scholarly journals Investigation of the effect of certain paragenetic factors on fertility traits of bull dams of Simmental breed

2005 ◽  
Vol 21 (3-4) ◽  
pp. 35-41 ◽  
Author(s):  
Vlada Pantelic ◽  
Zlatko Skalicki ◽  
D. Latinovic ◽  
Milan Petrovic ◽  
Denis Kucevic
Keyword(s):  
Least Squares ◽  
Reproductive Traits ◽  
Objective Evaluation ◽  
Agricultural Producers ◽  
Mean Values ◽  
Service Period ◽  
General Average ◽  
The Republic ◽  
Fertility Traits ◽  
Duration Of Pregnancy

Investigation included bull dams of Simmental breed selected on farms of agricultural producers on the territory of the Republic of Serbia. Method of Least Squares - LSMLMW (Harvey 1987) was used for analysis of the effect of region and order of lactation on reproductive traits. Obtained results indicate the justification for investigation of paragenetic factors, since the knowledge of their effect can contribute to more objective evaluation of random effects. Regions had highly significant effect (P<0,01) on age at first conception, duration of service period and interval between calvings whereas no significant effect on duration of pregnancy was registered (p>0.05). The effect of region of breeding many factors are included and most important one is nutrition. Order of lactation as second factor investigated in this research had no effect on any of the fertility traits (p>0.05). General average of mean values of least squares for fertility was: for age at first conception 517.61 days, duration of pregnancy 285.51 days, duration of service period 108.98 days, interval between calving 395.34 days.

scholarly journals Reproductive characteristics of Simmental breed bull dams

2005 ◽  
Vol 21 (1-2) ◽  
pp. 13-20 ◽  
Author(s):  
Vlada Pantelic ◽  
Zlatko Skalicki ◽  
Milan Petrovic ◽  
Denis Kucevic
Keyword(s):  
Reproductive Traits ◽  
Dairy Production ◽  
Method Of Least Squares ◽  
Agricultural Producers ◽  
Mean Values ◽  
Service Period ◽  
General Average ◽  
Cattle Reproduction ◽  
Significant Production ◽  
Duration Of Pregnancy

Cattle reproduction is most significant production phase because in this phase heads of cattle for maintaining of the herd are provided, as well as for dairy production and fattening - production of meat. The effect of year and season of calving on age at first conception, duration of pregnancy duration of service period, interval between calving, etc. is investigated in the paper. Bull dams of Simmental breed selected on farms of individual agricultural producers were investigated. The method of Least Squares LSMLMW(Harvey 1987) was used for analysis of the effect of year and season of calving on reproductive traits. Year of calving had significant effect on duration of service period and interval between calving (p<0.05), while season influenced significantly only the duration of service period (p<0.05). Mean values of the general average were following: for age at first conception - 517.61 days; duration of pregnancy 285.51 days; duration of service period 108.98 days; duration of interval between calving 395.34 days.

scholarly journals Phenotypic correlations of productive and reproductive traits of Simmental cows

2007 ◽  
Vol 23 (3-4) ◽  
pp. 11-17
Author(s):  
Vlada Pantelic ◽  
Z. Skalicki ◽  
M.M. Petrovic ◽  
S. Aleksic ◽  
B. Miscevic ◽  
...  
Keyword(s):  
Milk Fat ◽  
Reproductive Traits ◽  
Phenotypic Correlation ◽  
Cattle Breeding ◽  
Phenotypic Correlations ◽  
Service Period ◽  
Calving Season ◽  
The Republic ◽  
One Year ◽  
Fertility Traits

Research included 3.461 first calving Simmental cows in control, with lactations concluded within one year. All first calving cows were reared by private/individual farmers on the territory of the Republic of Serbia. Phenotypic correlations between following milk and fertility traits have been investigated: duration of lactation DL, milk yield MY, milk fat content MFC, milk fat yield MFY, yield of 4% FCM, age at first calving AFC and duration of service period DSP. Results of the investigation of phenotypic correlations are obtained using mixed models LSMLMW (Harvey 1990). This method enables optimal consideration of numerous effects on investigated traits (bull sires, region, calving season, and calving year). Phenotypic correlation of traits in cattle breeding relates to presence of mutual positive or negative covariance which is result of the effect of genetic and factors of the environment. Information on phenotypic correlations between milk and fertility traits can be of great importance in selection of cows, since it provides possibility to choose/select heads based on several traits at the same time. .

