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Journals / Adnan Menderes Üniversitesi Ziraat Fakültesi Dergisi / 2008 / Cilt: 5 Sayı: 1

Environmental Effects on Milk Protein Compositon in Holstein Friesian Cattle

ÇEVRESEL FAKTÖRLERiN SİYAH-ALACA SIĞIRDA SÜTÜN PROTEİN KOMPOZİYONUNA ETKİLERİ

Ayşe Deniz ÇARDAK
Pages
13–18
Publication Date
2008-03-01
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Increased SCC were associated with increased α-La, β-Lg, κ-Cn as well as decreased αS1-Cn and β-Cn content.

📌 3 Key Takeaways

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Objective & Hypothesis:Effects of season, parity number, stage of lactation and somatic cell count (SCC) on protein content as well as protein composition were investigated in Holstein Friesian cattle.
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Key Findings & Data:Season, stage of lactation, parity number and SCC affected αS1-casein (-Cn) content. β-Cn content was effected by season, parity number and SCC.
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Conclusion & Impact:Increased SCC were associated with increased α-La, β-Lg, κ-Cn as well as decreased αS1-Cn and β-Cn content.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Çevresel faktörler · αS1-Kazein · β-Kazein

Abstract

Effects of season, parity number, stage of lactation and somatic cell count (SCC) on protein content as well as protein composition were investigated in Holstein Friesian cattle. Milk protein fractions were quantified after polyacrylamide gel electrophoresis, using computer-assisted densitometer. Milk protein content was effected by season, stage of lactation and SCC. Season, stage of lactation, parity number and SCC affected αS1-casein (-Cn) content. β-Cn content was effected by season, parity number and SCC. Parity number, stage of lactation and season had significant effect on κ-Cn content. α-Lactalbumin (-La) content was effected by season, stage of lactation and SCC, while stage of lactation, parity number, season as well as SCC affected β-Lactoglobulin (-Lg) content. Protein, αS1-Cn and β-Lg content was higher between September-December. Increased parity number was associated with decreased αS1-Cn and increased β-Cn content. Last parity subclass had minimum κ-Cn and β-Lg content. Protein and β-Lg content was minimum in second lactation monat and then increased as lactation progressed, while αS1-Cn content was decreased. Increased SCC were associated with increased α-La, β-Lg, κ-Cn as well as decreased αS1-Cn and β-Cn content.

Özet

Çalışmada Siyah-Alaca sığırlarda sütün protein içeriği ve komposizyonuna mevsim, laktasyon sayısı, laktasyon dönemi ve somatik hücre sayısının (SHS) etkileri araştırılmıştır. Laktasyon boyunca toplanan süt örneklerinde protein fraksiyonları Poliakrilamid-Jel-Elektroforezi’nde ayrılmış ve densitometre yardımıyla her bir protein fraksiyonunun içeriği belirlenmiştir. Sütün protein içeriğine mevsim, laktasyon dönemi ve SHS’nın etkileri önemli bulunmuştur. αS1-kazein (-Cn) içeriğine mevsim, laktasyon dönemi, laktasyon sayısı, SHS; β-Cn içeriğine mevsim, laktasyon sayısı, SHS; κ-Cn içeriğine laktasyon sayısı, laktasyon dönemi, mevsim; α-Laktalbumin (-La) içeriğine mevsim, laktasyon dönemi, SHS; β-Laktoglobulin (-Lg) içeriğine laktasyon dönemi, laktasyon sayısı, mevsim ve SHS önemli etkiye sahiptir. Sütün protein, αS1-Cn ve β-Lg içeriği EylülAralık döneminde maksimum seviyededir. Laktasyon sayısının artmasıyla birlikte αS1-Cn içeriği azalmakta, β-Cn içeriği artmaktadır. Beşinci ve daha sonraki laktasyonlarda κ-Cn ve β-Lg içeriği minimum seviyededir. Laktasyonun ikinci ayında minimum olan protein ve β-Lg içeriği laktasyon sonuna kadar sürekli artmaktadır. αS1-Cn içeriğinde laktasyon süresince azalma belirlenmiştir. SHS’nın artmasıyla α-La, β-Lg ve κ-Cn içeriğinin arttığı; αS1-Cn ve β-Cn içeriğinin azaldığı tespit edilmiştir.

