Comparative study of breeding bulls daughters milk quality indicators

Dujina, I., Latvia Univ. of Agriculture, Jelgava; Jemeljanovs, A., Latvia Univ. of Agriculture, Jelgava ;Latvia Univ. of Agriculture, Sigulda . Research Inst. of Biotechnology and Veterinary Medicine Sigra; Konosonoka, I.H., Latvia Univ. of Agriculture, Sigulda . Research Inst. of Biotechnology and Veterinary Medicine Sigra

Comparative study of breeding bulls daughters milk quality indicators

2010

Dujina, I., Latvia Univ. of Agriculture, Jelgava (Latvia) | Jemeljanovs, A., Latvia Univ. of Agriculture, Jelgava (Latvia);Latvia Univ. of Agriculture, Sigulda (Latvia). Research Inst. of Biotechnology and Veterinary Medicine Sigra | Konosonoka, I.H., Latvia Univ. of Agriculture, Sigulda (Latvia). Research Inst. of Biotechnology and Veterinary Medicine Sigra

The aim of the work is to investigate raw milk from different bulls' daughters to clear up the influence of cows' genetic predisposition to milk microbial contamination and somatic cell count (SCC). Particular attention is paid to develop productive cow milk yield, milk fat, milk protein and in recent years, the SCC heredity. The literature describes a variety of lines and families, representatives of the resistance to certain diseases (leucosis, mastitis, tuberculosis, brucellosis, foot disease), it shows the determination of a genetic factor for this trait. If the selection results show increased resistance to a disease, then this indicates a genetic disease resistance and shy. The paper focuses on microbial contamination of raw milk at 7 different studies of bull daughters in the same line for housing, feeding and conditions of use. Raw milk samples were obtained from the breed Latvian brown (LB) from dairy cows shed of cattle shed Saujas, which belongs to SIA Palsa and is located in the civil parish Varini, Smiltene county in the year 2008/2009. Compared between the lines of bulls' daughter milk yield of the sample average value of the uniformity of variance analysis shows that they significantly differ (F=2.452, p=0.039). Comparing each line of bulls' daughters SCC of the sample average value of the uniformity of variance analysis showed that the SCC was statistically significantly different (F=2.083, p=0.075) of the various lines of bulls daughters.

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Mots clés AGROVOC

biological contamination breeds (animals) bulls calidad contamination biologique cow milk daughters fille grasa de la leche hijas lait de vache latvia leche de vaca letonia lettonie milk fat milk yield quality race (animal) razas (animales) recherche rendement laitier rendimiento lechero research somatic cell count staphylococcus taureau toro

Informations bibliographiques

Publié dans

Research for Rural Development. International Scientific Conference Proceedings (Latvia)

Numéro 16/2010 ISSN 1691-4031

Editeur

LLU

Pagination

p. 29-34

D'autres materias

Qualite; Contaminacion biologica; Numeration cellulaire somatique; Investigacion; Matiere grasse du lait; Conteo de celulas somaticas

Langue

anglais

Note

Summary (En)

1 table

4 fig., 23 ref.

Type

Conference; Summary

Source

Research for Rural Development 2010. Annual 16th International Scientific Conference Proceedings. Volume No 2, Gaile, Z..- Jelgava (Latvia): LLU, 2010. International Scientific Conference: Research for Rural Development 2010, 16, Jelgava (Latvia), 19-21 May 2010.- p. 29-34

Conférence

International Scientific Conference: Research for Rural Development 2010, 16, Jelgava (Latvia), 19-21 May 2010

Sur AGRIS depuis: 2011-04-15

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Liens

http://www.llu.lv/getfile.php?id=27927 http://www.llu.lv/?ri=5536

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