scholarly journals Inheritance of some fertility traits in three successive generations of Holstein-Friesian cattle

2005 ◽  
Vol 48 (1) ◽  
pp. 5-11
Author(s):  
R. Lazarevic ◽  
B. Miscevic
Keyword(s):  
Reproductive Traits ◽  
Service Period ◽  
Holstein Friesian ◽  
Successive Generations ◽  
Fertility Traits ◽  
Friesian Cattle ◽  
Duration Of Pregnancy

Abstract. The aim of the paper was to establish reproductive traits and their heritability during the three successive generations of Holstein-Friesian cattle. Research was conducted on the duration of pregnancy, service period and fertility intensity. In each generation there were 135 first calved cows. Service period and fertility intensity refers to the following calving. Significant differences were established (P < 0.05) regarding duration of pregnancy between I and II generation. Significant (P < 0.05) influence of season on duration of pregnancy and service period was established in I generation (1991), on duration of service period and fertility intensity in II generation (1996) and on duration of pregnancy and service period in III generation (2000). Season effect (summer) was established for all traits of fertility in II generation (P < 0.05). The season (spring) had influence on duration of pregnancy (P < 0.05) and summer had an influence on duration of service period and fertility intensity, and winter effected the duration of service period (P < 0.05) in III generation. Values of heritability coefficients are pretty low for all generations. Considerably greater values for heritability were established for service period and intensity of fertility of cows per generations.

scholarly journals Phenotypic and genetic parameters of reproductive traits of black and white cows with different share of HF genes

2007 ◽  
Vol 23 (5-6-1) ◽  
pp. 193-199 ◽  
Author(s):  
M.M. Petrovic ◽  
S. Aleksic ◽  
T. Smiljakovic ◽  
V. Pantelic ◽  
D. Ostojic-Andric
Keyword(s):  
Genetic Parameters ◽  
Mixed Model ◽  
Reproductive Traits ◽  
Genetic Group ◽  
Milk Traits ◽  
Black And White ◽  
Service Period ◽  
White Breed ◽  
General Average ◽  
Fertility Traits

In this paper, results of the effect of direct and indirect selection of quantitative fertility traits of cattle end heritability level are presented. Study of the quantitative genetic parameters was carried out on three large farms of Black and White, Holstein-Friesian cattle. Investigation included 3900 first calving cows, daughters of 54 bull sires. The effect of genetic group of the head of cattle (genotype) and of the herd on fertility and milk traits of heifers and first calving cows of Black and White breed was investigated. Genetic group of the head of cattle (genotype) had no significant effect in variation of the fertility traits compared to general average (P<0.01). The effect of herd caused statistically significant and highly significant deviation from the general average, P < 0.05 and P < 0.01. Established heritability coefficients for fertility traits had low values for age at insemination (0,112), duration of pregnancy (0,045) and duration of service period (0,097). Results were obtained by applying mathematicalstatistical analysis of data - using mixed model (Harvey, 1990). Mathematical-statistical analysis of data was carried out using linear methods with fixed influence through model of Least Squares (LS method). Genotype of the head of cattle caused no significant deviation of fertility traits (P>0,05).

Genetic analysis of fertility traits in Jersey crossbred cows

2017 ◽  
Author(s):  
Anshuman Kumar ◽  
Ajoy Mandal ◽  
A. Gupta ◽  
M. Karunakaran ◽  
S. Das ◽  
...  
Keyword(s):  
Management Practices ◽  
Genetic Relationships ◽  
Random Effect ◽  
Reproductive Traits ◽  
Calving Interval ◽  
Genetic Progress ◽  
Factors Affecting ◽  
Service Period ◽  
Parity Number ◽  
Fertility Traits

