Index methods in the selection of grey karakul sheep of silver coloring

Abstract

The research was conducted on purebred grey and black Karakul sheep at the farm in Jambyl region. The research on the breeding of grey Karakul sheep of silver coloring, which would be adapted to the conditions of Zakaratausko-Moiynkum area of Jambyl region, was started in 2001. The article presents the results of the use of index methods in the selection of grey Karakul sheep (selection according to the white hair length of astrakhan) and the results of the study on the inheritance of wool homogeneity and silver coloring after homogeneous and heterogenous selection of parents by color. All selection methods showed rather high homogeneity after the selection of parents with DBV20-22 index. The indicator of white hair length of astrakhan in the selection of grey sheep contributed to the improvement of astrakhan qualities of grey Karakul sheep of silver coloring, had a positive effect on the growth and development of animals, thereby all these factors indicate the extensive use of the methods developed for improving productive and breeding qualities. The index method for the selection of grey Karakul sheep of silver coloring according to the white hair length of astrakhan within of 20-22% of the black strengthened the coloring by 12.79% and increased the homogeneity by 7.94%. The index method helped to breed two highly productive linear animals.