John S Clay

Works (12)

Updated: April 4th, 2024 02:26

2023 journal article

Characterization of semen type prevalence and allocation in Holstein and Jersey females in the United States

Journal of Dairy Science.

By: M. Lauber *, F. Peñagaricano *, R. Fourdraine *, J. Clay*  & P. Fricke *

MeSH headings : Pregnancy; Cattle; Animals; Female; United States; Semen; Prevalence; Dairying; Insemination, Artificial / veterinary; Sex Preselection / veterinary
Source: ORCID
Added: March 18, 2023

2021 journal article

Associations between dry period length and time to culling and pregnancy in the subsequent lactation

JOURNAL OF DAIRY SCIENCE, 104(8), 8885–8900.

By: P. Pattamanont *, K. Galvao *, M. Marcondes *, J. Clay n  & A. De Vries *

author keywords: dry period; survival analysis; reproduction; replacement
MeSH headings : Animals; Cattle; Dairying; Female; Lactation; Milk; Pregnancy; Proportional Hazards Models; Time
TL;DR: In conclusion, variations in DPL were associated with meaningful differences in the hazard ratios for culling and pregnancy and minor Differences in the relative frequency of disposal codes. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: July 26, 2021

2021 journal article

Intergenerational cycle of disease: Maternal mastitis is associated with poorer daughter performance in dairy cattle

Journal of Dairy Science.

By: T. Swartz *, B. Bradford * & J. Clay* 

author keywords: mastitis; developmental programming; epigenetics; dairy cattle
MeSH headings : Animals; Cattle; Cattle Diseases; Female; Humans; Lactation; Mastitis / veterinary; Milk; Milk Proteins; Nuclear Family
TL;DR: A phenomenon similar to those found in human and mouse models examining prenatal inflammation effects, whereby daughters born from dams with elevated SCS had poorer performance was uncovered, likely due to a predisposition for mastitis and alterations in the epigenome controlling milk fat synthesis. (via Semantic Scholar)
UN Sustainable Development Goal Categories
1. No Poverty (OpenAlex)
Source: ORCID
Added: February 7, 2022

2020 journal article

Distribution of seasonality of calving patterns and milk production in dairy herds across the United States

Journal of Dairy Science, 103(9), 8161–8173.

By: F. Ferreira *, J. Clay*  & A. Vries *

author keywords: seasonality; calving; milk; sinusoidal
MeSH headings : Animals; Cattle / physiology; Female; Milk / metabolism; Parturition; Seasons; United States
TL;DR: Seasonality in calving patterns and milk production among herds in the US varied greatly across the US, and states in the south of the US were the most seasonal for calving pattern and milkProduction. (via Semantic Scholar)
Source: ORCID
Added: February 7, 2022

2020 journal article

Piecewise modeling of the associations between dry period length and milk, fat, and protein yield changes in the subsequent lactation

JOURNAL OF DAIRY SCIENCE, 104(1), 486–500.

By: P. Pattamanont *, M. Marcondes *, J. Clay n , A. Bach * & A. De Vries *

author keywords: dry period; segmented; model; prediction
MeSH headings : Animals; Cattle / physiology; Cohort Studies; Dairying; Female; Glycolipids / metabolism; Glycoproteins / metabolism; Lactation; Lipid Droplets / metabolism; Milk / chemistry; Milk / metabolism; Milk Proteins / metabolism; Models, Biological; Parity; Pregnancy; Retrospective Studies; Time Factors
TL;DR: P predictive models of 305-d mature-equivalent milk, fat, and protein yields in the subsequent lactation as continuous functions of the number of days dry (DD) in the current lactation fit the observed data well and may be useful for decision support on the optimal dry period length for individual cows. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: January 19, 2021

2016 journal article

Periconceptional Heat Stress of Holstein Dams Is Associated with Differences in Daughter Milk Production during Their First Lactation

PLOS ONE, 11(2).

By: B. Brown*, J. Stallings n, J. Clay n  & M. Rhoads *

MeSH headings : Animals; Cattle; Female; Fertilization / physiology; Hot Temperature / adverse effects; Lactation / physiology; Milk / metabolism; Pregnancy; Seasons; Stress, Physiological / physiology
TL;DR: Overall however, heat stress at the time of conception is associated with lower milk production during the first lactation, and this association does not prove cause and effect, but does provide justification for additional investigation into whether heat stress around thetime of conception results in long-term, detrimental consequences for the conceptus. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2015 journal article

A Genome-Wide Association Study for Clinical Mastitis in First Parity US Holstein Cows Using Single-Step Approach and Genomic Matrix Re-Weighting Procedure

PLOS ONE, 10(2).

