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Conservation and sustainable use of animal genetic resources was the subject of United Nation Convention from Rio de Janeiro since 1992 and International Treaty regarding phytogenetical resources for food and agriculture, in Romama, the conservation of genetic fund is scientifically accepted and applied somewhat in 1960 but at the time it has a legislative support Survey carries out on 33 cows were followed: milk yield indices per successive lactation body development indices at adult animals; intrapopulation genetic structure; genetic parameters. For estimating the genetic parameters has been used REML (Restricted Maximum Likelihood) method. From the productive point of view, milk yield ranges between 1493.36 kg and 2499.14 kg with variability over 28%. The average value for the size was 122.27 cm and body weight was 575.59 kg. Different studies shows average value for milk yield of 1624 kg for a mean of 216.54 days in 1947 at "AntonPaul"-llfov farm, 2172 kg in 1959 and 2310 kg in 196O, 1976 kg in 1963 at G. A. S Laza Vaslui, 1244 kg in 1961 at G.A.C "8 Mai" Săveni, Feteşti. The heritability coefficient (h²) has average value between 0.30-0.34 for the fat and milk quantity, and in case of fat percentage it may notice a strong genetic determinism. The studied population represents a valuable genetic fund, which must be preserved and ameliorated in the way of mixed production meat-milk and developed numerically. [ABSTRACT FROM AUTHOR]

Often, for the sows's artificial seeding, literature recommends the use of a 3-5 billion mobile sperm / dose. This number is high compared with other species and is determined by the particularities of the uterus. With various techniques has tried to reduce the number of sperm \ dose without sowing depreciate results. Intrauterine insemination consists in semen laying in the uterine horn base, using a special catheter, simple and easy to handle. Avoiding the first obstacle for the spermatozoons, cervix, the method allow the spermatozoons number (insemination dose) decrease, without sow reproduction performance depreciation. Biological material was represented by Camborough primiparous and multiparous sows distributed in tow batches: · control batch (CB) -usual inseminated sows with 4 billions/dose mobile spermatozoons; · experimental batch (EB)-intrauterine inseminated sows, with 2 billions/dose mobile spermatozoons. Semen was diluted with diluent Merck III. Each sow was inseminated twice on heat cycle. Intrauterine inseminations lead to fecundity increasing (by 6,9%). Differences between groups were semnifictive (p <0.001). In both groups, the fecundity was lowest in summer season compared to others. Prolificity increase too (0,24 piglets/sow). Differences were not significant (p <0.05). Number of piglets wean was near regardless of insemination technique. [ABSTRACT FROM AUTHOR]