The present study was carried out to evaluate the genetic and non-genetic factors affecting fertility traits viz., number of service per conception (NSPC), service period (SP) and calving interval (CI) and genetic and phenotypic parameters of these traits in Jersey crossbred cattle, maintained at Eastern Regional Station of ICAR-National Dairy Research Institute, Kalyani, West Bengal over a period of 39 years (1976-2014). The least squares means for the NSPC, SP and CI were 1.73±0.08 inseminations, 156.37±7.47 days and 458.32±9.56 days respectively. The study revealed that all the traits were decreasing significantly with parity number. Season was important in determining service period, whereas period of calving influenced calving interval in this study. NSPC, SP and CI did not differ significantly among different genetic groups; but, half-breds of Jersey and Tharparkar (½ Jersey-½ Tharparkar) showed comparatively lower NSPC, SP and CI than half-breds of Jersey and Red Sindhi and other crosses in this study. The random effect of sire was highly significant on all the fertility traits considered in this study. Heritability estimates for NSPC, SP and CI were 0.08±0.06, 0.18±0.08 and 0.16±0.08 respectively. All the three analyzed traits had close genetic relationships. Low to moderate heritability of reproductive traits indicates slow genetic progress through selection and further improvement in reproductive performance can be made either by better management practices or including large number of polymorphic markers associated with fertility in the population to assist animal selection

scholarly journals The effect of paragenetic factors on reproductive traits of simmental cows

2007 ◽  
Vol 23 (5-6-2) ◽  
pp. 1-8
Author(s):  
M.D. Petrovic ◽  
Z. Skalicki ◽  
V. Bogdanovic ◽  
M.M. Petrovic
Keyword(s):  
Birth Weight ◽  
Reproductive Traits ◽  
Gestation Length ◽  
Gender Interaction ◽  
Regression Effect ◽  
Service Period ◽  
Calving Season ◽  
Fertility Traits ◽  
Effect Of Age ◽  
Birth Type

The examination was made on the effect of systematic factors (parturition group, calving season, birth type, calf gender, and birth type-calf gender interaction) and age at first conception on the expression of reproductive traits (gestation length, service period, fertility intensity and calf birth weight) in 143 Simmental cows. The overall mean (?) for gestation length, service period, intercalving period and calf birth weight was 284.14 days, 153.82 days, 416.92 days and 35.40 kg, respectively. The parturition group effect on all fertility traits was highly significant (P<0.01). The calving season statistically significantly (P<0.05) affected the intercalving period and calf birth weight. Birth type induced very significantly longer gestation (P<0.01) and higher calf birth weight in singles (P<0.01) and significantly longer service period in twins (P<0.05). Calf gender had a very significant effect (P<0.01) only on calf birth weight, and the interaction between birth type and calf gender significantly affected gestation duration only (P<0.05). The regression effect of age at first conception on all fertility traits was not significant (P>0.05).

scholarly journals Phenotypic correlation of traits of production and reproduction of Simmental cows in different regions of Serbia

2019 ◽  
Vol 35 (3) ◽  
pp. 219-228
Author(s):  
Vlada Pantelic ◽  
Dragan Niksic ◽  
Nevena Maksimovic ◽  
Dusica Ostojic-Andric ◽  
Marina Lazarevic ◽  
...  
Keyword(s):  
Milk Fat ◽  
Breeding Value ◽  
Phenotypic Correlation ◽  
Agricultural Producers ◽  
Phenotypic Correlations ◽  
Service Period ◽  
Milk Performance ◽  
Breeding Selection ◽  
The Republic ◽  
One Year

The main goal of this research was to examine, using modern methods, the variability of phenotypic correlations of production performances and reproductive properties of Simmental cows reared on the farms of individual agricultural producers, in different breeding areas of the Republic of Serbia. The study of phenotypic correlations of milk performance and fertility properties in different regions of Serbia was carried out on a total of 3.056 primi parous Simmental heifers under control, with lactations completed within one year. The examined animals were reared on different individual farms, and mainly in very different conditions of housing and nutrition, depending on the breeding area. The study of phenotypic correlations included the following milk performance traits: milk yield, milk fat content, milk fat yield, yield of 4% corrected milk; and fertility properties: age at first calving and service period. The results of the study among other things indicate that although the phenotypic correlations between the fertility and milk performance properties show different degrees of variation, they should be taken into account in the final assessment of the breeding value of the animal, so that the breeding selection programs are more comprehensively designes.

scholarly journals The influence of age at first fertilization on some reproductive and performance traits of Simmental cows in first three lactations

2002 ◽  
Vol 18 (1-2) ◽  
pp. 17-22 ◽  
Author(s):  
Predrag Perisic ◽  
Zlatko Skalicki ◽  
Milan Petrovic
Keyword(s):  
Statistical Analysis ◽  
Milk Fat ◽  
Reproductive Traits ◽  
Negative Deviation ◽  
Method Of Least Squares ◽  
Service Period ◽  
Performance Traits ◽  
General Average ◽  
And Performance ◽  
Effect Of Age