By: F. Tiezzi  n, K. Parker-Gaddis n, J. Cole *, J. Clay*  & C. Maltecca n 

Contributors: F. Tiezzil, K. Parker-Gaddis n, J. Cole *, J. Clay*  & C. Maltecca n 

MeSH headings : Animals; Cattle; Chromosomes, Mammalian / genetics; Female; Genome-Wide Association Study; Mastitis, Bovine / genetics; Polymorphism, Single Nucleotide; Quantitative Trait Loci; United States
TL;DR: A genome-wide association study for CM in first-lactation Holstein confirmed that CM follows a highly polygenic mode of inheritance, and candidate QTL for CM were identified in the US Holstein population. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2015 journal article

Periconceptional Heat Stress of Holstein Dams Is Associated with Differences in Daughter Milk Production and Composition during Multiple Lactations

PLOS ONE, 10(10).

By: B. Brown*, J. Stallings n, J. Clay n  & M. Rhoads *

MeSH headings : Animals; Cattle; Female; Fertilization; Heat-Shock Response; Humidity; Lactation; Milk / metabolism; Milk Proteins / analysis; Seasons; Temperature; United States
TL;DR: Overall, the most striking result of this study is the consistency of the relationship between HSC and milk production, which suggests that heat stress at or around the time of conception impairs cow milk yield throughout her lifetime. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2015 journal article

Short communication: Genomic selection for hoof lesions in first-parity US Holsteins

JOURNAL OF DAIRY SCIENCE, 98(5), 3502–3507.

By: K. Dhakal n, F. Tiezzi  n, J. Clay*  & C. Maltecca n 

Contributors: K. Dhakal n, F. Tiezzi  n, J. Clay*  & C. Maltecca n 

author keywords: genomic selection; hoof lesions; reliability
MeSH headings : Animals; Cattle; Cattle Diseases / genetics; Female; Foot Diseases / genetics; Foot Diseases / veterinary; Genomics; Hoof and Claw / metabolism; Parity; Pedigree; Phenotype; Pregnancy; Selection, Genetic; United States
TL;DR: Pedigree- and genomic-based univariate analyses were conducted to estimate the variance components and heritability of infectious and noninfectious hoof lesions of US Holsteins and confirmed low genetic correlations between hoof lesion traits and hoof type traits along with productive life and net merit. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2014 journal article

Genomic selection for producer-recorded health event data in US dairy cattle

JOURNAL OF DAIRY SCIENCE, 97(5), 3190–3199.

By: K. Gaddis  n, J. Cole *, J. Clay*  & C. Maltecca n 

Contributors: K. Parker Gaddis  n, J. Cole *, J. Clay*  & C. Maltecca n 

author keywords: dairy cattle; health; genomic selection
MeSH headings : Animals; Breeding; Cattle / genetics; Cattle Diseases / genetics; Dairying / economics; Endometritis / veterinary; Female; Genomics; Ketosis / veterinary; Lameness, Animal / genetics; Mastitis, Bovine / genetics; Milk; Parity; Pedigree; Phenotype; Placenta, Retained / veterinary; Pregnancy; Quantitative Trait, Heritable; Reproducibility of Results; Selection, Genetic / genetics; United States
TL;DR: It was concluded that genetic selection for health traits using producer-recorded data are feasible in the United States, and that the inclusion of genomic data substantially improves reliabilities for these traits. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2004 journal article

Variances of and correlations among progeny tests for reproductive traits of cows sired by AI bulls

JOURNAL OF DAIRY SCIENCE, 87(7), 2307–2313.

By: J. Clay n , B. McDaniel n & C. Brown n

author keywords: daughter; reproduction; fertility; non-return
MeSH headings : Animals; Breeding; Cattle / genetics; Dairying; Female; Fertility / genetics; Genetic Variation; Insemination, Artificial / veterinary; Lactation / genetics; Male; Quantitative Trait, Heritable; Reproduction / genetics
TL;DR: Very low correlations of EBV for daughter reproductive traits with PTA for yield indicate that, in order to improve daughter fertility, fertility must be incorporated in sire selection decisions. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2001 journal article

Computing mating bull fertility from DHI nonreturn data

JOURNAL OF DAIRY SCIENCE, 84(5), 1238–1245.

By: J. Clay n  & B. McDaniel*

author keywords: nonreturn; fertility; mating bull; animal model
MeSH headings : Age Factors; Animals; Cattle / genetics; Cattle / physiology; Computers; Environment; Female; Fertility / genetics; Fertility / physiology; Insemination, Artificial / veterinary; Lactation / genetics; Lactation / physiology; Male; Models, Biological; Pedigree; Pregnancy; Pregnancy Rate; Time Factors
TL;DR: Estimates of fertility of Holstein AI mating bulls based upon 70-d nonreturn of first breedings as reported to U.S. DHIA from 1988 through 1997 were greater for breedings to cows that were young, had low early lactation production, and were in late stages of lactation. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

Employment

Updated: April 20th, 2020 12:52

1984 - present

North Carolina State University Raleigh, NC, US
Director Dairy Records Management Systems

Education

Updated: April 20th, 2020 12:53

North Carolina State University Raleigh, NC, US
PhD Animal Science

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