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Effects of αs1-casein (CSN1S1) and κ-casein (CSN3) genotypes on milk coagulation properties in Murciano-Granadina goats

Published online by Cambridge University Press:  10 January 2011

Francisco Caravaca
Affiliation:
Departamento de Ciencias Agroforestales, E.U.I.T.A., Universidad de Sevilla, 41013 Sevilla, Spain
José Luis Ares
Affiliation:
Instituto Andaluz de Investigación y Formación Agraria y Pesquera, Alameda del Obispo s/n, 14004 Córdoba, Spain
Juan Carrizosa
Affiliation:
Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA). Estación Sericícola. La Alberca, Murcia, Spain
Baltasar Urrutia
Affiliation:
Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA). Estación Sericícola. La Alberca, Murcia, Spain
Francisca Baena
Affiliation:
Departamento de Producción Animal, Campus de Rabanales, Universidad de Córdoba, 14071 Córdoba, Spain
Jordi Jordana
Affiliation:
Departament de Ciència Animal i dels Aliments, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
Bouabid Badaoui
Affiliation:
Departament de Ciència Animal i dels Aliments, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
Armand Sànchez
Affiliation:
Departament de Ciència Animal i dels Aliments, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
Antonella Angiolillo
Affiliation:
Dip. Scienze per la Salute, via de Sanctis snc, Università del Molise, Campobasso, Italy
Marcel Amills
Affiliation:
Departament de Ciència Animal i dels Aliments, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
Juan Manuel Serradilla*
Affiliation:
Departamento de Producción Animal, Campus de Rabanales, Universidad de Córdoba, 14071 Córdoba, Spain
*
*For correspondence; e-mail: pa1semaj@uco.es

Abstract

The effects of the caprine αs1-casein (CSN1S1) polymorphisms on milk quality and cheese yield have been widely studied in French and Italian goat breeds. Much less is known about the consequences of κ-casein (CSN3) genotype on the technological and coagulation properties of goat milk. In the current study, we have performed an association analysis between polymorphisms at the goat CSN1S1 and CSN3 genes and milk coagulation (rennet coagulation time, curdling rate and curd firmness) and technological (time to cutting of curd and cheese yield) properties. In this analysis, we have included 193 records from 74 Murciano-Granadina goats (with genotypes constituted by different combinations of alleles B, E and F of the gene CSN1S1 and alleles A and B of the gene CSN3) distributed in three herds, which were collected bimonthly during a whole lactation. Data analysis, using a linear mixed model for repeated observations, revealed significant associations between CSN1S1 genotypes and the rate of the curdling process. In this way, milk from EE goats had a significantly higher curdling rate than milk from BB individuals (P<0·05). Contrary to previous experiments performed in French breeds, cheese yield was not significantly different in BB, EE and EF goats. Moreover, we have shown that CSN3 genotype has a significant effect on the rennet coagulation time (BB>AB, P<0·05) but not on cheese yield. No interaction between the CSN1S1 and CSN3 genotypes was observed.

Information

Type
Research Article
Copyright
Copyright © Proprietors of Journal of Dairy Research 2010

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