{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T16:23:58Z","timestamp":1759940638000,"version":"3.41.2"},"reference-count":48,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2020,10,27]],"date-time":"2020-10-27T00:00:00Z","timestamp":1603756800000},"content-version":"vor","delay-in-days":26,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/100007235","name":"Colorado State University","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100007235","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,10,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>The All Heifer, No Cow (AHNC) beef production system is an alternative to conventional cow\/calf production that involves insemination of nulliparous heifers with sexed semen to produce female calves that are early weaned at 3 mo of age. Dams are finished on a high-concentrate diet and harvested before reaching 30 mo of age. Objectives of this research were to document reproductive, feedyard, calf, and carcass performance of an AHNC herd; evaluate effects of carcass maturity on carcass quality; and determine if performance of initial cohorts (i.e., cohorts 1 and 2) differed from sustaining cohorts (i.e., cohorts 3\u20135). A total of 272 heifers were enrolled in the AHNC system via five annual cohorts. The system was initiated with 51 yearling, Angus-based heifers, and a replicate set (n = 56) was started 12 mo after. Heifers in cohorts 3 (n = 53), 4 (n = 56), and 5 (n = 56) were primarily offspring of prior cohorts (i.e., cohort 3 heifers born to cohort 1 females), but some were purchased to maintain inventory. Angus replacement heifers were purchased in cohorts 3 (n = 26), 4 (n = 26), and 5 (n = 28). Mean (\u00b1standard deviation) pregnancy rate at 30 d after fixed-time artificial insemination (AI) with sexed semen was 50.8% \u00b1 9.4%, and 140-d pregnancy rate was 93.0% \u00b1 1.5%. With AHNC, 61.0% \u00b1 6.5% of females replaced themselves with a heifer. During finishing, average daily gain (ADG) was 1.9 \u00b1 0.4 kg \u2022 d\u22121 and dry matter intake (DMI) was 14.9 \u00b1 1.9 kg \u2022 d\u22121. Hot carcass weight (HCW) was 367 \u00b1 35 kg. The USDA grading system classified 20.5% of all carcasses (n = 220) as C maturity (A00 = 100, B00 = 200, etc.), 62.4% \u00b1 29.1% of carcasses as USDA Choice. USDA yield grade (YG) was 2.6 \u00b1 0.7. Based on cohorts 1 and 2, there were no differences (P = 0.96) in Warner\u2013Bratzler shear force values between A and B maturity vs. C maturity carcasses. Across all cohorts, there were no differences in USDA YG, marbling score (MA), and lean maturity between A and B maturity vs. C maturity carcasses; there were differences in age (P &amp;lt; 0.001), bone maturity (P &amp;lt; 0.001), and overall maturity (P &amp;lt;0.001). A comparison of initial vs. sustaining cohorts showed that initial cohorts had lower (P &amp;lt; 0.001) DMI, heavier (P &amp;lt; 0.001) HCW, and more advanced (P &amp;lt; 0.05) bone maturity. However, there were no differences for 30- and 140-d pregnancy rates, ADG, USDA YG, and MA between initial and sustaining cohorts. The AHNC beef production system can effectively produce female calves and quality carcasses for harvest.<\/jats:p>","DOI":"10.1093\/tas\/txaa191","type":"journal-article","created":{"date-parts":[[2020,10,27]],"date-time":"2020-10-27T07:52:30Z","timestamp":1603785150000},"source":"Crossref","is-referenced-by-count":2,"title":["Evaluation of performance and carcass traits for a five-cohort All Heifer, No Cow beef production system demonstration herd"],"prefix":"10.1093","volume":"4","author":[{"given":"Meredith A","family":"Harrison","sequence":"first","affiliation":[{"name":"Department of Animal Sciences, Colorado State University, Fort Collins, CO"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jose A","family":"Arce-Cordero","sequence":"additional","affiliation":[{"name":"Department of Animal Sciences, Colorado State University, Fort Collins, CO"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"suffix":"Jr","given":"George E","family":"Seidel","sequence":"additional","affiliation":[{"name":"Department of Biomedical Sciences, Colorado State University, Fort Collins, CO"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shawn L","family":"Archibeque","sequence":"additional","affiliation":[{"name":"Department of Animal Sciences, Colorado State University, Fort Collins, CO"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jack C","family":"Whittier","sequence":"additional","affiliation":[{"name":"Department of Animal Sciences, Colorado State University, Fort Collins, CO"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ryan D","family":"Rhoades","sequence":"additional","affiliation":[{"name":"Department of Animal Sciences, Colorado State University, Fort Collins, CO"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jason K","family":"Ahola","sequence":"additional","affiliation":[{"name":"Department of Animal Sciences, Colorado State University, Fort Collins, CO"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2020,10,27]]},"reference":[{"key":"2020122906300592900_CIT0001","doi-asserted-by":"crossref","first-page":"1792","DOI":"10.2527\/jas.2013-7553","article-title":"Effects of USDA carcass maturity on sensory attributes of beef produced by grain-finished steers and heifers classified as less than 30 months old using dentition","volume":"92","author":"Acheson","year":"2014","journal-title":"J. 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