The evaluation of gestation length range for different breeds of Polish dairy cattle

Sobek, Z.; Nienartowicz–Zdrojewska, A.; Różańska-Zawieja, Jolanta; Siatkowski, Idzi

doi:10.1515/bile-2015-0004

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…Since animals with different levels of Jersey inheritance exist; the present study was also carried out to analyze the variation in GL with genetic grades. Establishing the range of these variations is economically important, as it may reduce the costs of parentage control of individuals born out of particularly long pregnancies [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Genetic and environmental causes of variation in gestation length of Jersey crossbred cattle

et al. 2016

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Aim:The objective of this study was to investigate the effect of genetic and non-genetic factors and estimate the genetic parameter for gestation length (GL) of Jersey crossbred cattle.Materials and Methods:The data included the 986 parturition records on Jersey crossbred cattle maintained at the Eastern Regional Station of ICAR-National Dairy Research Institute, Kalyani, West Bengal, India during 36 years (1978-2013). The data were analyzed applying mixed model least square technique considering the fixed effects of genetic group, season of calving, period of calving, parity of animal, birth weight, and sex of calf born from animal. The effect of sire was included as a random effect in the model.Results:The genetic group of animal, season of calving, parity of animal, and birth weight of calf born were found to be a significant source of variation in the GL, whereas the period of calving and sex of calf did not affect this trait. Cows with <50% and >62.5% Jersey inheritance had the shortest and longest GLs, respectively. Cows calved in summer and rainy season had shorter GL than those calved in the winter season. Older cows in 4th parity carried calves for longer days than the cows in 1st parity. The increase in calf birth weight significantly (p<0.01) contributed to a linear increase in GL value in this study. The heritability estimate of GL was 0.24±0.08.Conclusion:It can be concluded that selection for lower GL without distressing future growth of calf can be used to reduce calving difficulty, but a very small standard deviation of GL limits the benefit. Moreover, more accurate prediction of calving date will help in better management and health care of pregnant animals.

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Section: Introductionmentioning

confidence: 99%

Genetic and environmental causes of variation in gestation length of Jersey crossbred cattle

et al. 2016

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“…A pregnancy code took a value of 1 when the record was in the range of 300 days before calving (pregnant) and 0 for the other records (empty). This range was taken as a reference since it was reported for Continental breeds (Sobek et al, 2015) and Bos indicus breeds (Chenoweth, 1994). The lactation status was assigned with another code that took a value of 1 when the record was between the calving date and one day after weaning (cows suckled), the records outside it took a value of 0 (dry).…”

Section: Datamentioning

confidence: 99%

Additive and non-additive effects for mature weight in beef cattle

Guillenea

Lema²,

Gimeno³

et al. 2020

ALPA

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Selection has emphasized animal growth, leading to an increase in their mature size affecting in some cases the pregnancy of the cows and the efficiency of the systems. Usually, crossbreeding improve productivity because of the genetic effects that the cows exploit, but the impact on mature weight (MW) has not been studied. The present study aimed at estimating MW and genetic parameters associated with the MW in crosses between two British breeds: Hereford (H/H) and Angus (A/A), a Continental: Salers (S/S), and a Zebu: Nelore (N/N). MW was analyzed at 4; 4.5; 5; 5.5 and 6 years of age using a repeated-measure sire model. For parameters estimation, an additive – dominant model was used including the fixed effects of breed group, contemporary group, and age as covariate linear and quadratic, with the linear regression fitted by breed group. Permanent environmental and sire were included as random effects. According to the results, it is expected to observe heterosis between H/H and N/N, however, the structure of the data may not be enough for estimate accurately the genetic parameters in this trait. The A/H, N/H, S/H, S/SH and H/NH cows were heavier than the H/H cows. All the breed groups continue gaining weight until six years of age. The results revealed that British crossbred animals are heavier than H/H at the first crossing but not in the following. Crossbred cows with proportions of 0.5 and greater for the Continental breed are heavier than H/H cows. Crosses between British and Zebu cows have higher mature weight than H/H at the first crossing and in backcrosses toward the British in all ages.

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Advances in biosensor development for the determination of antibiotics in cow's milk - A review

2022

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The evaluation of gestation length range for different breeds of Polish dairy cattle

Cited by 4 publications

References 7 publications

Genetic and environmental causes of variation in gestation length of Jersey crossbred cattle

Genetic and environmental causes of variation in gestation length of Jersey crossbred cattle

Additive and non-additive effects for mature weight in beef cattle

Advances in biosensor development for the determination of antibiotics in cow's milk - A review

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