Contributions to the Study of Sura de Stepa Cattle Breeds

Authors

  • Vasile Maciuc "Ion Ionescu de la Brad" University of Agricultural Sciences and Veterinary Medicine – 700490 Iasi, Mihail Sadoveanu Alley, 3, Romania
  • Șteofil Creangă "Ion Ionescu de la Brad" University of Agricultural Sciences and Veterinary Medicine – 700490 Iasi, Mihail Sadoveanu Alley, 3, Romania
  • Ioan Gîlcă "Ion Ionescu de la Brad" University of Agricultural Sciences and Veterinary Medicine – 700490 Iasi, Mihail Sadoveanu Alley, 3, Romania

Keywords:

breed, heritability, lacto-proteins, milk, Sura de Stepa, preservation

Abstract

Sura de Stepa breed, which is on the verge of extinction, has been included in a preservation programme for animal genetic resources (H.G. nr. 822/2008), being raised in a reduced nucleus at S.C.D.C.B. – Dancu, Iasi. Researches were carried out on a number of 30 Sura de Stepa cows, focused on: milk production indicators by successive lactations, genetic determinism at the studied characters and at main lacto-proteins systems, the improvement value of breeding. The quantity of milk per normal lactation at Sură de Stepă population from S.C.D.C.B. – Dancu Iasi, has an upward evolution from 1589.64 kg in the first lactation to 2535.43 kg in the fifth lactation which is also the maximum one. First lactation represents 62.69% from maximum lactation, a value which highlighting the tardiness of Sura de Stepa breed in terms of milk production. Heritability analysis of the studied indicators show medium values for the quantity of milk and fat respectively a hereditary influence greater than h2 = 0.71% for percentage of milk fat and h2 = 0.57% for kappa–casein (K-cz) from milk. Lacto-proteins systems, beta-lacto globulin (b-lg), beta-casein (b-cz), alpha-casein S1 (aS1-cz), have a low to intermediate heritability (0.19 to 0.29%)

References

Grosu, H., Lungu, S., Kremer, V. Modele liniare utilizate în ameliorarea genetică a animalelor. Edit. Coral Sanivet, Bucureşti, 1997, pp. 87-95

Maciuc V., Ujică V., Nistor I. : Ghid practic de ameliorare genetică a bovinelor pentru lapte. Editura Alfa, Iaşi, 2003, pp. 206-264

Maciuc V., Creangă Şt., Pîntea M. : Ameliorarea genetică a bovinelor în regiunrea transfrontalieră. Editura „Ion Ionescu de la Brad”, Iaşi, 2008, pp. 166-175

Hotarârea de Guvern nr.822/2008.

Creangă Şt., Maciuc V., Pîntea M., Gîlcă I., Danaila R.: – Romanian Grey Steppe cattle breed in the context of genetic resources preservation in Romania. 3-rd International Symposium, 18-20 September, University of Technology and Life Sciences in Bydgoszcz, Poland. Book of abstract. Journal Central European of Agriculture, 2008

E. E. Wildman, G. M. Jones, P. E. Wagner, R. L. Boman : A Dairy Cow Body Condition Scoring System and Its Relationship to Selected Production Characteristics. Journal of Dairy Science Vol. 65 No. 3 495-501, 1982

Mercier, J. C., şi colab. :Génétique moléculaire des protéines du lait et de leurs gènes. Biologie de la lactation. Éditions INRA., 1993

Ribadeau-Dumas, B. : Protèines du lait i structure et fonctions. Biologie de la lactation. Édition INRA, 1993

Reference to electronic publications:

Gengler N., A Tijani, and G.R. Wiggans and I. Mistztal (2000). Estimation of (co)variance function coefficients for test day yeld with a Expectation Maximization Restricted Maximum Likelihood Algorithm.

http://12.24.208.139.manuscripts/8436e/.

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Published

2023-10-03

Issue

Section

Technologies Applied in Animal Husbandry