Article
Genetics & Heredity
Daniela Elena Ilie, Alexandru Eugeniu Mizeranschi, Ciprian Valentin Mihali, Radu Ionel Neam, George Vlad Goilean, Ovidiu Ionut Georgescu, Daniela Zaharie, Mihai Carabas, Ioan Hutu
Summary: This study conducted the first GWAS for somatic cell score (SCS) in Romanian dairy cattle breeds, identifying one significant SNP associated with SCS and 40 suggestive SNPs. The results contribute to expanding the knowledge on genetic variability explained by SNPs for SCS in dairy cattle.
Article
Microbiology
Jenna R. Williamson, Todd R. Callaway, Jeferson M. Lourenco, Valerie E. Ryman
Summary: This study aimed to characterize similarities between rumen, fecal, and milk microbiota simultaneously and investigate their associations with milk somatic cell count (SCC) and milk yield. The results demonstrated that rumen, fecal, and milk microbiota populations were distinct, with milk microbiota being the least diverse. Milk microbial populations from cows with low SCC showed a more evenly distributed microbiome compared to cows with high SCC values.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Veterinary Sciences
Piriyaporn Sungkhapreecha, Vibuntita Chankitisakul, Monchai Duangjinda, Sayan Buaban, Wuttigrai Boonkum
Summary: Heat stress has a negative impact on dairy farming, making accurate genetic selection for heat tolerance crucial. This study used ssGBLUP and BLUP methods to investigate the genetic effects of heat stress on milk yield, milk quality, and dairy health traits, and found that the genomic predictions in the ssGBLUP method were more accurate than the BLUP method.
VETERINARY SCIENCES
(2022)
Article
Veterinary Sciences
Tosapol Dejyong, Karoon Chanachai, Nathawit Immak, Tippawon Prarakamawongsa, Theera Rukkwamsuk, Damian Tago Pacheco, Waraphon Phimpraphai
Summary: Mastitis in dairy cattle can result in significant financial losses, including reduced milk yield, the inability to sell milk during the withdrawal period after treatment, and reduced commercial value due to increased somatic cell count. This study conducted a cross-sectional survey on 208 dairy cattle farms in Chiang Mai, Thailand, aiming to identify risk factors associated with high somatic cell count (SCC) and assess the economic impact of high SCC. The findings revealed that inappropriate vacuum pressure and pulsation rate of milking machines were significant risk factors for high SCC, and treating affected cows was found to be more cost-effective than culling. The average economic loss in affected farms was estimated to be 557 USD for three months.
FRONTIERS IN VETERINARY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Tiantian Luo, Wilma Steeneveld, Mirjam Nielen, Lucio Zanini, Alfonso Zecconi
Summary: This study used milk test records of over 800,000 cows in Lombardy, Italy to investigate the association between somatic cell count (SCC) and milk production. The results confirmed a negative association between SCC and milk production, but the changes in milk production were different from previous studies, indicating the influence of local factors. These findings are important for estimating the economic impacts of mastitis and can guide interventions and inform similar regions.
Article
Agriculture, Dairy & Animal Science
Mandefrot M. Zeleke, Paul R. Kenyon, Kate J. Flay, Danielle Aberdein, Sarah J. Pain, Sam W. Peterson, Anne L. Ridler
Summary: Udder defects in non-dairy ewes can significantly impact milk production and composition, potentially affecting the production and growth of their lambs. Compensatory increases in milk production were observed in normal udder halves when one half was defective, except in cases where defects were retained for several weeks. The study highlights the importance of udder health in non-dairy ewes and the potential effects of udder defects on their offspring.
Review
Agronomy
Yulin Ma, Muhammad Zahoor Khan, Jianxin Xiao, Gibson Maswayi Alugongo, Xu Chen, Tianyu Chen, Shuai Liu, Zhiyuan He, Jingjun Wang, Muhammad Kamal Shah, Zhijun Cao
Summary: Increasing milk production is a key concern in animal production, but traditional breeding has limited achievements in this area. Identifying candidate genes associated with milk production traits can improve the accuracy of animal selection.
