scholarly journals Reducing the modifying impact of the ecological factor at breeding value assessment of Hereford bull calves taking into account phenotype and complex of genes GH and GDF5

2021 ◽  
Vol 624 ◽  
pp. 012189
Author(s):  
K M Dzhulamanov ◽  
S V Lebedev ◽  
N P Gerasimov ◽  
E B Dzhulamanov
Keyword(s):  
Ecological Factor ◽  
Breeding Value ◽  
Value Assessment ◽  
Bull Calves

Use of plasma hormone and metabolite levels to predict breeding value of young bulls for butterfat production

1984 ◽  
Vol 39 (3) ◽  
pp. 335-344 ◽  
Author(s):  
K. Sejrsen ◽  
F. Larsen ◽  
B. B. Andersen
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Plasma Levels ◽  
Selection Criteria ◽  
Plasma Concentrations ◽  
Indirect Selection ◽  
Breeding Value ◽  
Regression Analyses ◽  
Bull Calves ◽  
Ad Libitum

ABSTRACTThe purpose of the experiment was to investigate the possibility of using concentrations of hormones and metabolites in plasma of potential breeding bulls early in life as indirect selection criteria for butterfat production. Sixteen Red Danish bull calves were included in the experiment, 10 were offspring of parents selected for high butterfat production for two or three generations, and six were from parents selected for low butterfat yield. The average estimated relative breeding values of the calves in the two groups were 111 and 91.At 3·5 and 7 months of age blood samples were collected every 6 h during 2 days of ad libitum feeding, 5 days of fasting and 2 days of refeeding. The samples were analysed for glucose, urea, free fatty acids, insulin and thyroxine. At 3·5 months plasma concentrations of free fatty acids were significantly correlated with breeding value under all feeding conditions examined. The increase in plasma glucose during refeeding at both ages was positively related to breeding value. Plasma insulin during the 1st day of fasting was positively correlated with genetic merit at 3·5 months of age and negatively correlated at 7 months. Plasma thyroxine was negatively correlated with breeding value at both ages, but the correlation was only significant at 7 months. Multiple regression analyses showed that a large part of the variation in breeding value for butterfat production could be described by plasma levels of hormones and metabolites when more than one variable was included in the model. With six variables in the model 0·67 and 0·73 of the variation could be accounted for at 3·5 and 7 months of age respectively.The results of the experiment have to be considered with caution because only one sire was used per group, the parents were preselected, and the number of animals was small. The results, however, do indicate that plasma levels of hormones and metabolites in the early life of potential breeding bulls, measured after suitable physiological challenges, may be useful as selection criteria for butterfat production of their offspring.

scholarly journals Influence of degree of kinship and genetic similarity on productivity of Siberian Herefords

2020 ◽  
Vol 50 (3) ◽  
pp. 62-68
Author(s):  
B. O. Inerbayev ◽  
I. A. Khramtsova ◽  
A. T. Inerbayeva
Keyword(s):  
Genetic Similarity ◽  
Live Weight ◽  
Dispersion Analysis ◽  
Breeding Value ◽  
Bull Calves ◽  
Number Of Factors ◽  
Hereford Cattle ◽  
G 11 ◽  
Meat Productivity ◽  
Selection Of

The results of studying the influence of the degree of kinship and genetic similarity of parental pairs on meat productivity of Hereford cattle are presented. An increase in homozygosity in herds of Hereford cattle in Siberia may reduce the effectiveness of breeding work. It was found that the selection of parental couples had a significant effect (p < 0.01–0.001) on the formation of offspring meat productivity. Cows from distant inbreeding and outbred (unrelated) parents were superior in live weight by 31–47 kg at the age of 3 and 5 years compared to closely related ones. The highest live weight ratios (16–66 kg) were observed in young animals obtained from outbred selection of parental couples compared to their peers obtained from closely related mating. Bullcalves from 8 to 15 months old, obtained from mating of unrelated parents, exceeded their peers from closely related mating by 105 g (14%), moderately related – by 87 g (11%) and distant by 69 g (9%). Low values of this indicator for the age-group of up to 18 months result from a large number of factors (genotype, maternal milk production, housing conditions) in the initial stage of organism formation. Bull-calves and heifers with an average degree of genetic similarity of parental couples at all ages had better live weight compared to their peers, due to heredity formed from both parents. A dispersion analysis of the data established a reliable effect (p <0.001) of the degree of genetic similarity of the parental pairs on the amount of live weight. The study of the degree of kinship and genetic similarity of parental pairs will allow to obtain the most accurate and reliable data on the breeding value of Hereford cattle of Siberian selection.

