The hierarchical dependence false discovery rate procedure returned 11 clades as being differentially abundant between steer classifications in the jejunum (P &amp;lt; 0.05). The majority of the OTU were in the Families Corynebacteriaceae and Coriobacteriaceae. This study suggests that intestinal differences in the microbiota of ruminants may be associated with animal performance.<\/jats:p>","DOI":"10.1093\/jas\/skaa008","type":"journal-article","created":{"date-parts":[[2020,1,13]],"date-time":"2020-01-13T00:26:28Z","timestamp":1578875188000},"source":"Crossref","is-referenced-by-count":53,"title":["Digestive tract microbiota of beef cattle that differed in feed efficiency"],"prefix":"10.1093","volume":"98","author":[{"given":"Harvey C","family":"Freetly","sequence":"first","affiliation":[{"name":"U.S. Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, NE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aaron","family":"Dickey","sequence":"first","affiliation":[{"name":"U.S. Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, NE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amanda K","family":"Lindholm-Perry","sequence":"first","affiliation":[{"name":"U.S. Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, NE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard M","family":"Thallman","sequence":"first","affiliation":[{"name":"U.S. Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, NE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John W","family":"Keele","sequence":"first","affiliation":[{"name":"U.S. Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, NE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew P","family":"Foote","sequence":"first","affiliation":[{"name":"U.S. Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, NE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James E","family":"Wells","sequence":"first","affiliation":[{"name":"U.S. Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, NE"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2020,1,13]]},"reference":[{"key":"2020061613532399000_CIT0001","doi-asserted-by":"crossref","first-page":"9743","DOI":"10.1038\/srep09743","article-title":"MICCA: a complete and accurate software for taxonomic profiling of metagenomic data","volume":"5","author":"Albanese","year":"2015","journal-title":"Sci. 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