Survey of milk protein polymorphism in the "Rossa Siciliana" dairy cattle

Risultato della ricerca: Other

Abstract

“Rossa Siciliana” is a dairy cattle population traditionally linked to cheese production protein polymorphisms from 62 individual milk samples from 19 farms were analyzed by isoelectrofocusing. High variability was found at the CNS1S1, CSN2, CSN3, LGB and LALBA loci, while the CNS1S2 locus was monomorphic for the A allele. The casein haplotype frequencies and the occurrence of the linkage disequilibrium, taking into account the association among loci were investigated. The population was not in Hardy-Weinberg equilibrium (Chi-square=19.0, p-value=0.0407), probably due to genetic drift. Frequencies of the three allele detected at CSN1S1 locus were B (0.734), C (0.258) and D (0.008). high frequencies were found for CSN2*A2 (0.573) and CSN3*B (0.637). Whey protein showed high frequencies for LALBA*B (0.903) and LGB*B (0.815). Strong linkage disequilibrium was detected for the polymorphic casein loci CSN1S1-CSN2-CSN3. Out of the 27 possible combination from the 3x3x3 alleles considered, only four haplotypes had a frequency above 0.10. the most frequent haplotype frequency was BA2B (0.236) followed by CA2B (0.214), BA1A (0.168), BA1B (0.131), and BA2A (0.094). the CSN1S1*B variant showed an allele frequency of 0.734 and occurred in almost all haplotype combinations.
Lingua originaleEnglish
Numero di pagine1
Stato di pubblicazionePublished - 2005

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dairy protein
dairy cattle
genetic polymorphism
haplotypes
loci
linkage disequilibrium
alleles
casein
genetic drift
whey protein
gene frequency
cheeses
milk
farms
proteins
sampling

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title = "Survey of milk protein polymorphism in the {"}Rossa Siciliana{"} dairy cattle",
abstract = "“Rossa Siciliana” is a dairy cattle population traditionally linked to cheese production protein polymorphisms from 62 individual milk samples from 19 farms were analyzed by isoelectrofocusing. High variability was found at the CNS1S1, CSN2, CSN3, LGB and LALBA loci, while the CNS1S2 locus was monomorphic for the A allele. The casein haplotype frequencies and the occurrence of the linkage disequilibrium, taking into account the association among loci were investigated. The population was not in Hardy-Weinberg equilibrium (Chi-square=19.0, p-value=0.0407), probably due to genetic drift. Frequencies of the three allele detected at CSN1S1 locus were B (0.734), C (0.258) and D (0.008). high frequencies were found for CSN2*A2 (0.573) and CSN3*B (0.637). Whey protein showed high frequencies for LALBA*B (0.903) and LGB*B (0.815). Strong linkage disequilibrium was detected for the polymorphic casein loci CSN1S1-CSN2-CSN3. Out of the 27 possible combination from the 3x3x3 alleles considered, only four haplotypes had a frequency above 0.10. the most frequent haplotype frequency was BA2B (0.236) followed by CA2B (0.214), BA1A (0.168), BA1B (0.131), and BA2A (0.094). the CSN1S1*B variant showed an allele frequency of 0.734 and occurred in almost all haplotype combinations.",
keywords = "Rossa Siciliana dairy cattle, milk proteins, polymorphisms",
author = "Sardina, {Maria Teresa} and Baldassare Portolano",
year = "2005",
language = "English",

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TY - CONF

T1 - Survey of milk protein polymorphism in the "Rossa Siciliana" dairy cattle

AU - Sardina, Maria Teresa

AU - Portolano, Baldassare

PY - 2005

Y1 - 2005

N2 - “Rossa Siciliana” is a dairy cattle population traditionally linked to cheese production protein polymorphisms from 62 individual milk samples from 19 farms were analyzed by isoelectrofocusing. High variability was found at the CNS1S1, CSN2, CSN3, LGB and LALBA loci, while the CNS1S2 locus was monomorphic for the A allele. The casein haplotype frequencies and the occurrence of the linkage disequilibrium, taking into account the association among loci were investigated. The population was not in Hardy-Weinberg equilibrium (Chi-square=19.0, p-value=0.0407), probably due to genetic drift. Frequencies of the three allele detected at CSN1S1 locus were B (0.734), C (0.258) and D (0.008). high frequencies were found for CSN2*A2 (0.573) and CSN3*B (0.637). Whey protein showed high frequencies for LALBA*B (0.903) and LGB*B (0.815). Strong linkage disequilibrium was detected for the polymorphic casein loci CSN1S1-CSN2-CSN3. Out of the 27 possible combination from the 3x3x3 alleles considered, only four haplotypes had a frequency above 0.10. the most frequent haplotype frequency was BA2B (0.236) followed by CA2B (0.214), BA1A (0.168), BA1B (0.131), and BA2A (0.094). the CSN1S1*B variant showed an allele frequency of 0.734 and occurred in almost all haplotype combinations.

AB - “Rossa Siciliana” is a dairy cattle population traditionally linked to cheese production protein polymorphisms from 62 individual milk samples from 19 farms were analyzed by isoelectrofocusing. High variability was found at the CNS1S1, CSN2, CSN3, LGB and LALBA loci, while the CNS1S2 locus was monomorphic for the A allele. The casein haplotype frequencies and the occurrence of the linkage disequilibrium, taking into account the association among loci were investigated. The population was not in Hardy-Weinberg equilibrium (Chi-square=19.0, p-value=0.0407), probably due to genetic drift. Frequencies of the three allele detected at CSN1S1 locus were B (0.734), C (0.258) and D (0.008). high frequencies were found for CSN2*A2 (0.573) and CSN3*B (0.637). Whey protein showed high frequencies for LALBA*B (0.903) and LGB*B (0.815). Strong linkage disequilibrium was detected for the polymorphic casein loci CSN1S1-CSN2-CSN3. Out of the 27 possible combination from the 3x3x3 alleles considered, only four haplotypes had a frequency above 0.10. the most frequent haplotype frequency was BA2B (0.236) followed by CA2B (0.214), BA1A (0.168), BA1B (0.131), and BA2A (0.094). the CSN1S1*B variant showed an allele frequency of 0.734 and occurred in almost all haplotype combinations.

KW - Rossa Siciliana dairy cattle

KW - milk proteins

KW - polymorphisms

UR - http://hdl.handle.net/10447/66383

M3 - Other

ER -