Abortion, still birth, premature birth and mortality of cross bred dairy cattle (Jersey × Tharparkar/Red Sindhi) were noticed in the organized dairy farm of National Dairy Research Institute, Eastern Regional Station, Kalyani, Nadia, situated in hot and humid climatic area nearer to the river Ganges of West Bengal, India. The history of the farm revealed newly introduction of pure bred dairy cattle and outbreak of FMD during mid March to mid April, affected about 34% cross bred cows. During investigation, intermittent rise of temperature (104°F -108°F), anorexia, rapid respiration, progressive deterioration of health of animals and loss of milk production were also noticed. On the basis of past history, twenty suspected animals were taken for disease investigation. Repeated visit of the farm and repeated examinations of blood smears were done to observe any haemoprotozoan infections. Twenty to thirty percent of those suspected animals were found positive for Brucella antibodies by STAT, plate agglutination test and MRT. After a massive screening of blood smears, during the visit of third time, ultimately one animal (Identification number JT614) was found positive for the presence of Trypanosoma evansi infections in Giemsa stained blood smears. The infected and all suspected animals were successfully treated with single injection of a mixture of quinapyramine sulphate and chloride @ 7.4 mg/kg body weight subcutaneously. As a prophylactic measure, a mixture of quinapyramine sulphate and chloride @ 7.4 mg/kg body weight subcutaneously were also administered to all suspected animals prevented further occurrence of the disease in this dairy farm. It can be concluded that the iAfection with T. evansi in this farm has happened in a condition of intercurrent diseases with environmental stresses.

Prevalence and management of ovulatory disturbances was recorded from 454 repeat breeding crossbred Jersey cattle of Kashmir valley during a 7 years period (2004-05 to 2010-11). Prevalence of anovulation and delayed ovulation was recorded 16.30 and 12.78% with an overall prevalence of 29.07% ovulatory disturbances. Anovulatory animals treated with RCG (Chorulon @ 1500 to 3000 IV i.v. per animal depending on body weight) showed conception rate (CR) of 86.36%; while those treated with Buserelin (Receptal @ 5ml Lv. per animal) as 100.00%, although this difference was statistically non-significant. Animals suffering from delayed ovulation inseminated twice, thrice or 4th times depending on the persistence of estrus signs showed overall CR of 87.93%.

Research results on usage of DNA-markers (RYRI, FABP, ESRF18/FUTI) and other factors for industrial pork production were presented. It was determined that DNA-technologies let conduct interbreed crossing on industrial scale and get diverse (fat or meat, with different fat content) products, as well as increase pork production in general. The best variants of crossing combinations were pigs of the Belarus large white breed with Belarus meat and Dyurok, and also the Belarus large white breed with Landras and Dyurok. Research results showed, for in course of the whole period of breeding the daily average weight gain of hybrids of the large white with the Belarus meat and breeds Landras was higher than with the Estonian bacon on 25 and 18 g, respectively. Fattening of stores was finished at the period of achievement of body weight by 100-102,5 kg. The slaughter yield of meat products by groups (without intestinal fat) did not essentially differ and varied within 69,9 - 71,1%. There were noted no considerable distinctions in weight of internals (heart, lungs, kidneys, spleen, liver). Thickness of the salted pork fat at hybrids with animals of the Belarus meat breed was 1-2 mm lower than in other. The average meat yield of diverting weir was 61,9%, fat weight - 27,9%, bone weight - 10,2%. The organoleptic evaluation of beef-infusion broth quality showed that indicators of habit, aroma and taste and nourishing were at high level and compose 4,67; 4,59; 4,55 and 4,71 points, respectively. Tenderness, juiciness and taste of boiled meat also were at level 4,69; 4,76 and 4,87 points, respectively; fried meat - 4,57; 4,68 and 4,66 points

Influence of 33 imported heads Landrace breed boars of foreign selection on feeding performance and meat productivity of swine of the Belarusian Meaty breed was studied in the conditions of the Republic of Belarus for the enhancement of Belarusian breeds genealogical structure. There was stated the positive influence of Landrace Breed on feeding performance and meat productivity of mixed bred stores obtained after the introductive crossing with sows of Belarusian Meaty breed which was expressed in the predominancy of mixed bred hogs over the purebred ones at the stage of fattening performance test: at the age of reaching 100 kg body weight – on 0,7%; at average daily weight gain - on 1,5%; at feed consumption - on 1,2%. Mixed bred stores also had thinner back fat (on 0,9 mm) and bigger loin (on 0,4 square cm). There was stated the one-sided influence of boars of Landrace Breed on feeding performance and meat productivity indices of mixed breeds. It was established, that hybrids of four lines (Zaboj, Zalet, Zont and Bison) with regard to control groups showed the effect of heterosis at age of achievement of body weight of 100 kg, at a daily average weight gain and at forage consumption in the following rates: 1,5% (Р less than 0,05), 2,8% and 1,5% (Р less than 0,05) for Zaboj line; 2,3%, 4,9% and 2,1% (Р less than 0,01) for Zalet lines; 1,4%, 3% and 1,5% (Р less than 0,05) for Zont lines; 3% (Р less than 0,001), 6,7% and 2,7% for a line of Bison. In meat productivity indices there was stated the in-between character of inheritance which caused the decreasing of fat thickness and increasing of loin eye area at descendants of trial groups of lines: Zaboj, Zalet, Zenit, Zont on 0,88 mm (Р less than 0,05) and 0,6 square cm, 1,7 mm (Р less than 0,01) and 2,1 square cm (Р less than 0,001), 1,3 mm (Р less than 0,01) and 0,9 square cm, 1,4 mm

