Composition of milk of native Greek goats in the region of metsovo

Simos, E.; Voutsinas, L.P.; Pappas, Christophoros P.

doi:10.1016/0921-4488(91)90052-r

Cited by 52 publications

(32 citation statements)

References 19 publications

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“…Conversely, according to a previous study by [28], it was reported that, milk fat, protein, and solid non-fat were negatively correlated to increase in milk yield. In addition, ref.…”

Section: Discussionmentioning

confidence: 95%

Yield and Milk Composition at Different Stages of Lactation from a Small Herd of Nguni, Boer, and Non-Descript Goats Raised in an Extensive Production System

2017

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This study was conducted to evaluate the yield and composition of milk from 30 indigenous South African goats of different genotypes, namely Nguni, Boer, and non-descript, reared under a free-ranging system. Milk yield and composition (milk fat, protein, lactose, solid non-fat, and minerals) from Nguni (10), Boer (10) and non-descript (10) goats were measured and analysed per week at each stage of lactation. Results showed that Nguni goats produced (1.2 ± 0.09, 1.3 ± 0.11 and 1.2 ± 0.07 L per day) more milk (p < 0.05) at early, mid-, and late stages of lactation than Boer (0.6 ± 0.10, 1.0 ± 0.17, and 0.6 ± 0.09 L per day) and non-descript (0.3 ± 0.10, 0.3 ± 0.12, and 0.3 ± 0.09 L per day) goats, respectively. The mean value of milk fat, protein, and lactose content from Nguni goats was 3.98, 3.54, and 5.31; Boer goats, 2.9, 3.59, and 5.04 and non-descript goats, 4.05, 3.39, and 5.02, respectively. There was a significant effect (p < 0.05) of genotypes on milk fat, milk magnesium, and sodium contents of Nguni, Boer, and non-descript goats. It could be concluded that Nguni goats produced more milk than Boer and non-descript goats, but the non-descript goat had a higher mean percentage of milk fat compared to Nguni and Boer goats.

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“…Conversely, according to a previous study by [28], it was reported that, milk fat, protein, and solid non-fat were negatively correlated to increase in milk yield. In addition, ref.…”

Section: Discussionmentioning

confidence: 95%

Yield and Milk Composition at Different Stages of Lactation from a Small Herd of Nguni, Boer, and Non-Descript Goats Raised in an Extensive Production System

2017

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“…The total protein content, 36.7 ± 2.6 g·L -1 , and the casein content, 29.7 ± 2.3 g·L -1 , were higher than those of international highly selected breeds [33,34,46] and similar to those of the milk from indigenous Greek goats [1,45]. The same was true for the α s1 -cn, which was 21.8% of the total cn fraction, compared with the 8-17% reported for highly selected breeds.…”