BREEDING VALUE ASSESSMENT OF VARIOUS INBREED TYPES OF VLADIMIR DRAFT HORSES

2020 ◽  
Keyword(s):  
Gene Pool ◽  
Breeding Value ◽  
Distribution Area ◽  
Point System ◽  
Main Body ◽  
Value Assessment ◽  
Body Type ◽  
The Past ◽  
T Distribution

Vladimir draft horse belongs to the group of breeds with limited gene pool and threatening status, since the total number of mares in the breed is no more than 200 heads. Vladimir breed horses are distinguished by endurance, ambitiousness, beauty and harmonious forms, good mobility and meet all modern requirements of a draft horse. The limited number of livestock and t distribution area leads to the use of inbreeding, which affects the quality of horses. Nowadays, two original inbreeding types have formed in the breed, characterized by typological features: Yuryev-Polsky and Gavrilovo-Posadsky. The aim of our work was to evaluate the breeding qualities of Vladimir draft horses of various internal breeds, to determine the best lines andfamilies for further breeding and increase the number of breeds. As a result of the research, a change in the number of horse stocks over the past 40 years was analyzed; differences in the development of the main parameters and body type of these inbred types during evolution were established. A qualitative analysis of the breeding value of pedigree types is carried out. For this purpose, the typicality of horses, the exterior and the constitution according to the point system were evaluated. The main body indices (format, mass and bones) were calculated, and a differential assessment of tallness and bones was carried out. Evaluation of Vladimir breed mares by categories of breeding value showed that the largest number of horses of the 1st class was in Yuryev-Polsky inbreed type.

scholarly journals Genotypical features of the exterior development of Hereford bull-calves

2020 ◽  
Vol 164 ◽  
pp. 06024
Author(s):  
Vladimir Kolpakov ◽  
Aleksey Ruchay ◽  
Kinispay Dzhulamanov ◽  
Nikolay Gerasimov
Keyword(s):  
Linear Growth ◽  
Live Weight ◽  
Breeding Value ◽  
Economic Research ◽  
Bull Calf ◽  
Group Iii ◽  
New Methods ◽  
Bull Calves ◽  
New Criteria ◽  
Domestic Breeding

An analysis of previous years shows that there is a gradual increase in the rate of breeding and pedigree work, its intensification, which is caused primarily by the implementation of new methods of biotechnology and population genetics. In this regard, the improvement and development of new criteria for cow evaluation taking into account created highly productive lines, types, and populations are relevant for science and practice. There was carried out scientific and economic research in order to characterize the main indicators of the breeding value of cows that belong to the created hornless Ural-type Hereford breed of domestic breeding. The influence of these indicators on the formation of the productivity of bull-calf progenies fell under the characterization as well. There were formed five groups of full-aged cows (5-8 years) different in productive qualities to determine the influence of the productive value of mother cows on the pedigree and productive qualities of progenies. Cows of all groups were inseminated by the deep-frozen seed of Hereford bull of the “elite-record” class produced by Golub 4168. Five groups of experimental bull-calves were formed by the method of groups-analogs from the resulting progeny. The analysis of weight and linear growth of the progeny bull-calves showed that all the animals normally developed being characterized with the general patterns of ontogenesis. At the same time, bull-calf progenies of cows different in productive value were inherent in some features - the average live weight of bulls of group III was larger than those of its peers from groups I, II, IV, and V by 27.4 kg (6.3 %, P>0.95), 64.1 kg (16.1 %, P>0.999), 28.9 kg (6.6 %, P>0.95), and 47.4 kg (11.4 %, P>0.999), respectively.