Article
Microbiology
Yi Yang, Zaicheng Gong, Yi Lu, Xubin Lu, Jilei Zhang, Ye Meng, Yalan Peng, Shuangfeng Chu, Wenqiang Cao, Xiaoli Hao, Jie Sun, Heng Wang, Aijian Qin, Chengming Wang, Shaobin Shang, Zhangping Yang
Summary: In this study, artificially infecting cows with BLV was found to significantly increase milk yield, especially in the second to fourth lactation, while reducing milk somatic cell count and lactose content.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Agriculture, Dairy & Animal Science
Stephanie Kamalanathan, Kerry Houlahan, Filippo Miglior, Tatiane C. S. Chud, Dave J. Seymour, Dagnachew Hailemariam, Graham Plastow, Hinayah R. de Oliveira, Christine F. Baes, Flavio S. Schenkel
Summary: Dairy cows contribute to greenhouse gas emissions from livestock, and strategies involving genetics and breeding can be used to reduce methane emissions. This study assessed three definitions for methane emission traits and their genetic parameters in Holstein cattle. The heritability of daily methane production, methane yield, and methane intensity was estimated, and a high genetic correlation was found between daily methane production and methane intensity. This study suggests that genetic selection can potentially mitigate methane emissions in Holstein cattle.
Article
Agriculture, Dairy & Animal Science
Winfried Otten, Susen Heimbuerge, Armin Tuchscherer, Ellen Kanitz
Summary: Hair cortisol concentration (HCC) was investigated in 41 multiparous Holstein Friesian cows at different stages of lactation. The study found that cortisol concentration in natural hair was highest 200 days postpartum and showed moderate positive correlation with cumulative milk yield at 300 days postpartum. There was also a positive correlation between urea concentration in milk and cortisol levels in regrown hair at 200 days, and between somatic cell count in milk and HCC in natural and regrown hairs 200 days postpartum. These findings suggest that physiological loads during lactation may be associated with increased HCC levels.
DOMESTIC ANIMAL ENDOCRINOLOGY
(2023)
Article
Agriculture, Dairy & Animal Science
R. M. Zaalberg, N. A. Poulsen, H. Bovenhuis, J. Sehested, L. B. Larsen, A. J. Buitenhuis
Summary: The study investigated the potential of predicting milk minerals with infrared milk spectra, and conducted genetic analysis and validation to determine the accuracy of the prediction models. The results showed good prediction accuracy for certain minerals, and moderate heritability estimates for others.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Victoria S. Moncur, Lydia C. Hardie, Chad D. Dechow
Summary: The study found that daily milk yield variability is heritable, with cows exhibiting less variability having better fitness; residual absolute change showed higher independence from daily milk yield compared to absolute change and standard deviation.
Article
Agriculture, Dairy & Animal Science
Beniamino Tuliozi, Roberto Mantovani, Ivana Schoepf, Shogo Tsuruta, Enrico Mancin, Cristina Sartori
Summary: Social dominance within the same species shows heritable genetic variation, with positive genetic correlations found with more developed muscle mass, lower fertility, and poorer udder health. The study provides evidence of possible evolutionary trade-offs between social dominance and fitness traits, showing that it is feasible to estimate genetic correlations involving dyadic social traits.
GENETICS SELECTION EVOLUTION
(2023)
Article
Agriculture, Dairy & Animal Science
Vittoria Bisutti, Nuria Mach, Diana Giannuzzi, Alice Vanzin, Emanuele Capra, Riccardo Negrini, Maria Elena Gelain, Alessio Cecchinato, Paolo Ajmone-Marsan, Sara Pegolo
Summary: RNA-Seq was used to investigate the transcriptome of milk somatic cells in healthy cows and cows infected with Prototheca spp. and Streptococcus agalactiae. The integration of transcriptomic data and host phenotypic traits identified hub variables for subclinical intramammary infection detection. These hub variables have potential application in screening and diagnosing subclinical intramammary infection.
JOURNAL OF ANIMAL SCIENCE AND BIOTECHNOLOGY
(2023)
Article
Agriculture, Dairy & Animal Science
Kathryn M. Tiplady, Thomas J. Lopdell, Edwardo Reynolds, Richard G. Sherlock, Michael Keehan, Thomas JJ. Johnson, Jennie E. Pryce, Stephen R. Davis, Richard J. Spelman, Bevin L. Harris, Dorian J. Garrick, Mathew D. Littlejohn
Summary: This study demonstrates the utility of FT-MIR wavenumber phenotypes in improving understanding of milk composition, presenting a larger number of QTL and putative causative genes and variants compared to predicted composition traits. Examining significance patterns across the mid-infrared spectrum further highlighted commonalities of association, likely reflecting the physico-chemical properties of milk constituents.
