Factors of variation influencing production level,
SCC and basic milk composition in dairy goats

Olechnowicz, J.; Sobek, Z.

doi:10.22358/jafs/66468/2008

Cited by 22 publications

(15 citation statements)

References 19 publications

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“…Contrary to our finding on the lactose content of milk for Nguni Boer and non-descript goats, some researchers have reported a decrease in lactose content in goat milk at the late lactation stage compared to the early and mid-lactation stages [37,45,46]. However, in agreement with our finding, it was observed that, lactose content in milk increased at early and late lactation [41].…”

Section: Discussionsupporting

confidence: 69%

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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Section: Discussionsupporting

confidence: 69%

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 effects of age on the milk production of goats were similar to data recorded by Mavrogenis et al (1984). In close agreement with Olechnowicz & Sobek (2008), no significant influence was found for number of kids born on the quantitative parameters of milk yield. The effects of age and lactation length on milk composition should depend on negative correlation with yield and contents of milk.…”

Section: Resultssupporting

confidence: 83%

Determining the frequencies of B1, B2, B3 and E alleles of the <i>CSN1S1</i> gene and their effects on milk yield and composition in Saanen goats

Dinçel¹,

Ardıçlı²,

Şamlı³

et al. 2016

SA J. An. Sci.

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The aim of the study was to determine the frequencies of B1, B2, B3 and E alleles of the CSN1S1 gene and their effects on milk yield and composition in the Saanen goat breed. Milk samples were collected to identify milk composition with Fourier transform ınfrared (FTIR) spectroscopy. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was used to characterize the alleles of CSN1S1 gene. The allelic frequencies of the B1, B2, B3 and E alleles were 0.927, 0.073, 0.390, and 0.272, respectively. B1 and B2 alleles did not affect milk yield and composition. B3 allele had significant effects on protein, fat, total solid (TS), solid not fat (SNF), casein and lactose percentages, but not on lactose yield. E allele significantly influenced fat and TS percentages of milk in the Saanen goat breed. The protein (3.58%), fat (3.83%), TS (12.06%), SNF (8.60%) and casein percentages (2.80%) were higher in B3/B3 goats than in B3/NB3 (NB3: non-B3) and NB3/NB3 goats. For E allele, NE/NE (NE: non-E) goats displayed higher fat (4.06%) and TS (12.42%) percentages of milk than their E/E and E/NE counterparts. As a result, the potential for improving milk composition by selecting for B3 and E allele may be significant in Saanen goats. ______________________________________________________________________________________

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“…Contrary to our finding on the lactose content of milk for Nguni and Boer goats, some researchers have reported a decrease in lactose content in goat milk at the late lactation stage compared to the early and mid-lactation stages [36,44,45]. But, in agreement with our finding, it was observed that, lactose content in milk increased at early and late lactation [40].…”

Section: Discussionsupporting

confidence: 71%

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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Factors of variation influencing production level, SCC and basic milk composition in dairy goats

Cited by 22 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

Determining the frequencies of B1, B2, B3 and E alleles of the <i>CSN1S1</i> gene and their effects on milk yield and composition in Saanen 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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