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 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 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 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.

COMPARATIVE ANALYSIS OF THE EVALUATION RESULTS OF HOLSTEIN BLACK-MOTLEY BREEDING BULLS BY THEIR DAUGHTERS’ PRODUCTIVITY BASED ON OFFICIAL INSTRUCTIONS AND BLUP MODEL

2020 ◽  
pp. 155-163
Author(s):  
K.ZH. ZHUMANOV ◽  
◽  
T.N. KARYMSAKOV ◽  
M.A. KINEEV ◽  
M.V. TAMAROVSKIY ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Milk Fat ◽  
Cattle Breed ◽  
Breeding Value ◽  
Cattle Breeding ◽  
Lower Efficiency ◽  
Dairy Cattle Breeding ◽  
The Usa ◽  
Current Instruction ◽  
The Republic

According to the current “Instruction” used in dairy cattle selection and breeding in the Republic of Kazakhstan, bulls-producers of dairy breeds are assessed according to the their offspring quality based on the principle of “peer daughter”. This means that the phenotypic indicators of the daughters of the tested bulls are compared with the corresponding indicators of their peers. In European countries with developed dairy cattle breeding, as well as in Canada, the USA, etc., to ensure a reliable forecast of the genetic value of individuals (primarily, bulls-producers), use is made of the best linear unbiased forecast method (BLUP method). This method implies that the breeding value of producers is determined by the deviation values of the development of traits of the examined animal from its average values in the population. Especially urgent area is the research aimed at improving breeding programs, including assessing the breeding value of bulls-producers of dairy breeds using BLUP methods based on the productive qualities of the mass of dairy cattle in the Republic of Kazakhstan. The research material included the data on the phenotypic indicators of the milk productivity of first-calf cows (the amount of milk yield, the content of fat and protein in milk, the yield of milk fat and protein) of the Holstein black-motley dairy cattle breed, obtained from the information and analytical database of the Republic of Kazakhstan for 2016–2017. It was found that when evaluating according to the official “Instruction”, 16 sires out of 256 bulls (6.2%) got the stud category in 2016, 14 sires (9.2%) out of 152 bulls in 2017, and – 30 sires of 249 bulls (12.0%) over the cumulative period. The results of the conducted research prove that the use of the classic “Instructions” in dairy cattle breeding has lower efficiency (by 42.8–90.0%) as compared with the assessment of the breeding value of bulls based on the BLUP method.The selection of sire bulls into breeding groups based on the “peer daughter” methodology is not reliable enough and rather ineffective. Comparing the results of assessing the breeding qualities of sire bulls, obtianed using two methods in all compared periods (2016, 2017, 2016–2017), the authors established a clear superiority of the BLUP method over the current Instruction used in the Republic of Kazakhstan.

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

Genetic and non-genetic factors affecting productive and reproductive traits in Deoni cattle

2018 ◽  
Author(s):  
Sukanta Basak ◽  
D. N. Das ◽  
U. T. Mundhe
Keyword(s):  
Milk Yield ◽  
Genetic Factors ◽  
Cattle Breed ◽  
Reproductive Traits ◽  
Phenotypic Correlation ◽  
Dual Purpose ◽  
Factors Affecting ◽  
Lactation Length ◽  
Service Period ◽  
Dual Purpose Cattle

The present study was carried out in Deoni, the dual purpose cattle breed of Southern India, maintained at NDRI herd, SRS, Bengaluru. Mean phenotypic performances for the traits of age at first calving (AFC), first service period (FSP), first lactation milk yield (FLMY) and first lactation length (FLL) were estimated as 42.90 ± 0.49 months, 179.00 ± 6.3 days, 643.08 ± 25.16 kg and 178.24 ± 4.41 days respectively. Significant effect of parity was found on AFC and FSP. Effect of period of birth, period of calving and season of calving was found to be significant on FSP. Significant effect of period of birth, period of calving, classes of AFC and FLL were found on FLMY. The heritability of first lactation milk yield was estimated as 0.38 ± 0.29. Phenotypic correlation of FLMY with FLL (0.88 ± 0.02) was found to be highly significant (p Lass Than 0.01).

Genetic and phenotypic relationships between fertility and wool production in 2-year-old Merino sheep

1967 ◽  
Vol 18 (3) ◽  
pp. 515 ◽  
Author(s):  
JP Kennedy
Keyword(s):  
Body Weight ◽  
Genetic Correlations ◽  
Standard Errors ◽  
Phenotypic Correlation ◽  
Correlated Responses ◽  
Merino Sheep ◽  
Wool Production ◽  
Phenotypic Correlations ◽  
Selection For ◽  
Fertility Traits

Records of the lambing and weaning performance (fertility) of 2-year-old Peppin Merino ewes were analysed. Repeatability and heritability of number of lambs born and weaned were low. Heritability of number of lambs born was significantly different from zero (0.20 ± 0.10). Phenotypic and genetic correlations between the fertility traits and greasy wool weight, all measured at approximately 15 months of age, were calculated. Phenotypic correlations between number of lambs born or weaned and greasy wool weight were negative and significant. The phenotypic correlation between number of lambs weaned and clean wool weight was negative and significant. Significant negative genetic correlations were found between number of lambs born and both greasy wool weight and clean wool weight. Genetic correlations between number of lambs weaned and the fleece and body traits had very large standard errors. The results were used to estimate correlated responses in fertility resulting from selection for greasy wool weight, clean wool weight, and body weight of –0.08i, –0.13i, and 0.03i respectively.

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 POLYMORPHISM OF PARAOXONASE-1 GENE (PON1) AND ITS ASSOCIATION WITH ECONOMIC TRAITS OF HOLSTEIN CATTLE

2020 ◽  
Vol 15 (3) ◽  
pp. 43-48
Author(s):  
Natal'ya Safina ◽  
Shamil' Shakirov ◽  
El'za Gaynutdinova ◽  
Ziliya Fattahova
Keyword(s):  
Milk Fat ◽  
Growth Dynamics ◽  
Paraoxonase 1 ◽  
Holstein Cattle ◽  
Economic Traits ◽  
Reproductive Ability ◽  
Pon1 Gene ◽  
Service Period ◽  
Pcr Rflp ◽  
The Republic

The purpose of the research was to study the polymorphism of the paraoxonase-1 gene with the replacement of A with G in the promoter region, as well as to evaluate the growth, milk productivity and reproductive ability of Holstein heifers with different genotypes on this gene. The work was performed in 2018–2019 in the Republic of Tatarstan on 148 first-calf cows. Genotyping was conducted by PCR-RFLP in Bsc4I locus of PON1 gene. The studied population was polymorphic, the genetic balance was not disturbed. The distribution of alleles and genotypes was as follows: A – 0.564 and G – 0.436; AA – 31.8 % (48 animals), GA – 49.3 % (75 animals), GG – 18.9 % (28 animals). Animals with GA genotype of PON1 gene were not significantly better in terms of growth dynamics (kg) in control weighing from 6 to 18 months and of daily gain (g) in 6-18 months period. The cows from the same group were statistically significantly superior to heifers with AA and GG in terms of reproductive ability: fertility index of Dohi (56.2), calving interval (395.7 days), service period (122 days), and were distinguished by the early age of the first successful insemination (17.1 months). It was found that first-calf heifers with the GG genotype were better in milk yield per 305 days of lactation (7339.6 kg), milk fat yield (291.1 kg) and milk protein yield (254.6 kg). The identified associations of PON1 gene polymorphism can be used for the selection of parental pairs for targeted breeding to improve economically useful signs of Holstein cattle

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).

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