Influence of canola oil on the fatty acid profile in goats’ milk

Okine, E. K.; Goonewardene, L. A.; Mir, Z.; Mir, P. S.; Wang, Z.; Chanmugam, Prithiva

doi:10.4141/a03-003

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…The fact that in this work the milk fat content of 4:0, 6:0, and 8:0 was not decreased by dietary oil supplementation, and that the generally observed negative effects on short-and medium-chain SFA started clearly only from 12:0 upwards, except with LO, is a frequent observation in goat experiments (Okine et al, 2003;Nudda et al, 2006;Bouattour et al, 2008). However in other studies (Bernard et al, 2005(Bernard et al, , 2009cOllier et al, 2009) a decrease in milk 10:0, and even 8:0 (and less frequently 6:0) has also been documented.…”

Section: Discussionsupporting

confidence: 53%

Effects of feeding increasing dietary levels of high oleic or regular sunflower or linseed oil on fatty acid profile of goat milk

Marín

Gómez‐Cortés

Castro

et al. 2012

Journal of Dairy Science

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In this work, the effects of increasing amounts of 3 plant oils in diets on the fatty acid (FA) profile of goat milk were studied. The study consisted of 3 experiments, one per oil tested (linseed oil, LO; high oleic sunflower oil, HOSFO; and regular sunflower oil, RSFO). The 3 experiments were conducted successively on 12 Malagueña goats, which were assigned at random to 1 of 4 treatments: 0, 30, 48, and 66 (H) g of added oil/d. A basal diet made of alfalfa hay and pelleted concentrate (33:67) was used in all of the experiments. For each animal, milk samples collected after 15 d on treatments were analyzed for fat, protein, lactose, and FA composition, whereas individual milk yield was measured the last 3 d of each experiment. Oil supplementation affected neither dry matter intake nor milk production traits. Increasing the oil supplementation decreased the content of saturated FA (especially 16:0) in milk fat and increased mono- and polyunsaturated FA in a linear manner. Vaccenic acid content linearly increased with the oil supplementation by 370, 217, and 634% to 5.32, 2.66, and 5.09 g/100 g of total FA methyl esters with the H diet in LO, HOSFO, and RSFO experiments, respectively. Rumenic acid content linearly increased with LO and RSFO supplementation by 298 and 354% from 0.53 and 0.41 g/100 g of total FA methyl esters with the 0 g of added oil/d diet. The content of trans-10-18:1 was not affected by LO supplementation but showed an increasing linear trend with HOSFO supplementation and linearly increased with RSFO supplementation. The ratio of n-6 to n-3 polyunsaturated FA in milk fat was decreased by about 70% with the H diet in the LO experiment and it was increased by 54 and 82% with the H diet in the HOSFO and RSFO experiments. In conclusion, LO supplementation in this work seemed to be the most favorable alternative compared with HOSFO or RSFO supplementation.

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Section: Discussionsupporting

confidence: 53%

Effects of feeding increasing dietary levels of high oleic or regular sunflower or linseed oil on fatty acid profile of goat milk

Marín

Gómez‐Cortés

Castro

et al. 2012

Journal of Dairy Science

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“…Enteric methane (CH 4 ), one of the major GHG produced by ruminant livestock, is associated with feed intake; therefore, we might expect that low residual or net feed intake (RFI) animals, those which consume less feed for a given size and rate of gain, would produce less CH 4 than high RFI animals. This has been demonstrated in selected cattle lines (Hegarty et al, 2007) and several populations of feedlot cattle (Okine et al, 2003;Nkrumah et al, 2006). The objective of this work was to determine whether CH 4 production is associated with sire RFI breeding values or progeny RFI phenotypes in feedlot Angus cattle.…”

Section: Resultsmentioning

confidence: 99%

Heritability for enteric methane emission from Danish Holstein cows using a non-invasive FTIR method

Lassen,

Løvendahl

2014

Book of Abstracts of the 65th Annual Meeting of the European Association for Animal Production