In the conditions of the Republic of Belarus there was realized a comparative study of meat productivity of mongrel Gereford х black-and-white heifers ad purebred black-and-white heifers in the conditions of different levels of concentrated feedstuff in cattle diets; and determine the most efficient and long-term method of animal breeding for meat. Research results showed that breeding of meaty of hybrids of Gereford х black-and-white heifers of the second generation without using the feeding concentrates in their diets or on using rations with a low rate of feeding concentrates (10-20%) proved to be more effective, than breeding of purebred black-and-white herdmates (for which specific density of the concentrated forages in diets made up 20% through pregnancy). Hybrids on Gereford breed in accordance with meat productivity level surpassed the purebred black-and-white animals. The most considerable results were marked at hybrid heifers with relative density of concentrates in a ration of 20% which in accordance with slaughter weight indexes surpassed the herdmates of black-and-white breed on 39,1 kg or on 23,68%, in accordance with slaughter yield - on 8,2%, in accordance with fresh carcass weight - on 37,9 kg or on 23,8%, in accordance with weight of inner porc - on 1,19 kg or on 20,62%.

In the conditions of the Republic of Belarus there were analyzed productivity indexes of sows of different families and family groups and their compatibility with male pigs of different lines of Belarusian meaty breed and Landras. On the basis of the realized research it was marked, that according to the number of piglets in a litter and multiple pregnancy distinctions between breeding sows of Landras breed and Belarusian meaty there was not observed. From sows of both breeds in average per farrowing there was obtain 11,0 - 11,2 piglets, including 10,4 - 10,5 live piglets, that exceeded requirements of the first class of the instruction on evaluation of pigs on 4,0 - 5,0%. At the same time, sows of the Belarusian meaty breed had litter weight at weaning in 40 days of 104 kg, that was authentically higher on 8 kg or on 8,3% (Р less than 0,001), than sows of Landras breed. In each breed there were some distinctions in sow productivity by families and in breeding with boars of different lines.

In the conditions of the Republic of Belarus there were analyzed the doses and efficiency of application of selenium in composition of a mixed fodder KP-2 in diets of bull calves of at their breeding for meat. In course of the study the was developed a formula of a mixed fodder with various doses (0,1; 0,2; 0,3 mg per 1 kg of a dry matter of a ration) of selenium; there was studied the influence of different selenium doses in mixed fodders on palatability of diets, their digestibility, use of nutritive elements and hematological indexes of animals. Also, there was analyzed the influence of different doses of selenium on bull calves growing intensity. There was given the zootechnical and economic evaluation of usage of selenium for bull calves. Selenium dose of 0.2 milligram per 1 kilogram of dry matter proved to be the most efficient and promoted the increasing of average daily body weight gain on 10.9%.

In the conditions of the Republic of Belarus there was studied the possibility of increasing of meat yield productivity of ducklings of Temp cross in the conditions application of parental lines of Peking ducks of German breeding Stolle Seddin Vital (SVV) cross. In course of the study there was realized a comparative evaluation of linear and crossbred ducklings in accordance with meat qualities and blood indexes. There were presented the results of morphological composition of liner and crossbred duck carcasses; dynamics of changes of lipid exchange (total lipids; cholesterine; triglyceride) of ducklings; morphological composition of carcasses of father and mother combinations; blood indexes of ducklings; blood indexes of crossbred ducklings of final combinations. Research results showed that crossbred ducklings had high meat properties which exceeded the purebred ones. In ducklings with lower indexes of fattiness of carcasses there was noted the lowering of concentration of total lipids, cholesterine and triglyceride in blood.

The analysis of data on a complex of reproductive qualities crossing sows has shown, that the combinations used in the classical scheme of variable crossing have appeared are less effective in comparison with the combinations including foreign meat breeds. It is recommended to change the traditional scheme of variable crossing, having excluded from it the Belarus black-motley breed and having entered foreign breeds of L and D and also to use hybrid male pigs (D x P)