Browsing by Author "Popova, Teodora"
Now showing 1 - 4 of 4
Results Per Page
Sort Options
- Compositional attributes and fatty acid profile of lamb meat from Iberian local breedsPublication . Cadavez, Vasco; Popova, Teodora; Bermúdez Piedra, Roberto; Osoro, Koldo; Purriños, Laura; Bodas, Raúl; Lorenzo Rodriguez, Jose Manuel; Gonzales-Barron, UrsulaThis study aimed to compare lamb meat composition from five Iberian breeds raised in their typical rearing systems and to reveal trends in compositional meat attributes due to breed or production system. The meat quality of 153 animals was analysed. The combined effect of breed × production system produced significant differences in lamb meat quality. Meat from the extensively-reared Bordaleira-de-Entre-Douro-e-Minho (BEDM) and Gallega breeds had elevated amounts of n-3 PUFAs, tocopherol content and favourable n-6/n-3 ratio. Meat from lambs grown under extensive and semi-extensive systems presented higher content of conjugated linoleic acid than the two breeds reared intensively. The meat of commercial breed (INRA401) was characterised by higher content of protein and MUFAs and lower atherogenic potential than the breeds reared in extensive and semi-extensive systems. Principal component analysis demonstrated that meat from extensively raised lambs was associated to higher SFA, CLA, α-tocopherol, n-3, atherogenic index and cholesterol content, but lower intramuscular fat and retinol content, MUFA and n-6/n-3.
- Fatty acid composition of lamb meat from Italian and German local breedsPublication . Gonzales-Barron, Ursula; Popova, Teodora; Bermúdez Piedra, Roberto; Tolsdorf, Anna; Geß, Andreas; Pires, Jaime; Domínguez, Rubén; Chiesa, Francesco; Brugiapaglia, Alberto; Viola, Irene; Battaglini, Luca; Baratta, Mario; Lorenzo Rodriguez, Jose Manuel; Cadavez, VascoThe aim of this study was to evaluate and compare the quality characteristics, chemical composition and lipid profile of lamb meat from Italian (Biellese and Sambucana) and German (Texel-Merino-Blackhead-Charollais [TMBC]) breeds reared in extensive and semi-extensive production systems. Meat samples from 89 animals were analysed. The meat of the lambs from semi-intensively reared Biellese, and extensively reared Sambucana and TMBC breeds produced lean meat, with slightly higher intramuscular fat content in TMBC. The latter also produced meat of darker colour (P lt 0.05) and higher protein content (P lt 0.05). The meat of Sambucana lambs presented the lowest total cholesterol content (P lt 0.05). The fatty acid profile of the meat showed a clear advantage of both extensively reared breeds, which had substantially lower proportion of saturated but higher of polyunsaturated fatty acids, particularly n-3 (P lt 0.05). The beneficial effect of the extensive rearing conditions was associated with lower n-6/n3 ratio, and atherogenic and thrombogenic indices, thereby suggesting that production system can be used successfully to modify the fatty acid profile to achieve a positive effect for the human health.
- Meta-análisis del efecto del pastoreo versus la crianza intensiva en los ácidos grasos saturados en la carne de cordeiroPublication . Popova, Teodora; Gonzales-Barron, Ursula; Cadavez, VascoThe aim of this study was to measure the effect of pasture vs. indoors rearing on the content of the saturated fatty acids in lamb meat, using meta-analysis. A total of seventeen studies concerning the effect of access to pasture in lamb rearing systems on this quality trait were selected. Based on the high heterogeneity between studies, a random-effects model for assessing the data was applied. The kind of pasture (pure vs. supplemented) was considered as covariate. The model indicated that pasture rearing increased (P<0.05) the total amount of the saturated fatty acids in lamb meat. Lambs grazing pure pasture displayed increased (P<0.01) saturation of the intramuscular lipids, when compared to the animals receiving supplements such as concentrates or milk. Concerning the examined trait, the results of this study suggest certain negative effect of pasture rearing on the healthy quality of lamb meat.
- A meta-analysis of the effect of pasture access on the lipid content and fatty acid composition of lamb meatPublication . Popova, Teodora; Gonzales-Barron, Ursula; Cadavez, VascoA meta-analysis on the influence of the pasture on the lipid content and fatty acid profile in lamb meat was conducted. A total of 20 studies were selected and data on total lipid content, saturated, mono- and polyunsaturated fatty acids in lamb meat were extracted for two population groups, indoors, and pastured. Due to the high between-study heterogeneity, separate random-effects models were applied to the raw mean difference (effect size parameterization) for each of the outcomes. The results of the meta-analysis pointed that access to pasture tended to decrease the fat content in lamb, while increasing the saturated fatty acids (P < 0.05). The amounts of monounsaturated and n-6 polyunsaturated fatty acids were decreased (P < 0.05). On the other hand, grazing led to substantial increase in the content of n-3 polyunsaturated fatty acids, and decrease (P < 0.01) of the ratio n-6/n-3 in lamb meat, thus suggesting that pasture rearing can be recommended for improvement of meat dietetic quality.