scholarly journals Effect of Some Factors on Performance Value Assessment of Stallions During Performance Tests

2016 ◽  
Vol 16 (4) ◽  
pp. 1175-1184
Author(s):  
Sławomir Pietrzak ◽  
Tomasz Próchniak ◽  
Katarzyna Kozak-Jurek ◽  
Angelika Zapała
Keyword(s):  
Performance Test ◽  
The Body ◽  
Breeding Value ◽  
Statistical Characteristics ◽  
Value Assessment ◽  
Training Centre ◽  
Factors Affecting ◽  
Average Value ◽  
And Performance ◽  
The Individual

Abstract Breeding value of sport horses in Poland is estimated on the basis of, among others, results of the 100-day performance test of young stallions in the training centres. However recently, a drastic decrease has been reported in the number of stallions undergoing this way of assessment in Poland with an increase in foreign breeds in equestrian competitions. The objective of the study was to determine variability level of stallion traits evaluated in the training centres and to identify factors affecting stallion performance value assessment during the stationary performance test. The study included 503 stallions subjected to the 100-day training followed by the performance test in the years 2004-2013 at the training centres. There were computed statistical characteristics of 16 performance traits which were scored by the trainer of the training centre, judging commission and test riders. Influence of identified factors on each evaluation was established using the GLM procedure. The rank correlations served to estimate phenotypic interdependencies between the scores and performance value indices. It was stated that the studied group of stallions showed low variation within the body basic measurements and the conformation correctness evaluated on the 100-point scale was also found within an average value (78.86 pts), quite close to minimum value for young stallions in Poland (78 pts). The highest variation was observed for the scores given by the test riders and the main factor differentiating the performance value of horses was their origin-breed group. The horses of the German breeds (HANN, OLDBG, HOLST) earned the highest scores, while Wielkopolska horses got the lowest scores for performance test. Insufficient consistency between the individual evaluation made by the trainer of training centre and the judging commission may imply completely different period of assessment (trainer - 100 days, judging commission - 2 days) or unsatisfactory competencies of examiners.

"Ecological Factor on Attitude Towards Development"

2012 ◽  
Author(s):  
Pooja B. Chovatiya ◽  
Yogesh A. Jogsan
Keyword(s):  
Ecological Factor

INFLUENCE OF HIGH-PROTEIN FEED ADDITIVE ON THE PRODUCTIVITY OF THE MEAT BULL-CALVES

2019 ◽  
Vol 2019 (3) ◽  
pp. 6-11
Author(s):  
Батырхан Абилов ◽  
Batyrkhan Abilov ◽  
Лариса Пашкова ◽  
Larisa Pashkova
Keyword(s):  
Hematological Parameters ◽  
Physiological State ◽  
Average Daily Gain ◽  
Live Weight ◽  
Feed Additive ◽  
North Caucasus ◽  
Agricultural Enterprise ◽  
Bull Calves ◽  
Economic Indices ◽  
High Level

The article presents the data obtained as a result of carrying by employees of the Research Institute of sheep and goat breeding, a branch of the FSBSI "North Caucasus FARC", the scientific and economic experience to study the efficiency of a new fodder additive "Organic" on the productive and physiological indices of bull-calves during the completion of growing in the conditions of the farm "Pata" agricultural enterprise in the Karachay-Cherkessia Republic. The statement of the experience and all researches were carried out according to generally accepted methods. In the course of the experiment, the following indices were studied: the chemical compound of forages, the dynamics of a live weight gain in the experimental stock, hematological parameters, control slaughter data, economic indices. Completed researches have shown positive result from the use of the fodder additive "Organic" in bull-calves diets: an increase in the average daily gain of live weight by 25%, a slaughter yield by 1% and a high level of profitability – 27%. Thus, the additional introduction of "Organic" in a diet of young horned cattle in the 2nd experimental group promoted more intensive metabolism, stabilization of a physiological state, increase in productivity and, as a consequence, profitability of beef production. Researches in this direction reveal the latent fodder reserves promoting increase in the productivity of agricultural animals.

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