{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T03:27:04Z","timestamp":1789010824774,"version":"build-2803163510"},"reference-count":22,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2021,1,10]],"date-time":"2021-01-10T00:00:00Z","timestamp":1610236800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2021,1,10]],"date-time":"2021-01-10T00:00:00Z","timestamp":1610236800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["J Animal Sci Biotechnol"],"published-print":{"date-parts":[[2021,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Valine and isoleucine are similar in chemical structure and their limitation in broiler chicken diets. To evaluate their limitation and interactive effects, multivariate assessment nutrition studies for the branched-chain amino acids (BCAA) are needed. A three level (\u2212\u20091, 0, +\u20091), three-factor Box-Behnken design study was conducted to assess dietary BCAA ratios to lysine of 65, 75, and 85 for valine, 58, 66, and 74 for isoleucine, and 110, 130, and 150 for leucine in male and female Lohman Indian River broilers from 22 to 35 d of age.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Live performance of male broilers was not affected by BCAA level. However, male broilers fed increasing isoleucine had improved (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u20090.07) carcass yield as leucine and valine were reduced. Female broilers had improved body weight gain (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u20090.05) and feed conversion (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u20090.003) when leucine and isoleucine were at their lowest levels, independent of valine, but increasing leucine impaired live performance and warranted concomitant increases in isoleucine to restore responses. Increasing dietary isoleucine and valine in female broilers increased breast meat yield (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u20090.05), but increasing leucine tended to diminish the response.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The female Lohman Indian River broiler is more sensitive to BCAA diet manipulation than males. Specifically, as dietary leucine is increased in female broilers, dietary isoleucine increases were needed to offset the negative effects. Both increases in dietary valine and isoleucine improved breast meat yield in female broilers, but only when birds were fed the lowest dietary leucine.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s40104-020-00535-1","type":"journal-article","created":{"date-parts":[[2021,1,10]],"date-time":"2021-01-10T12:02:42Z","timestamp":1610280162000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":33,"title":["Dietary branched-chain amino acid assessment in broilers from 22 to 35\u2009days of age"],"prefix":"10.1186","volume":"12","author":[{"given":"M. T.","family":"Kidd","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F.","family":"Poernama","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"T.","family":"Wibowo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C. W.","family":"Maynard","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S. Y.","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,1,10]]},"reference":[{"key":"535_CR1","doi-asserted-by":"publisher","first-page":"1180","DOI":"10.1093\/jn\/108.7.1180","volume":"108","author":"TK Smith","year":"1978","unstructured":"Smith TK, Austic RE. The branched-chain amino acid antagonism in chicks. 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