Section: Resultsmentioning

confidence: 99%

Protein composition and polymorphism in the milk of Skopelos goats

Moatsou

Vamvakaki

Mollé

et al. 2006

Lait

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-Individual milk samples taken from goats of the Skopelos breed of Greece were analyzed by RP-HPLC using as standards the casein fraction of milks of known genotypes. Milk samples with particular characteristics with respect to the casein fraction were further analyzed by IEF and RP-HPLC/ESI-MS. The mean total protein content (36.7 ± 2.6 g·L -1 ) and the mean casein content (29.7 ± 2.3 g·L -1 ) were high. The same was true for the α s1 -cn fraction, which was 21.8% of the total cn fraction, whereas the β-cn percentage of total cn was 43.8%. The respective values for α s2 -cn and κ-cn were 13.7% and 13.8%. These quantitative characteristics were consistent with the predominance of the strong α s1 -cn variants B3, B4 and As/B1. In all samples analyzed by RP-HPLC/ ESI-MS the deleted form differing from the respective complete form by Gln78 was found at different levels of phosphorylation, with the exception of variants F and D/G. The most frequent α s2 -cn variant was by far variant A followed by variants C and F, whereas compositional data implied the existence of a null allele. The detected β-cn forms were variants A and C in similar frequencies. Variant D (formerly B) of κ-cn predominated and the rare variant G was found. Different phosphorylation types of each casein variant and the characteristics of whey proteins were also determined.goat milk protein / casein genotype / phosphorylation / protein quantification / polymorphism Résumé -Polymorphisme des protéines du lait de chèvre de la race Skopelos. Des laits individuels de chèvres de Skopelos (Grèce) ont été analysés par RP-HPLC et les profils protéiques ont été comparés avec ceux issus de lait de chèvres de génotypes connus au locus α s1 . Les échantillons qui présentaient des caractéristiques particulières de leur fraction caséique ont été analysés par IEF et RP-HPLC/ESI-MS. Les teneurs moyennes en protéines totales (36,7 ± 2,6 g·L -1 ), et en caséines (29,7 ± 2,3 g·L -1 ), étaient plus élevées que dans les laits des races hautement sélectionnées. Le pourcentage en α s1 -cn représentait 21,8 % des caséines totales, tandis que celui de la β-cn atteignait 43,8 %. Les pourcentages en α s2 -cn et κ-cn étaient respectivement 13,7 % et 13,8 %. Ces caracté-ristiques quantitatives étaient corrélées avec la prédominance des variants forts B3, B4 et As/B1 de la α s1 -cn. Dans tous les échantillons analysés par RP-HPLC/ESI-MS, la forme déplétée en Gln78 de la α s1 -cn présentait plusieurs niveaux de phosphorylation, à l'exception des variants F et D/G. Le variant le plus abondant de la α s2 -cn était le variant A suivi par les variants C et F. Les variants A et C de la β-cn ont été trouvés en fréquences similaires. Le variant D (antérieurement dénommé B) de la κ-cn était prédominant bien que le variant rare G était aussi trouvé. Plusieurs niveaux de phosphorylation de chacun de ces variants ont été aussi mis en évidence, ainsi que les principales caractéristiques des protéines du sérum.polymorphisme / variant proteique / lait de chèvre / caséine / génotype /...

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“…According to a previous study by [28], it was reported that, milk fat, protein and solid non-fat were negatively correlated to increase in milk yield. In addition, [5] reported a negative correlation between solid non-fat and milk yield and not between milk yield and milk fat or protein content.…”

Section: Discussionmentioning

confidence: 99%

Yield and Milk Quality Parameters at Different Stages of Lactation from a Small Herd of Nguni, Boer and Non-Descript Goats Raised in an Extensive Production System

Idamokoro¹,

Muchenje²,

Masika³

2017

Preprint

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This study was conducted to evaluate the yield and quality parameters of milk from 60 indigenous South African goats of different genotypes namely Nguni, Boer and Non-descript reared under a free ranging system. Milk yield and quality parameters (milk fat, protein, lactose, solid non-fat and minerals) from Nguni (10), Boer (10) and Non-descript (10) goats was measured and analysed per week at each stage of lactation. Result showed that, Nguni goats produced (1.2±0.09, 1.3±0.11 and 1.2±0.07 litres per day) more milk (P ˂ 0.05) at early, mid and late stages of lactation than Boer (0.6±0.10, 1.0±0.17 and 0.6±0.09 litres per day) and Non-descript (0.3±0.10, 0.3±0.12 and 0.3±0.09 litres per day) goats, respectively. The mean value of milk fat, protein and lactose content from Nguni goat was (3.98, 3.54 and 5.31); Boer goat (2.9, 3.59 and 5.04) and Nondescript goat (4.05, 3.39 and 5.02), respectively. There was significant effect (P ˂ 0.05) of genotypes on milk fat, milk magnesium and sodium contents of Nguni, Boer and Non-descript goats. It could be concluded that, Nguni goat produced more milk than Boer and Non-descript goats, but the Nondescript goat had higher mean percentage of milk fat compared to Nguni and Boer goats.

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Composition of milk of native Greek goats in the region of metsovo

Cited by 52 publications

References 19 publications

Yield and Milk Composition at Different Stages of Lactation from a Small Herd of Nguni, Boer, and Non-Descript Goats Raised in an Extensive Production System

Yield and Milk Composition at Different Stages of Lactation from a Small Herd of Nguni, Boer, and Non-Descript Goats Raised in an Extensive Production System

Protein composition and polymorphism in the milk of Skopelos goats

Yield and Milk Quality Parameters at Different Stages of Lactation from a Small Herd of Nguni, Boer and Non-Descript Goats Raised in an Extensive Production System

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