A NEW BIOLOGICAL CREATION OF SCIENTIFIC RESEARCH DEVELOPED IN ROMANIAN ANIMAL HUSBANDRY

C-tin Pascal, C. Cristian, C. Popescu

Abstract
    The scientific research carried out in the research-development units was intensified after 1990. Under these conditions, some new populations appeared, with distinct characters associated with some of the specific productions of sheep. During this period, Palas milk breed, Palas meat breed, Black head sheep from Teleorman, Brown variety of Karakul of Botoșani breed and the Grey line from the same breed were approved as breeds. Regarding the new sheep population formed at the Research and Development Station for Sheep and Goat Breeding, Secuieni-Bacău, the works were started in 1982 when were introduced for breeding at Luncani farm rams of Awassi breed which were used for natural and artificial breeding on a number of 114 local Rusty Țigaie sheep. In 1983, according to the Technical Report prepared by Eng. V. Caprosu et al. cited by Pascal (2018) crosses were made with 1500 Țigaie sheep from two units in Bacău County, namely SCPCO BACAU, currently SCDCOC Secuieni-Bacău, (500 sheep) and CAP Mărgineni (1000 adult sheep) and rams of Awassi breed brought from SCPCO Rușețu. During the crossing process the males obtained in F1 and R1 were sacrificed and the females with desired traits were selected in order to continue the formation process. From the R2 generation, along with the females, the males with valuable qualities (growth intensity, vigour, vivacity) with correct exterior and a robust constitution were also selected. From that moment on, the individuals R2 and R3 reproduced themselves for 4 generations (back cross), applying a rigorous selection and a directed crossing in which, in order to increase the degree of phenotypic similarity, a moderate inbreeding was used. Currently, the nucleus has been closed reproductive for over seven generations, and against this background the degree of similarity between them has increased, the production and reproduction characteristics have been very well consolidated, as well as those that confer a resistance to pedoclimatic factors specific to the training area. The new population is distinguished from other breeds with which it cohabits in the formation area, having a distinct phenodeme and genodema. Also, highlighting the differences between it and the local sheep, which dominate in the breed structure located in the training area.