2022
DOI: 10.3390/ani12070839
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Genotype by Environment Interaction and Selection Response for Milk Yield Traits and Conformation in a Local Cattle Breed Using a Reaction Norm Approach

Abstract: Local breeds are often reared in various environmental conditions (EC), suggesting that genotype by environment interaction (GxE) could influence genetic progress. This study aimed at investigating GxE and response to selection (R) in Rendena cattle under diverse EC. Traits included milk, fat, and protein yields, fat and protein percentage, and somatic cell score, three-factor scores and 24 linear type traits. The traits belonged to 11,085 cows (615 sires). Variance components were estimated in a two-step reac… Show more

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Cited by 3 publications
(3 citation statements)
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“…Other studies [2,22,[58][59][60][61][62][63] show small GEI effects and correlation values close to unity, with no significant reclassification of sires for milk production, whether with reaction norms or with analysis of genetic and order correlations between environments.…”
Section: Plos Onementioning
confidence: 99%
“…Other studies [2,22,[58][59][60][61][62][63] show small GEI effects and correlation values close to unity, with no significant reclassification of sires for milk production, whether with reaction norms or with analysis of genetic and order correlations between environments.…”
Section: Plos Onementioning
confidence: 99%
“…Em geral, a variância genética foi menor que a variância residual e ambas as variâncias aumentaram proporcionalmente ao longo do gradiente ambiental. Estudos anteriores avaliando IGA para características de produção de leite, gordura e proteína também encontraram variações nas estimativas de variâncias genética e residual ao longo do gradiente ambiental (GAIA et al, 2018;MOREIRA et al, 2019;SANTANA Jr. et al, 2019;BOHLOULI et al, 2021;CHERUIYOT et al, 2020;SARTORI et al, 2022).…”
Section: Discussionunclassified
“…Assim, no gradiente ambiental, são traçadas curvas aleatórias (normas de reação) dos valores genéticos para as características avaliadas, dessa forma cada indivíduo pode apresentar uma trajetória diferente (HAYES et al, 2016). Desse modo, os modelos de normas de reação permitem predizer os valores genéticos de um indivíduo em diferentes ambientes (SARTORI et al, 2022), observar a mudança no desempenho de um genótipo quando ocorre variação no ambiente (AMBROSINI et al, 2016) O objetivo deste estudo foi avaliar a presença de IGA para as características de produção de leite, gordura e proteína de animais da raça Guzerá utilizando modelos de normas de reação e assumindo as soluções para os efeitos de grupos de contemporâneos como gradiente ambiental.…”
Section: Introductionunclassified