Differences in hair coat shedding, and effects on calf weaning weight and BCS among Angus dams

Gray, Kent; Smith, T.; Maltecca, Christian; Overton, P.; Parish, Jane A.; Cassady, J. P.

doi:10.1016/j.livsci.2011.02.009

Cited by 34 publications

(58 citation statements)

References 8 publications

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“…Using all available data, the estimated narrow-sense heritability ( 2 2 + 2 + 2 ) was 0.40, and the estimated repeatability ( 2 + 2 2 + 2 + 2 ) was 0.44. These estimates are similar to those previously found in Angus cattle based on pedigree relatedness (21).…”

Section: Genetic Parameters and Predictionsupporting

confidence: 90%

Development of a genetic evaluation for hair shedding in American Angus cattle to improve thermotolerance

Durbin

Lu²,

Yampara-Iquise

et al. 2020

Preprint

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Background: Heat stress and fescue toxicosis caused by ingesting tall fescue infected with the endophytic fungus Epichloë coenophiala represent two of the most prevalent stressors to beef cattle in the United States, costing the beef industry millions of dollars each year. The rate at which a beef cow sheds her winter coat early in the summer is an indicator of adaptation to heat and an economically relevant trait in many parts of the U.S. Further, research suggests that early-summer hair shedding may be reflective of tolerance to fescue toxicosis, as vasoconstriction induced by fescue toxicosis limits the ability of an animal to shed its winter coat. Here, we developed parameters for routine genetic evaluation of hair shedding score in American Angus cattle and identified genomic loci associated with variation in hair shedding score via genome-wide association analysis (GWAA). Results:Hair shedding score was found to be moderately heritable (h2 = 0.34 to 0.40), with differing repeatability estimates between cattle grazing versus not grazing endophyte-infected tall fescue. Our results suggest modestly negative genetic and phenotypic correlations between a dam's hair shedding score (lower score is earlier shedding) and the weaning weight of her calf, one metric of performance. Together, these results indicate that economic gains can be made via the use of hair shedding score breeding values to select for heat tolerant cattle. GWAA identified 176 variants significant at FDR < 0.05. Functional enrichment analyses using genes within 50 Kb of these variants identified pathways involved in keratin formation, prolactin signaling, host-virus interaction, and other biological processes. Conclusions:This work contributes to a continuing trend in the development of genetic evaluations for environmental adaptation. The results of this work will aid beef cattle producers in selecting more sustainable and climate-adapted cattle, as well as enable the development of similar routine genetic evaluations in other breeds.3

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Section: Genetic Parameters and Predictionsupporting

confidence: 90%

Development of a genetic evaluation for hair shedding in American Angus cattle to improve thermotolerance

Durbin

Lu²,

Yampara-Iquise

et al. 2020

Preprint

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show abstract

“…Cows and calves of this research herd did have, in some cases, substantial winter hair growth, with almost all shedding completed by May of each year. Shedding may be an important component of adaptation rather than quantity of hair or coat at any given point; there appears to be genetic variation for winter coat shedding in Angus cattle (Gray et al, 2011). This has not been experimentally confirmed in this herd.…”

Section: Coat Scorementioning

confidence: 72%

Genetic assessment of rectal temperature and coat score in Brahman, Angus, and Romosinuano crossbred and straightbred cows and calves under subtropical summer conditions

et al. 2012

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“…Cattle with dark, thick wooly coats are at a disadvantage in hot, humid climates and are at increased risk of heat stress, dehydration and loss of performance (Gray et al, 2011). On the other hand, cattle that have shed their hair coat have lower body temperatures and an increase in gain (Williams et al, 2006).…”

Section: Effects Of Hair Shedding On Gain and Healthmentioning

confidence: 99%

“…On the other hand, cattle that have shed their hair coat have lower body temperatures and an increase in gain (Williams et al, 2006). Gray et al, (2011) …”

Section: Effects Of Hair Shedding On Gain and Healthmentioning

confidence: 99%

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088 Evaluation of initial body weight and supplementation levels on health and performance of newly received stocker calves

Wilkins

Karisch

Smith

et al. 2016

Journal of Animal Science

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Differences in hair coat shedding, and effects on calf weaning weight and BCS among Angus dams

Cited by 34 publications

References 8 publications

Development of a genetic evaluation for hair shedding in American Angus cattle to improve thermotolerance

Development of a genetic evaluation for hair shedding in American Angus cattle to improve thermotolerance

Genetic assessment of rectal temperature and coat score in Brahman, Angus, and Romosinuano crossbred and straightbred cows and calves under subtropical summer conditions

088 Evaluation of initial body weight and supplementation levels on health and performance of newly received stocker calves

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