Baltenweck, Isabelle

Ema, P.J.N.

Juga, J.

Lassila, L.

Marshall, Karen

Missohou, Ayao

Poole, Elizabeth J.

Tapio, M.

Tebug, Stanly Fon

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16 MTT SCIENCE 26Milk Composition of Dairy Cattle Breeds in Senegal Patrick Jolly Ngono Ema1,2, Karen Marshall3, Stanly Tebug3, L. Lassila2, Jane Poole3, Isabelle Baltenweck3, Miika Tapio4 , Jarmo Juga2, Ayao Missohou11Inter-state School of Veterinary Science and Medicine of Dakar (EISMV), P.O. Box 5077, Dakar (Fann), Senegal 2School of Veterinary Medicine and Science, University of Ngaoundere, P.O.Box 454 Ngaoundere,Cameroon 3International Livestock research Institute (ILRI), P. O. Box 30709 Nairobi 00100, Kenya 4Department of Agricultural Sciences, University of Helsinki, P.O. Box 28, 00014 Helsinki, Finland 5MTT Agrifood Research Finland, Biotechnology and Food Research, Jokioinen FI-31600, FinlandE-mail: p.jollyema@gmail.com AbstractMilk is rich in protein, energy and essen-tial micro-nutrients and its availability con-tributes to food and nutrition security. To improve milk production, mostly in terms of quantity but also in terms of quality, in Senegal, cross-breeding traditional breeds (such as the Zebu Gobra) with newly in-troduced breeds (Guzerat, Holstein Frie-sian, and Montbeliard, amongst others) has become common in some regions. This study takes place in the general frame-work of the project, ”Senegal Dairy Genet-ics”.  The overall objective of the project is to determine the most suitable dairy cat-tle breeds for low-input, small to medium scale, dairy producers’ households in Sen-egal. The present study contributes to this overall objective by determining and com-paring the milk composition of the vari-ous dairy cattle breeds found within the project sites. Milk samples were collected from 241 lac-tating dairy cows belonging to 97 house-holds in two regions of Senegal (Thies and Diourbel), during the period September to December 2013 which is the wet sea-son when feed availability is high. Animals were classed into 4 groups based on their breed-type: group 1 comprising animals that are pure-bred ancient Zebu (such as the Zebu Gobra and Zebu Maure), group 2 comprising animals that are 75% ancient Zebu and 25% recently introduced Zebu (such as Guzerat), group 3 comprising an-imals that are 50% ancient Zebu and 50% recently introduced taurine (such as Hol-stein Friesian and Montbeliard), and group 4 comprising animals that pure-bred re-cently introduced taurines. The number of milk samples per group was 132, 38, 56 and 15 for groups 1, 2, 3 and 4, respective-ly. The milk component analyses were car-ried out in the field, using a portable milk analysing device (Lactichek Analyzer®). Re-sults were obtained for the percentages of fat, solids-not-fat (SNF), protein and lac-tose; density and freezing point were also obtained. Each sample was analysed three times for machine repeatability and the av-erage of these measures was used. The dif-ferent groups were compared using Stu-dent’s t-test in SPSS® 20 software. Across all groups, average percentag-es (±SD) of 5.05±1.56; 9.86±0.60; 3.65±0.21; 5.47±0.31 were obtained for fat, SNF, protein and lactose, respective-ly. The milk content of cows in group 3 versus 4 clearly differed by all their com-ponents (p<0.05). Conversely, the milk of cows in group 1 and 2 was very similar in all their components. These latter differed from cows in group 3 only by their fat content; a higher level of fat content was found for animals of group 3 (5.75±1.89). Cows of group 3 also had the lowest lev-els of both SNF (9.53±0.57) and protein (3.52±0.21). The four dairy cattle breed groups derived from this study differ with regards to their milk composition.Keywords: Dairy cattle, Crossbred, Milk composition, Senegal

Milk composition of dairy cattle breeds in Senegal

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Milk composition of dairy cattle breeds in Senegal

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