2022
DOI: 10.3168/jds.2021-20914
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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 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 o… Show more

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Cited by 12 publications
(11 citation statements)
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“…In that sense, the abovementioned authors, Liu and coworkers, supplemented their lipidomic study with a global FA profile in a reduced cow’s cohort [ 16 ]. They described an increase in the content of long chain fatty acids (LCFA) accompanied by a reduction in short- and medium- chain fatty acids, similarly to other studies which also strictly controlled diet composition and feed [ 50 ] while others noted changes in unsaturated FA [ 51 ]. A limitation of the present research might be not including the milk FA profile, although some information can be obtained from a recent study [ 13 ].…”
Section: Discussionmentioning
confidence: 61%
“…In that sense, the abovementioned authors, Liu and coworkers, supplemented their lipidomic study with a global FA profile in a reduced cow’s cohort [ 16 ]. They described an increase in the content of long chain fatty acids (LCFA) accompanied by a reduction in short- and medium- chain fatty acids, similarly to other studies which also strictly controlled diet composition and feed [ 50 ] while others noted changes in unsaturated FA [ 51 ]. A limitation of the present research might be not including the milk FA profile, although some information can be obtained from a recent study [ 13 ].…”
Section: Discussionmentioning
confidence: 61%
“…In an attempt to evaluate the genetic effect of HS and genetic tolerance for milk production and its components in dairy cattle, genetic parameters were estimated for several indicators of HS phenotype and milk production response as well as resilience indicators traits in dairy cattle (12,50,79,80,(82)(83)(84)(85)(86). Alternatively, several HS indicators, for example, RT, RR, and DS are common physiological indicators used to identify heat-tolerant animals within a breed (13,87).…”
Section: Genetic Evaluation Of Heat Tolerance In Dairy Cattlementioning
confidence: 99%
“…Data can be downloaded from https://power.larc.nasa.gov by entering the latitude and longitude of the desired location, with single point, regional, or global coverage, and can be exported to a user-friendly output (e.g., in ASCII format). Recent studies have used meteorological data from the NASA POWER project to calculate THI and assess the effects of heat stress on livestock (Carrara et al 2021 ; Manica et al 2022 ; Salvian et al 2022 ; Dauria et al 2022 ; Rockett et al 2023 ).…”
Section: Introductionmentioning
confidence: 99%