Using multivariate factor analysis to characterize the unbranched fatty acid profile in bovine rumen fluid

Julián A. C. Vargas

doi:10.17533/udea.rccp.v32n3a02

Autores

Julián A. C. Vargas Universidade Estadual Paulista

DOI:

https://doi.org/10.17533/udea.rccp.v32n3a02

Palavras-chave:

ácidos graxos não ramificados, análise multivariada fatorial, estatística multivariada, fluido ruminal, gado, perfil lipídico, metabolismo de lipídeos, ruminante

Resumo

Antecedentes: A análise multivariada fatorial (MFA) poderia ser aplicada na análise do padrão complexo de correlações entre ácidos graxos (FAs) no rúmen. Objetivo: Investigar o potencial de uso do MFA para extrair informação sobre o metabolismo de FAs não ramificados no fluido ruminal de bovinos. Métodos: Construiu-se um banco de dados formado por 107 registros individuais de 26 FAs não ramificados, oriundos de dois estudos de incubação in vitro. A MFA foi desenvolvida usando o programa SPSS (Statistical Package for the Social Sciences). Resultados: A MFA extraiu quatro fatores latentes, quantificando 86.7% da variância total. O primeiro fator correlacionou-se positivamente com FAs saturados (SFAs) de cadeia curta (6:0), meia (8:0, 10:0, 12:0, 14:0 e 16:0) e longa (17:0, 20:0 e 23:0) bem como com os FAs monoinsaturados (MUFAs) de 14 a 16 átomos de carbono (14:1-t5, 14:1-c9, 15:1-t10, 16:1-c9 y 16:1-t9). O segundo fator correlacionou-se positivamente com 18:0 e com a maioria de MUFAs cis y trans de 18 átomos de carbono (18:1-t9, 18:1-t11, 18:1-c6, 18:1-c9 e 18:1-c11). O terceiro fator correlacionou-se positivamente com 18:3-c9,c12,c15 e 18:2-t11,c15 e negativamente com 18:2-c9,t11. O quarto fator correlacionou-se positivamente com 18:1-t6 e 19:0; porém, 19:0 também se correlacionou negativamente com o segundo fator. O 18:2-c9,c12 se correlacionou negativamente com os fatores segundo e terceiro. Conclusão: A análise multivariada fatorial (MFA) permitiu reduzir um número grande de ácidos graxos no fluido ruminal a poucos fatores latentes com significado biológico.

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Biografia do Autor

Julián A. C. Vargas, Universidade Estadual Paulista

Faculdade de Ciências Agrárias e Veterinárias, Departamento de Zootecnia, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Jaboticabal, São Paulo, Brasil.

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