Certain reproductive and performance traits of Simmental cows, as well as the demonstration of those traits depending on the effect of age at first fertilization, were investigated. The investigation included 606 cows, divided according to age at first fertilization, in 10 groups (one month difference among groups). Statistical analysis of data was done by method of Least squares (LSMLMW, Harvey, 1989), the model with fixed influence of factors on observed traits was applied. Established results have shown that the age of head of cattle at first fertilization had highly significant effect (P<0,01) on the occurrence of deviation from the general average in the first service period and also on the weight of calves at first calving. At the second and third calving, the deviations from the general average in investigated reproductive traits were within the limits of random. In regard to the demonstration of performance traits, the effect of age at first fertilization was most expressive in first lactation. The greatest negative deviation from the general average in milk yield and yield of milk fat, were established in first calving cows which were the youngest at fertilization-calving. The increase of age at first fertilization induced the less negative deviations from the general average. In the second and third lactation, deviation from the general average depending on the age at first fertilization, expressed the same trend, but within the limits of random deviations (P>0,05).

scholarly journals Investigation of the genetic correlation between milk and fertility traits of first calving cows of Simmental breed

2008 ◽  
Vol 24 (5-6) ◽  
pp. 1-8 ◽  
Author(s):  
Vlada Pantelic ◽  
M.M. Petrovic ◽  
S. Aleksic ◽  
Ljiljana Sretenovic ◽  
D. Ostojic-Andric ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Genetic Correlation ◽  
Milk Fat ◽  
Mixed Model ◽  
Genetic Correlations ◽  
Production Capacity ◽  
Agricultural Producers ◽  
Milk Traits ◽  
Service Period ◽  
Fertility Traits

Investigation of the production capacity of cattle for the purpose of increase of milk and milk fat production, as well as number of calves, greatly depends on phenotypic and genetic variability, heritability and correlation between desired traits, and on production level in the population. This research included 3.461 first calving cows of Simmental breed under control and reared on farms of individual agricultural producers on the territory of Republic of Serbia. Genetic correlations were calculated using equation of mixed model which included the effect of bull-sire, breeding region, year and season of calving: Yijklm = ? + Bi + Rj + Gk + Sl + eijklm. Coefficients of genetic correlation between service period and milk traits were following: duration of lactation 0,239, milk yield 0,089, percentage of milk fat 0,095, quantity of milk fat 0,105 and yield of 4%FCM 0,099. Correlation between service period and age at calving was 0,535. Genetic correlation between age at calving and milk traits was following: duration of lactation 0,245, production of milk 0,003, percentage of milk fat 0,531, quantity of milk fat 0,082 and production of 4%FCM 0,050.

Genetic analysis of reproductive Traits of Tharparker cattle at organized farms in Rajasthan

2017 ◽  
Author(s):  
Geetesh Mishra ◽  
M. F. Siddiqui ◽  
V. S. Ingle ◽  
R. S. Pal
Keyword(s):  
Least Squares ◽  
Management Practices ◽  
Correlation Coefficients ◽  
Reproductive Traits ◽  
Gestation Period ◽  
Effective Management ◽  
Dry Period ◽  
Age At First Calving ◽  
Service Period ◽  
Tharparkar Cattle

The present study was carried out from the data obtained on the reproduction performance of 95 Tharparkar cattle over the period 1995-2014. The overall least squares mean and standard error for age at first calving, service period, gestation period, dry period and intercalving period were 1769.07± 29.80, 117.53± 2.39, 281.62± 0.37, 105.03 ± 2.09 and 399.97 ± 2.44 days, respectively. The Least Squares Analysis of Variance has revealed that there was a significant effect of sire ( P>0.01) and period (P>0.05) on age at first calving and the service period is significantly influenced by period and parity of the animal .Similarly the gestation period was affected by parity, dry period was affected by period of study and inter calving period was substantially influenced by period and parity of the animal. The observed correlation coefficients among different reproductive traits were significant to highly significant where as the estimates of heritability for the same traits were low to moderate. The significant effect of several non-genetic factors on most of the reproductive traits suggesting that they are low heritable and cannot be improved by conventional selection methods but can only be improved through effective management practices, nutrition, health etc..

Sign in / Sign up

Export Citation Format

Share Document