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Cite This Article

ÇARDAK, A. D. (2008). Environmental Effects on Milk Protein Compositon in Holstein Friesian Cattle. Adnan Menderes Üniversitesi Ziraat Fakültesi Dergisi, Cilt: 5 Sayı: 1, 13–18. https://ajindex.com/articles/920724

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References (14)

  1. Barry,J.G.,Donnelly,W.J.,1980.Casein ompositional studies. 1. The composition of casein from Friesian herd milks. J. Dairy Sci., 47, 71-82
  2. Bernabucci, U., Lacetera, N., Ronchi, B., Nardone, A., 2002. Effects of the hot season on milk protein fractions in Holstein cows. Anim. Res., 51, 25-33
  3. Coulon, J.-B, Hurtaud, C., Remond, B., Verite, R., 1998. Factors contributing to variation in the proportion of casein in cows milk true protein. A review of recent INRA experiments. J. Dairy Res., 65, 375-387
  4. Davies, D.T., Law, A.J.R., 1983. Variation in the protein composition of bovine casein micelles and serum casein in relation to micellar size and milk temperature. J. Dairy Res., 50, 67-75
  5. Eigel, W N., Butler, J.E., Ernstrom, C.A., Farrell, H.M., Harwalkar, V.R., Jenness, R., Whitney, R. McL. 1984. Nomenclature of Proteins of Cow’s Milk: Fifth Revision. J. Dairy Science, 67, 1599-1631
  6. Grieve, P.A., Kitchen, B.J., 1985. Proteolysis in milk: the significance of proteinases originating from milk leucocytes and a comparison of the action of leucocyte, bacterial and natural milk proteinases on casein. J. Dairy Res., 52, 101-112
  7. Haenlein, G.F.W., Schultz, L.H., Zikakis, J.P., 1973. Composition of proteins in milk with varying leucozyte counts. J. Dairy Sci., 56, 1017-1024
  8. Kirchmeier, O., 1973. Einfluss klimatischer Faktoren auf die Eiweissqualitaet der Milch. Milchwissenschaft, 28, 440-443
  9. Kroeker, E.M., Ng-Kwai-Hang, K.F., Hayes, J.F., Moxley, J.E., 1985a. Effects of environmental factor and milk protein polymorphism on composition of casein fraction in bovine milk. J. Dairy Sci., 68, 1752-1757
  10. Kroeker, E.M., Ng-Kwai-Hang, K.F., Hayes, J.F., Moxley, J.E., 1985b. Effect of beta- lactoglobulin variant and environmental factors on variation in the detailed composition of bovine milk serum proteins. J. Dairy Sci., 68, 1637-1641
  11. Mackle, T.R., Bryant, A.M., Petch, S.F., Hill, J.P., Auldist, M.J., 1999. Nutritional influences on the composition of milk from cows of different protein phenotypes in New Zealand. J. Dairy Sci., 82, 172-180
  12. McLean, D.M., Graham, E.R.B., Ponzoni, R.W., McKenzie, H.A., 1984. Effects of milk protein genetic variants on milk yield and composition. J. Dairy Research, 51, 531-546
  13. Ng-Kwai-Hang, K.F., Hayes, J.F., Moxley, J.E., Monardes, H.G., 1987. Variation in milk protein concentrations associated with genetic polymorphism and environmental factors. J. Dairy Sci., 70, 563-570
  14. Ostersen, S., Foldager, J., Hermansen, J.E., 1997. Effects of stage of lactat