Genetic effects of heat stress on milk fatty acids in Brazilian Holstein cattle
ABSTRACT: The present study aimed to estimate covariance components of milk fatty acids (FA) and to compare the genomic estimated breeding values under general and heat-stress effects. Data consisted of 38,762 test-day records from 6,344 Holstein cows obtained from May 2012 through January 2018 on 4...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-04-01
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| Series: | Journal of Dairy Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0022030222000418 |
| _version_ | 1829459475346489344 |
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| author | B.D. Dauria A. Sigdel J. Petrini P.P. Bóscollo F. Pilonetto M. Salvian F.M. Rezende V.B. Pedrosa C.M.M. Bittar P.F. Machado L.L. Coutinho G.R. Wiggans G.B. Mourão |
| author_facet | B.D. Dauria A. Sigdel J. Petrini P.P. Bóscollo F. Pilonetto M. Salvian F.M. Rezende V.B. Pedrosa C.M.M. Bittar P.F. Machado L.L. Coutinho G.R. Wiggans G.B. Mourão |
| author_sort | B.D. Dauria |
| collection | DOAJ |
| description | ABSTRACT: The present study aimed to estimate covariance components of milk fatty acids (FA) and to compare the genomic estimated breeding values under general and heat-stress effects. Data consisted of 38,762 test-day records from 6,344 Holstein cows obtained from May 2012 through January 2018 on 4 dairy herds from Brazil. Single-trait repeatability test-day models with random regressions as a function of temperature-humidity index values were used for genetic analyses. The models included contemporary groups, parity order (1–6), and days in milk classes as fixed effects, and general and thermotolerance additive genetic and permanent environmental as random effects. Notably, differences in heritability estimates between environments (general and heat stress) increased (0.03 to 0.06) for unsaturated FA traits, such as unsaturated, monounsaturated, and polyunsaturated, at higher heat-stress levels. In contrast, heritability estimated between environments for saturated FA traits, including saturated FA, palmitic acid (C16:0), and stearic acid (C18:0) did not observe significant differences between environments. In addition, our study revealed negative genetic correlations between general and heat-stress additive genetic effects (antagonistic effect) for the saturated FA, C16:0, C18:0, and C18:1, which ranged from −0.007 to −0.32. Spearman's ranking correlation between genomic estimated breeding values ranged from −0.27 to 0.99. Results indicated a moderate to strong interaction of genotype by the environment for most FA traits comparing a heat-stress environment with thermoneutral conditions. Our findings point out novel opportunities to explore the use of FA milk profile and heat-stress models. |
| first_indexed | 2024-12-12T11:20:08Z |
| format | Article |
| id | doaj.art-eea31b79c41741ffb005cfd0b3abc5e6 |
| institution | Directory Open Access Journal |
| issn | 0022-0302 |
| language | English |
| last_indexed | 2024-12-12T11:20:08Z |
| publishDate | 2022-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Dairy Science |
| spelling | doaj.art-eea31b79c41741ffb005cfd0b3abc5e62022-12-22T00:26:03ZengElsevierJournal of Dairy Science0022-03022022-04-01105432963305Genetic effects of heat stress on milk fatty acids in Brazilian Holstein cattleB.D. Dauria0A. Sigdel1J. Petrini2P.P. Bóscollo3F. Pilonetto4M. Salvian5F.M. Rezende6V.B. Pedrosa7C.M.M. Bittar8P.F. Machado9L.L. Coutinho10G.R. Wiggans11G.B. Mourão12Department of Animal Science, University of São Paulo, Piracicaba, SP 13418-900, BrazilDepartment of Animal and Dairy Science, University of Wisconsin, Madison 53706Department of Animal Science, University of São Paulo, Piracicaba, SP 13418-900, BrazilDepartment of Animal Science, University of São Paulo, Piracicaba, SP 13418-900, BrazilDepartment of Animal Science, University of São Paulo, Piracicaba, SP 13418-900, BrazilDepartment of Animal Science, University of São Paulo, Piracicaba, SP 13418-900, BrazilDepartment of Animal Sciences, University of Florida, Gainesville 32608Department of Animal Science, State University of Ponta Grossa, Ponta Grossa, PR 84030-900, BrazilDepartment of Animal Science, University of São Paulo, Piracicaba, SP 13418-900, BrazilDepartment of Animal Science, University of São Paulo, Piracicaba, SP 13418-900, BrazilDepartment of Animal Science, University of São Paulo, Piracicaba, SP 13418-900, BrazilAnimal Genomics and Improvement Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705-2350Department of Animal Science, University of São Paulo, Piracicaba, SP 13418-900, Brazil; Corresponding authorABSTRACT: The present study aimed to estimate covariance components of milk fatty acids (FA) and to compare the genomic estimated breeding values under general and heat-stress effects. Data consisted of 38,762 test-day records from 6,344 Holstein cows obtained from May 2012 through January 2018 on 4 dairy herds from Brazil. Single-trait repeatability test-day models with random regressions as a function of temperature-humidity index values were used for genetic analyses. The models included contemporary groups, parity order (1–6), and days in milk classes as fixed effects, and general and thermotolerance additive genetic and permanent environmental as random effects. Notably, differences in heritability estimates between environments (general and heat stress) increased (0.03 to 0.06) for unsaturated FA traits, such as unsaturated, monounsaturated, and polyunsaturated, at higher heat-stress levels. In contrast, heritability estimated between environments for saturated FA traits, including saturated FA, palmitic acid (C16:0), and stearic acid (C18:0) did not observe significant differences between environments. In addition, our study revealed negative genetic correlations between general and heat-stress additive genetic effects (antagonistic effect) for the saturated FA, C16:0, C18:0, and C18:1, which ranged from −0.007 to −0.32. Spearman's ranking correlation between genomic estimated breeding values ranged from −0.27 to 0.99. Results indicated a moderate to strong interaction of genotype by the environment for most FA traits comparing a heat-stress environment with thermoneutral conditions. Our findings point out novel opportunities to explore the use of FA milk profile and heat-stress models.http://www.sciencedirect.com/science/article/pii/S0022030222000418temperature-humidity indexheat stressvariance componentfatty acidHolstein |
| spellingShingle | B.D. Dauria A. Sigdel J. Petrini P.P. Bóscollo F. Pilonetto M. Salvian F.M. Rezende V.B. Pedrosa C.M.M. Bittar P.F. Machado L.L. Coutinho G.R. Wiggans G.B. Mourão Genetic effects of heat stress on milk fatty acids in Brazilian Holstein cattle Journal of Dairy Science temperature-humidity index heat stress variance component fatty acid Holstein |
| title | Genetic effects of heat stress on milk fatty acids in Brazilian Holstein cattle |
| title_full | Genetic effects of heat stress on milk fatty acids in Brazilian Holstein cattle |
| title_fullStr | Genetic effects of heat stress on milk fatty acids in Brazilian Holstein cattle |
| title_full_unstemmed | Genetic effects of heat stress on milk fatty acids in Brazilian Holstein cattle |
| title_short | Genetic effects of heat stress on milk fatty acids in Brazilian Holstein cattle |
| title_sort | genetic effects of heat stress on milk fatty acids in brazilian holstein cattle |
| topic | temperature-humidity index heat stress variance component fatty acid Holstein |
| url | http://www.sciencedirect.com/science/article/pii/S0022030222000418 |
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