Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows

Detalhes bibliográficos
Autor(a) principal: Schubach, Kelsey M
Data de Publicação: 2019
Outros Autores: Cooke, Reinaldo F, Brandão, Alice P, Schumaher, Thiago F [UNESP], Pohler, Ky G, Bohnert, David W, Marques, Rodrigo S
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1093/jas/skz262
http://hdl.handle.net/11449/197980
Resumo: This experiment evaluated the effects of postweaning body weight (BW) gain of replacement beef heifers on their reproductive development and productivity as primiparous cows. Seventy-Two Angus × Hereford heifers were ranked on day-6 of experiment (17 d after weaning) by age and BW (218 ± 1.6 d of age and 234 ± 3 kg of BW), and assigned to receive 1 of 3 supplementation programs from days 0 to 182: 1) no supplementation to maintain limited BW gain (LGAIN), 2) supplementation to promote moderate BW gain (MGAIN), or 3) supplementation to promote elevated BW gain (HGAIN). Heifers were maintained in 2 pastures (36 heifers/pasture, 12 heifers/treatment in each pasture) with free-choice alfalfa-grass hay, and supplements were offered individually 6 d per week. Heifer shrunk BW was recorded on days-6 and 183 for average daily gain (ADG) calculation. Blood samples were collected for puberty evaluation via plasma progesterone weekly from days 0 to 182. On day 183, heifers were combined into a single group and received the same nutritional management until the end of the experimental period (day 718). From days 183 to 253, heifers were assigned to a fixed-Time artificial insemination program combined with natural service. Average daily gain from days 0 to 182 was greater (P < 0.01) in HGAIN vs. MGAIN and LGAIN (0.78, 0.60, and 0.37 kg/d, respectively; SEM = 0.02), and greater (P < 0.01) in MGAIN vs. LGAIN heifers. Puberty attainment by the beginning of the breeding season was also greater in HGAIN vs. MGAIN and LGAIN (87.5%, 62.5%, and 56.5%, respectively; SEM = 7.1) but similar (P = 0.68) between MGAIN vs. LGAIN heifers. A treatment × day interaction was detected (P < 0.01) for calving rate, as HGAIN heifers calved earlier compared with MGAIN and LGAIN heifers. Ten heifers per treatment were assessed for milk production via weigh-suckle-weigh at 56.8 ± 1.5 d postpartum, followed by milk sample collection 24 h later. No treatment differences were detected (P ≥ 0.16) for milk yield and composition. However, mRNA expression of GLUT1 in milk fat globules was less (P ≤ 0.02) in LGAIN vs. MGAIN and HGAIN heifers, and expression of GLUT8 mRNA was also less (P = 0.04) in LGAIN vs. HGAIN heifers. No treatment differences were detected (P ≥ 0.44) for offspring weaning BW. Collectively, results from this experiment indicate that HGAIN hastened the reproductive development of replacement heifers, without negatively affecting their milk productivity and offspring weaning weight as primiparous cows.
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spelling Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cowsbeef heifersgrowthlactationpubertysupplementationThis experiment evaluated the effects of postweaning body weight (BW) gain of replacement beef heifers on their reproductive development and productivity as primiparous cows. Seventy-Two Angus × Hereford heifers were ranked on day-6 of experiment (17 d after weaning) by age and BW (218 ± 1.6 d of age and 234 ± 3 kg of BW), and assigned to receive 1 of 3 supplementation programs from days 0 to 182: 1) no supplementation to maintain limited BW gain (LGAIN), 2) supplementation to promote moderate BW gain (MGAIN), or 3) supplementation to promote elevated BW gain (HGAIN). Heifers were maintained in 2 pastures (36 heifers/pasture, 12 heifers/treatment in each pasture) with free-choice alfalfa-grass hay, and supplements were offered individually 6 d per week. Heifer shrunk BW was recorded on days-6 and 183 for average daily gain (ADG) calculation. Blood samples were collected for puberty evaluation via plasma progesterone weekly from days 0 to 182. On day 183, heifers were combined into a single group and received the same nutritional management until the end of the experimental period (day 718). From days 183 to 253, heifers were assigned to a fixed-Time artificial insemination program combined with natural service. Average daily gain from days 0 to 182 was greater (P < 0.01) in HGAIN vs. MGAIN and LGAIN (0.78, 0.60, and 0.37 kg/d, respectively; SEM = 0.02), and greater (P < 0.01) in MGAIN vs. LGAIN heifers. Puberty attainment by the beginning of the breeding season was also greater in HGAIN vs. MGAIN and LGAIN (87.5%, 62.5%, and 56.5%, respectively; SEM = 7.1) but similar (P = 0.68) between MGAIN vs. LGAIN heifers. A treatment × day interaction was detected (P < 0.01) for calving rate, as HGAIN heifers calved earlier compared with MGAIN and LGAIN heifers. Ten heifers per treatment were assessed for milk production via weigh-suckle-weigh at 56.8 ± 1.5 d postpartum, followed by milk sample collection 24 h later. No treatment differences were detected (P ≥ 0.16) for milk yield and composition. However, mRNA expression of GLUT1 in milk fat globules was less (P ≤ 0.02) in LGAIN vs. MGAIN and HGAIN heifers, and expression of GLUT8 mRNA was also less (P = 0.04) in LGAIN vs. HGAIN heifers. No treatment differences were detected (P ≥ 0.44) for offspring weaning BW. Collectively, results from this experiment indicate that HGAIN hastened the reproductive development of replacement heifers, without negatively affecting their milk productivity and offspring weaning weight as primiparous cows.Department of Animal Science-Texas AandM UniversitySão Paulo State University (UNESP) School of Veterinary Medicine and Animal ScienceEastern Oregon Agricultural Research Center-Oregon State UniversitySão Paulo State University (UNESP) School of Veterinary Medicine and Animal ScienceUniversidade Estadual Paulista (Unesp)Eastern Oregon Agricultural Research Center-Oregon State UniversitySchubach, Kelsey MCooke, Reinaldo FBrandão, Alice PSchumaher, Thiago F [UNESP]Pohler, Ky GBohnert, David WMarques, Rodrigo S2020-12-12T00:55:43Z2020-12-12T00:55:43Z2019-10-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article4171-4181http://dx.doi.org/10.1093/jas/skz262Journal of Animal Science, v. 97, n. 10, p. 4171-4181, 2019.1525-31630021-8812http://hdl.handle.net/11449/19798010.1093/jas/skz2622-s2.0-85072943257Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Animal Scienceinfo:eu-repo/semantics/openAccess2021-10-23T07:40:19Zoai:repositorio.unesp.br:11449/197980Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:11:53.703407Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows
title Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows
spellingShingle Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows
Schubach, Kelsey M
beef heifers
growth
lactation
puberty
supplementation
title_short Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows
title_full Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows
title_fullStr Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows
title_full_unstemmed Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows
title_sort Impacts of postweaning growth rate of replacement beef heifers on their reproductive development and productivity as primiparous cows
author Schubach, Kelsey M
author_facet Schubach, Kelsey M
Cooke, Reinaldo F
Brandão, Alice P
Schumaher, Thiago F [UNESP]
Pohler, Ky G
Bohnert, David W
Marques, Rodrigo S
author_role author
author2 Cooke, Reinaldo F
Brandão, Alice P
Schumaher, Thiago F [UNESP]
Pohler, Ky G
Bohnert, David W
Marques, Rodrigo S
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Eastern Oregon Agricultural Research Center-Oregon State University
dc.contributor.author.fl_str_mv Schubach, Kelsey M
Cooke, Reinaldo F
Brandão, Alice P
Schumaher, Thiago F [UNESP]
Pohler, Ky G
Bohnert, David W
Marques, Rodrigo S
dc.subject.por.fl_str_mv beef heifers
growth
lactation
puberty
supplementation
topic beef heifers
growth
lactation
puberty
supplementation
description This experiment evaluated the effects of postweaning body weight (BW) gain of replacement beef heifers on their reproductive development and productivity as primiparous cows. Seventy-Two Angus × Hereford heifers were ranked on day-6 of experiment (17 d after weaning) by age and BW (218 ± 1.6 d of age and 234 ± 3 kg of BW), and assigned to receive 1 of 3 supplementation programs from days 0 to 182: 1) no supplementation to maintain limited BW gain (LGAIN), 2) supplementation to promote moderate BW gain (MGAIN), or 3) supplementation to promote elevated BW gain (HGAIN). Heifers were maintained in 2 pastures (36 heifers/pasture, 12 heifers/treatment in each pasture) with free-choice alfalfa-grass hay, and supplements were offered individually 6 d per week. Heifer shrunk BW was recorded on days-6 and 183 for average daily gain (ADG) calculation. Blood samples were collected for puberty evaluation via plasma progesterone weekly from days 0 to 182. On day 183, heifers were combined into a single group and received the same nutritional management until the end of the experimental period (day 718). From days 183 to 253, heifers were assigned to a fixed-Time artificial insemination program combined with natural service. Average daily gain from days 0 to 182 was greater (P < 0.01) in HGAIN vs. MGAIN and LGAIN (0.78, 0.60, and 0.37 kg/d, respectively; SEM = 0.02), and greater (P < 0.01) in MGAIN vs. LGAIN heifers. Puberty attainment by the beginning of the breeding season was also greater in HGAIN vs. MGAIN and LGAIN (87.5%, 62.5%, and 56.5%, respectively; SEM = 7.1) but similar (P = 0.68) between MGAIN vs. LGAIN heifers. A treatment × day interaction was detected (P < 0.01) for calving rate, as HGAIN heifers calved earlier compared with MGAIN and LGAIN heifers. Ten heifers per treatment were assessed for milk production via weigh-suckle-weigh at 56.8 ± 1.5 d postpartum, followed by milk sample collection 24 h later. No treatment differences were detected (P ≥ 0.16) for milk yield and composition. However, mRNA expression of GLUT1 in milk fat globules was less (P ≤ 0.02) in LGAIN vs. MGAIN and HGAIN heifers, and expression of GLUT8 mRNA was also less (P = 0.04) in LGAIN vs. HGAIN heifers. No treatment differences were detected (P ≥ 0.44) for offspring weaning BW. Collectively, results from this experiment indicate that HGAIN hastened the reproductive development of replacement heifers, without negatively affecting their milk productivity and offspring weaning weight as primiparous cows.
publishDate 2019
dc.date.none.fl_str_mv 2019-10-03
2020-12-12T00:55:43Z
2020-12-12T00:55:43Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1093/jas/skz262
Journal of Animal Science, v. 97, n. 10, p. 4171-4181, 2019.
1525-3163
0021-8812
http://hdl.handle.net/11449/197980
10.1093/jas/skz262
2-s2.0-85072943257
url http://dx.doi.org/10.1093/jas/skz262
http://hdl.handle.net/11449/197980
identifier_str_mv Journal of Animal Science, v. 97, n. 10, p. 4171-4181, 2019.
1525-3163
0021-8812
10.1093/jas/skz262
2-s2.0-85072943257
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Animal Science
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 4171-4181
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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