The article discusses new recessive genetic defects of Holstein cattle associated with embryonic and early postembryonic mortality, which were named «fertility haplotypes».
Keywords: DNA technologies, selection and breeding work, embryonic and early postembryonic mortality, fertility haplotypes, stud bulls, cow, calf, dairy cattle sector, metabolic stress, transit period, Holstein cattle, reproductive ability of cows, mutant allel.
For successful animal breeding, improvement of the existing breeds and early forecasting of the future productivity of dairy cattle, interrelation between milk yields and blood biochemical indicators are studied as they directly influence the process of lactogenesis.
Keywords: dairy cattle production, selection, enzymes, blood serum, correlation, breed, cow, productivity, biochemical blood indicators, lactogenesis, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase, lactic dehydrogenase, sorbitol dehydrogenase, cholinesterase, amylase, γ-glutamine transferase, genes, DNA, proteins, milk yield, metabolites, daughter cows, father bulls, improvers, lactation, feeding.
Breeding value of the Large White pig was assessed for replacement gilts using indicators of own productivity and for sows for reproductive qualities as well for the degree of correlation between the signs with low heritability estimate.
Keywords: pig production, replacement gilts, sows, Large White breed, breeding value, animal assessment, BLUP method, macrocarpous, reproductive qualities, prolificacy, nest uniformity, live weight, daily average gain, L.Lash indexes as modified by N. Berezovsky, correlation relationship.
Genetic potential of pigs of contemporary breeds is realized by competent feeding of animals and creation of optimum housing conditions.
Keywords: pig production, pigs, gene fund, genetic potential, paternal and maternal forms, selection, nucleus, genotype, additive effect of the action of genes and heterosis, mongrel offspring, selection, productivity, blood relationship of offspring, hybrid, half-blood, heredity, fruitfulness, Duroc, Large White pig, Landrace, Pietrain, correlation relation, population, prolificacy, piglet, breed line hybridization, sow, pig weaning, superdomination, inter-breed crossing, nest weight, back crossing and absorption crossing.
It is reasonable to fertilize Large White thoroughbred sows and mongrel individuals LB×L with sperm of hybrid male pigs of L×D and D×P genotypes to receive mongrel young animals adapted for growing in the conditions of industrial technologies, in carcasses of which the fat layer is thinner, the rib eye area is larger, the gammon is heavier, and the meat content is greater.
Keywords: pig production, pigs, sow, male pig, piglet, yelt, intra-breed improvement, selection, inherited traits, prolificacy, productivity, milkiness, survival, breed, crossing, Large White breed, Duroc, Landrace, Pietrain, thoroughbred individual, two- three- and four-breed, mongrel offspring, pork, breed, fattening, farrowing, live weight, artificial insemination, reproductive qualities, estimate index of reproductive traits, composite indicator of reproductive qualities, weaning, effect of heterosis, mating, daily average weight gain, pork fat, gammon, carcass, rib eye, genotype.
It was experimentally proved that thoroughbred Tuklin pigs are better adapting for changing feeding conditions than hybrid animals.
Keywords: pig production, pigs, yelts, thoroughbred, hybrid, Tuklin breed, Yorkshire, Landrace, Duroc, selection, feeding, feed, diet, digestibility of nutrients, coefficient, total nutrient value, solids, organic substance, protein, fibre, fat, nitrogen-free extractive substances, ash, average daily gain, live weight.
Based on the data on pig growth rates in the first months of life, more accurate forecast of the trend of their development at older age is possible. Pig growth up to eight months is mostly governed by large size and weight of animals at an age of four month.
Keywords: animal breeding, pig production, piglet, productivity, phenotypic assessment, correlation relationship, growth energy, growth intensity, breeding value, live weight, genotype, large size of litter, weaning, growth uniformity and intensity index, replacement young animals.
Interview with Natalya Kazmina, Director of Selection and Hybrid Center LLC (Voronezh Region).
Keywords: Selection and Hybrid Center LLC, breeding pig stock, thoroughbred animals, Large White, Landrace, Duroc, hybrid population, Russian Selection and Hybrid Centers, sow, pig factory farm; phenotypical, index and genetic assessment; prolificacy, pig growth rate, depth of loin eye, valuation, farrow, marker selection, boar testing for average daily gain and feed conversion.
Semex offers milk producers the Immunity+ technology that guarantees herd health improvement and increases profit on investment.
Keywords: dairy cattle production, bull, cow, calf, Immunity+ technology, Genomax bulls (high genomic bulls), Immunity+ bulls, genetics, genomic selection, genomic assessment, herd, population, pneumonia, diarrhea, metritis, placenta detention, mastitis, ketosis, insemination, immune response, milk, culling, vaccine, antibodies, colostrum, productivity, heritability, Holstein breed, bulls’ semen, bulls’ daughters, top bull, milk yield, somatic cells, GTPI index, bull rating, vaccination, heifer, company Semex.
The animal breeding staff of the Moskovskoe OJSC has been involved in assessment and improvement of the exterior of dairy cattle in Moscow Region for two decades, and by now they have achieved considerable results.
Keywords: dairy cattle production, animal breeding, selection, breeding farm, cattle, dairy cattle, cows, first-calf heifers, stud bulls, linear assessment of the type of constitution, 100-point system of exterior assessment, assessment of animal grade, productivity, bulls matching.
Stable yields of milk even at diet reduction, animal longevity, precocity, high fat and protein content in milk distinguish Ayrshire cows from other breeds. The article describes specific features of feeding and housing these animals in southern regions of Russia.
Keywords: dairy cattle production, cows, first-calf heifers, Ayrshire breed, Ayrshires, productivity, fat, protein, cheese production, feeding, housing, diet, feed, premixes, mineral substances, environmental conditions, south, southern region.
Production of lard pigs is an important reserve for improving nutritional value of human diet. Comparative analyses show that Russian breeds of animals do not at all come short to foreign breeds in fat quality.
Keywords: pig production technologies, salted pork fat, lard fattening, lard fat, lard breeds of pigs, production of fat pork, selection, pig production.
It was found that first-litter sows do not come short to their contemporaries with two and more farrowings in terms of prolificacy, but surpass them in milking capacity and piglet survival by the time of weaning.
Keywords: piglet feeding, reproductive qualities of sows, gestation period, productivity, prolificacy, pig, sow, nest weight, pig production.
Russian pig breeds were created as a result of long selection for effective assimilation of locally produced feed. These animals have elevated growth rate and good feed conversion, and their meat possesses excellent palatability qualities and high nutritional value.
Keywords: meat quality, feed reserve, biological value of pork, antibiotics, vitamin A, biostimulators, Russian pork producers, high-calorie meat food, Russian pig breeds, lard fattening, suckling pigs, meat dishes.
One of the major factors for successful development of pig production sector is use of the best world gene fund and improvement of animal breeding value assessment methods. Research results give grounds for recommending the staff of stud farms and nuclei to assess and select sows using index assessment.
Keywords: selection, gene fund, genotype, genetic potential, population, pig production, sow, Large White, Landrace, weaning, general selection index (GSI), modified index (Im), reproductive fitness index (RFI), prolificacy, discretisation, breeding value, survival rate.