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- Title
Über Inhaltsstoffe der Milch von Thüringer Waldziegen und Weißen Deutschen Edelziegen: Eine vergleichende Untersuchung.
- Authors
Sorg, Diana; Jandowsky, Anabell; Frölich, Kai; Bostedt, Hartwig
- Abstract
Goat milk products are becoming increasingly popular worldwide. The milk of various goat breeds in Germany has so far been poorly characterized and standardized. Therefore, the milk of nine Thuringian Forest Goats (TFG) as representatives of an endangered local German goat breed and ten German Improved White Goats (GIWG) as reference for a frequently used dairy breed was analysed for various nutritional parameters. Milk samples were collected by hand milking on day 0, 4, 20 and 59 of the lactation. The goats were kept in one herd on one location (Zoo Ark Warder, a zoo for rare old breeds) to eliminate many external factors influencing the ingredients such as feeding, management, season. Breed differences were found in somatic cell count (TFG: 3.8-50.6 x 105/ml, GIWG: 1.7-6.0 x105/ml, on day 4: p<0.05), with the goats showing no clinical signs of mastitis. Furthermore differences were either trend: in levels of saturated fatty acids (SFA; TFG: 68.22-70.00%; GIWG: 63.23-65.23%, on day 59: p<0.1), monounsaturated fatty acids (MUFA; TFG: 25.40-27.31%; GIWG: 28.93-32.23%; on day 59: p<0.1), n-3 fatty acids (n3; TFG: 0.91-1.43%; GIWG: 0.92-1.30%; on day 0: p<0.1), the index of thrombogenicity (IT; TFG: 1.49-1.68; GIWG: 1.22-1.57; on day 20 and 59: p<0.1) or significant: short-chain fatty acids (SCFA; TFG: 6.61-8.51%; GIWG: 5.29-8.19%; on day 4: p<0.05), a conjugated linoleic acid isomer (CLA, C18:2 cis-9,trans-11; TFG: 0.53-1.18%; GIWG: 0.42-0.89%; on day 0 and 20: p<0.05, on day 4: p<0.1), in the ratio of n-6 to n-3 fatty acids (n6/n3; TFG: 2.43-2.58; GIWG: 2.57-2.87; on day 0, 4 and 59: p<0.05). Cholesterol levels did not differ significantly between the breeds, but TFG had markedly lower levels on day 0 and 4 (378.82 µg/ml and 150.36 µg/ml) than the GIWG (505.75 µg/ml and 223.38 µg/ml). Taken together, neither of the two breeds had milk with a consistently higher nutritional quality across all of the components studied. For the first time milk from TFG was extensively studied for important nutritional components and compared with the milk of GIWG.
- Subjects
SOMATIC cells; GOAT milk; FATTY acids; CHOLESTEROL; ANIMAL breeds; LINOLEIC acid
- Publication
Journal of Food Safety & Food Quality / Archiv für Lebensmittelhygiene, 2020, Vol 71, Issue 5, p106
- ISSN
0003-925X
- Publication type
Article
- DOI
10.2376/0003-925X-71-115