Relationships among Richards Growth Curve Parameters, Reproductive and Milk Production Traits in Brown Swiss Cattle

Bayram, Bahri; Yanar, Mete; Akbulut, Ömer

doi:10.1080/09712119.2004.9706500

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…These animals will continue to grow after the first service and will end up with a considerable adult weight. These results differ from those found by Bayram et al (2004), in Brown Swiss cattle using the Richards model, who reported a positive correlation between age at first calving and estimated adult weight (β 0 ). For these authors, an increase in weight at the age at first calving meant an increase in adult weight.…”

Section: Association Of the Snps With The Variation Of The Growth Cur...contrasting

confidence: 99%

Effect of IGF-1 and LEP/ob SNPs on growth parameters of Blanco Orejinegro cattle

Londoño-Gil

Herrera

et al. 2022

RevFacAgron(LUZ)

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The aim of this work was to identify the effect of some SNPs of the IGF-1 and LEP/ob genes, on the growth in animals of the Blanco Orejinegro creole breed (BON) and to evaluate the relationship of age at first calving (AFC) with the curve trajectory. For this, 1217 phenotypic and 439 genomic records of pure BON bovines were used. The Gompertz, Logistic, Von Bertalanffy and Brody models were evaluated. The individual growth curve parameters were estimated and the effect of SNPs of the IGF-1 and LEP/ob genes on the curve parameters was estimated through a linear model. Finally, the association of the curve parameters and the AFC was analyzed trough a linear model. The model that represented the best fit to the growth trajectory was Brody's. On average, the BON animals presented an adult weight (β0) of 479.9±7.4 kg and a growth rate expressing the daily weight gain as a proportion of the total weight (β2) of 0.002±0.00004. The SNPs rs110654613 (nucleotide change A/G) and rs110959643 (A/G), within the IGF-1 gene, showed a significant effect (p<0.05) on the parameters of the BON cattle growth curve. There were no associations of LEP/ob gene SNPs on the parameters of the BON cattle growth curve. AFC was significantly associated (p<0.05) with the parameters β0 and β2. It is concluded that the use of genomic information for the IGF-1 gene can lead to higher growth rates and earlier.

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Section: Association Of the Snps With The Variation Of The Growth Cur...contrasting

confidence: 99%

Effect of IGF-1 and LEP/ob SNPs on growth parameters of Blanco Orejinegro cattle

Londoño-Gil

Herrera

et al. 2022

RevFacAgron(LUZ)

View full text Add to dashboard Cite

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“…Several studies have reported significant correlations between estimates of growth curve parameters and reproductive traits in cattle (Beltrán et al, 1992;Menchaca et al, 1996;Bayram et al, 2004;Nesetrilova, 2005). Results indicated a negative association between the maturing rate index and the young cow reproductive traits age at first calving and calving interval, suggesting that early-maturing cows were younger at first calving and had shorter calving intervals, both indicators of improved fertility.…”

Section: Discussionmentioning

confidence: 98%

Growth characteristics, reproductive performance, and evaluation of their associative relationships in Brangus cattle managed in a Chihuahuan Desert production system1

Luna‐Nevárez

Bailey

et al. 2010

Journal of Animal Science

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Balancing growth and reproductive performance in beef cattle managed in desert environments is challenging. Our objectives were to 1) evaluate trends in growth and reproductive traits, and 2) assess associative relationships between growth characteristics and reproductive performance in a Brangus herd managed in a Chihuahuan Desert production system from 1972 to 2006. Data were from bull (n = 597) and heifer calves (n = 585; 1988 to 2006) and cows (n = 525; repeated records of cows, n = 2,611; 1972 to 2006). Variables describing the growth curve of each cow were estimated using a nonlinear logistic function (each cow needed 6 yr of data). Mixed-effect models and logistic regression were used to analyze trends across years in growth and reproductive traits (both continuous and categorical). For continuous traits of calves, a slight cubic response (P < 0.01) described the dynamics of birth weight, 205-d BW, and 365-d BW across years. For categorical traits of females, positive linear trends (P < 0.05) across years were observed in percent pregnant as yearlings, calved at 2 yr of age, and first-calf heifer rebreeding (slopes ranged from 0.007 to 0.014%/yr). Autumn cow BW increased gradually until 1997 (509 kg +/- 8.8) and then decreased gradually by 0.6 kg/yr, whereas pregnancy percentage decreased gradually until 1995 (78.4% +/- 1.0) and then increased slightly by 0.2%/yr. A quadratic effect best described the dynamics of these 2 variables across years (P < 0.01) as well as estimates describing the growth curve of each cow. Specifically, asymptotic BW and age increased (P < 0.05) from 1972 to 1983 and 1990, respectively. Asymptotic age then decreased by 27% from 1983 to 1996 (P < 0.05). The maturing rate index was negatively correlated with age at first calving and calving interval (r = -0.42 and -0.18, P < 0.01), which suggested that early-maturing cows had enhanced fertility in this environment and production system. In summary, minimal changes were observed in measures of growth in bulls and heifers in a Brangus herd managed in the Chihuahuan Desert. Opposing relationships were observed among measures of cow size and fertility; as growth curves shifted toward earlier maturity, measures of reproductive performance suggested that fertility improved.

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Sinusoidal function to describe the growth curve of dairy heifers

et al. 2019

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The objective of the present study is to introduce a sinusoidal function into dairy research and production by applying it to bodyweight records (from 1 to 24 months) from six dairy cow breeds reported by the Dairy Heifer Evaluation Project of Penn State Extension (USA) from 1991 to 1992. The function was evaluated with regard to its ability to describe the relationship between bodyweight and age in dairy heifers, and then compared with seven standard growth functions, namely monomolecular, logistic, Gompertz, von Bertalanffy, Richards, Schumacher and Morgan. The models were fitted to monthly bodyweight records of dairy heifers using non-linear regression to derive estimates of the parameters of each function. The models were tested for goodness of fit by using adjusted coefficient of determination, root mean square error, Akaike’s information criterion and Bayesian information criterion. Values of adjusted coefficient of determination were generally high for all models, suggesting the generally appropriate fit of the models to the data. The sinusoidal function provided the best fit of the growth curves for Brown Swiss, Guernsey and Milking Shorthorn breeds due to the lowest values of root mean square error, Akaike’s information criterion and Bayesian information criterion. According to the chosen statistical criteria, the Richards function provided the best fit for Ayrshire heifers, and the monomolecular the best for Holstein and Jersey. The least accurate estimates were obtained with the logistic. In conclusion, the sinusoidal function introduced here can be considered as an appropriate alternative to standard growth functions when modelling growth patterns in dairy heifers.

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Relationships among Richards Growth Curve Parameters, Reproductive and Milk Production Traits in Brown Swiss Cattle

Cited by 6 publications

References 7 publications

Effect of IGF-1 and LEP/ob SNPs on growth parameters of Blanco Orejinegro cattle

Effect of IGF-1 and LEP/ob SNPs on growth parameters of Blanco Orejinegro cattle

Growth characteristics, reproductive performance, and evaluation of their associative relationships in Brangus cattle managed in a Chihuahuan Desert production system1

Sinusoidal function to describe the growth curve of dairy heifers

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