Borba, Luis Henrique FernandesAraújo, João Baptista Gondim de2022-11-172022-11-172022-08-30ARAUJO, João Baptista Gondim de. Efeito do polimorfismo da kappa caseína na composição e incidência de leite instável não ácido (LINA) em vacas Jersey. Orientador: Luís Henrique Fernandes Borba. 2022. 41f. Dissertação (Mestrado em Produção Animal) - Escola Agrícola de Jundiaí, Universidade Federal do Rio Grande do Norte, Natal, 2022.https://repositorio.ufrn.br/handle/123456789/49795The incidence of UNAM (non-acidic unstable milk) has great importance in the dairy market as a function of being directly linked to the resistance of milk to the heat treatments used in industrial processes for the conservation of its products is thus to increase shelf life The variation in concentration and quality of components influence the stability of casein micelles and consequently their thermal stability. This experiment aimed to study the effect of kappacasein polymorphism on the composition and incidence of UNAM in milk samples collected at County of São Gonçalo do Amarante, Estado do Rio Grande do Norte. The animals were created in the Compost Barn system, and the Jersey herd was genotyped for beta and kappacasein and selected for the A2A2 beta-casein variant. A total of 127 samples were collected and titratable acidity, SCC, centesimal composition, and alcohol stability were analyzed at concentrations of 72°, 74° and 78°. In the experiment, no influence of kappa casein polymorphism was observed for protein, fat, lactose, total solids, and solid extract without fats. No significant correlation of SCC was observed with the other components studied. However, there were significant differences at various levels between the other components, the high correlations with fat with ST, Protein with Lactose, ST, SNG were highlighted by the high correlations with Fat with ST, Protein with Lactose, ST, SNG; Lactose with ST, SNG The influence of kappa-casein polymorphism on milk stability was not observed. No influence of somatic cell count was observed with the incidence of UNOM. No effect of Kappa-casein polymorphisms was observed in SCC. Concluded that kappa-casein polymorphism does not affect milk stability.Acesso AbertoBovinocultura leiteiraPolimorfismoKappa-caseínaLINAProva do álcoolmasterThesisCNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::PRODUCAO ANIMAL