Open Science Research Excellence
@article{(International Science Index):http://waset.org/publications/24,
  title    = {Quantitative Genetics Researches on Milk Protein Systems of Romanian Grey Steppe Breed},
  author    = {V. Maciuc and  Şt. Creangă and  I. Gîlcă and  V. Ujică},
  country   = {},
  institution={},
  abstract  = {The paper makes part from a complex research project
on Romanian Grey Steppe, a unique breed in terms of biological and
cultural-historical importance, on the verge of extinction and which
has been included in a preservation programme of genetic resources
from Romania. The study of genetic polymorphism of protean
fractions, especially kappa-casein, and the genotype relations of
these lactoproteins with some quantitative and qualitative features of
milk yield represents a current theme and a novelty for this breed. In
the estimation of the genetic parameters we used R.E.M.L.
(Restricted Maximum Likelihood) method.
The main lactoprotein from milk, kappa - casein (K-cz),
characterized in the specialized literature as a feature having a high
degree of hereditary transmission, behaves as such in the nucleus under
study, a value also confirmed by the heritability coefficient (h2 = 0.57
%). We must mention the medium values for milk and fat quantity
(h2=0.26, 0.29 %) and the fat and protein percentage from milk
having a high hereditary influence h2 = 0.71 - 0.63 %.
Correlations between kappa-casein and the milk quantity are
negative and strong. Between kappa-casein and other qualitative
features of milk (fat content 0.58-0.67 % and protein content 0.77-
0.87%), there are positive and very strong correlations. At the same
time, between kappa-casein and β casein (β-cz), β lactoglobulin (β-
lg) respectively, correlations are positive having high values (0.37 –
0.45 %), indicating the same causes and determining factors for the
two groups of features.},
    journal   = {International Journal of Biological, Biomolecular, Agricultural, Food and Biotechnological Engineering},  volume    = {4},
  number    = {5},
  year      = {2010},
  pages     = {295 - 298},
  ee        = {http://waset.org/publications/24},
  url       = {http://waset.org/Publications?p=41},
  bibsource = {http://waset.org/Publications},
  issn      = {eISSN:1307-6892},
  publisher = {World Academy of Science, Engineering and Technology},
  index     = {International Science Index 41, 2010},
}