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Introduction.Methane is an important atmospheric greenhouse gas. Around 500-600 Tg of CH 4 /yr is emitted globally. Of this, about 74% is biologically generated almost exclusively by methanogens that belong to the phylum Euryarchaeota and grouped under six orders. Ruminant methanogens generate 13-19% of global methane output which is the largest of anthropogenic emissions. Among the rumen methanogens, Rumen Cluster 'C' (RCC), an unclassified and uncultured archaeal clade, represents 15.8-80.9% of rumen archaea (Janssen and Kirs, 2008), which has the potential to contribute significantly to ruminant derived methane. Phylogenetically, RCC distantly affiliate to a non-methanogenic order -Thermoplasmatales. Analysis of 16S rDNA identified members of RCC in diverse habitats including digestive tracts of insects, birds, cattle, pigs, camels, macropod marsupials and man. However, their position as methanogens was unresolved because of a lack of pure cultures, despite methane producing, non-axenic archaeal cultures being enriched from these sites. Here, we report the isolation and characterisation of the first methanogen from the RCC clade, strain DOK-1 in pure culture, that in turn could help understand the role of this large group in the rumen. We propose the nomenclature Methanoplasma gallocaecorum strain DOK-1, for this novel methanogen. Material and methodsCaecal contents from broiler chickens were anaerobically pooled and inoculated into 10 ml Balch tubes containing anaerobic BRN enrichment media (Rea et al., 2007). Methylotrophic methanogens were enriched by adding methanol, mono-, di-and trimethylamine HCl. Cultures were grown at 39 o C under 150 kPa of 80:20 H 2 :CO 2 and monitored for CH 4 production by GC and sub-cultured every 3-5 days for several transfers. Cultures of a 10-fold serial dilution with CH 4 production at the highest dilution were further purified by antibiotics. Methanogens were also monitored by phase-contrast microscopy and a qPCR using mcrA and total bacterial primers. Finally, a persistent bi-culture consisting of a methanogen and a bacterium was obtained. Isolation was achieved by inoculation of serial dilutions of cultures into agarose containing solid media. Several, single colonies were picked and cultured in liquid media to determine purity. Genomic DNA from these cultures were amplified using archaeal 16S primers 86F-1340R; direct sequencing of PCR products confirmed sequence alignment with Thermoplasmatales affiliated novel methanogens. Nutritional and physiological requirements and morphologic features of the isolate were studied; cells in late exponential phase were freeze-dried, fixed and analysed by transmission electron microscopy. Results and ConclusionCells did not fluoresce under UV and appeared round (cocci) by both phase contrast and TEM microscopy measuring ~650-1200 nm in diameter. They are non-motile and non-flagellated with a fragile proteinaceous cell wall with no detectable S-layer. EM showed a delicate cell wall, a simple plasma membrane and a nondescript cytoplasm o...

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“…De forma geral, a inclusão de óleos ricos em ácidos graxos polinsaturados disponibiliza mais substrato para a biohidrogenação ruminal, elevando, assim, os teores de CLA no leite (Griinari et al, 1996;Kelly et al, 1997;Griinari et al, 1998;OKine et al, 2001);…”

Section: Fatores Dietéticos Ligados à Produção De Claunclassified

Levantamento exploratório da produção, composição e perfil de ácidos graxos do leite de búfalas em cinco fazendas do estado de São Paulo.

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Influence of canola oil on the fatty acid profile in goats’ milk

Cited by 4 publications

References 10 publications

Effects of feeding increasing dietary levels of high oleic or regular sunflower or linseed oil on fatty acid profile of goat milk

Effects of feeding increasing dietary levels of high oleic or regular sunflower or linseed oil on fatty acid profile of goat milk

Heritability for enteric methane emission from Danish Holstein cows using a non-invasive FTIR method

Levantamento exploratório da produção, composição e perfil de ácidos graxos do leite de búfalas em cinco fazendas do estado de São Paulo.

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