GENETICS SELECTION EVOLUTION
(2021)
Article
Agriculture, Dairy & Animal Science
M. Sallam, H. Benhajali, S. Savoia, D. J. de Koning, E. Strandberg
Summary: The study investigates the level of bias and reliability of cross-country genomic predictions using national EBV or MACE EBV as dependent variables. The results show that, in most cases, using MACE EBV via single-trait approach can lead to less biased and more reliable cross-country genomic predictions.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
C. Bengtsson, H. Stalhammar, J. R. Thomasen, S. Eriksson, W. F. Fikse, E. Strandberg
Summary: This study compared mating allocations in Nordic Red Dairy Cattle using genomic information, optimizing economic scores while considering genetic level, semen cost, and recessive genetic defects. High correlations were found between pedigree and genomic relationship measures. Linear programming efficiently maximized economic scores for all herds studied, suitable for mating software used by advisors and farmers.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Yvan Bienvenu Niyonzima, Erling Strandberg, Claire D'Andre Hirwa, Maximilian Manzi, Martin Ntawubizi, Lotta Rydhmer
Summary: This study investigated the impact of season and maximum daily THI on milk yield in different breeds of cows in a tropical climate. The results showed that THI had a negative effect on milk yield, with purebred Ankole cows having the lowest yield. The study also highlighted differences in adaptation to hot and humid climates between different breed groups.
TROPICAL ANIMAL HEALTH AND PRODUCTION
(2022)
Article
Agriculture, Dairy & Animal Science
Harmen P. Doekes, Henk Bovenhuis, Tom V. L. Berghof, Katrijn Peeters, Jeroen Visscher, Han A. Mulder
Summary: Resilience is the capacity of an animal to withstand disturbances and quickly recover. A study was conducted to analyze resilience indicators and natural antibodies in a purebred layer line. The findings indicate that these traits are likely controlled by multiple genes and no significant associations were found.
Article
Agriculture, Dairy & Animal Science
Susanne Eriksson, Erling Strandberg, Anna M. Johansson
Summary: Swedish Red and Swedish Holstein, the dominant dairy cattle breeds in Sweden, have undergone significant changes in genomic diversity and inbreeding over the past half-century. The study used genotyping data from old and recent bulls to analyze different measures of homozygosity, genomic inbreeding, relatedness, and allele frequency changes. The results showed that the inbreeding level was higher in the past but has decreased, although recent years have seen an increase in inbreeding coefficients and homozygosity in Swedish Holstein. The findings highlight the importance of considering these factors in future breeding strategies.
JOURNAL OF ANIMAL BREEDING AND GENETICS
(2023)
Review
Meteorology & Atmospheric Sciences
Claudia Hahn, Irene Garcia-Marti, Jacqueline Sugier, Fiona Emsley, Anne-Lise Beaulant, Louise Oram, Eva Strandberg, Elisa Lindgren, Martyn Sunter, Franziska Ziska
Summary: The number of individuals with private weather stations (PWS) sharing meteorological measurements online is increasing globally. While the high density of weather observations could help monitor small-scale weather phenomena, ensuring data quality and quality control are crucial. The interest in and usage of PWS data among National Meteorological & Hydrological Services (NMHS) is growing, leading to enhanced knowledge exchange and integration of PWS measurements into operational workflows.
Article
Agriculture, Dairy & Animal Science
Anahit Nazari-Ghadikolaei, Freddy Fikse, Asa Gelinder Viklund, Susanne Eriksson
Summary: Assessment protocols for Swedish Warmblood horses include linear scale scoring of conformation, gait, and jumping traits introduced in 2013. Factor analysis was used to investigate the relationship between evaluated and linearly scored traits. Results showed that factor analysis can help reduce the number of traits needed for genetic evaluation or genomic analysis.
JOURNAL OF ANIMAL BREEDING AND GENETICS
(2023)
Article
Agriculture, Dairy & Animal Science
I. Hansson, A. Silvera, K. Ren, S. Woudstra, A. Skarin, W. F. Fikse, P. P. Nielsen, L. Ronnegard
Summary: Understanding the social interactions of dairy cows in group settings is crucial for improving herd management and optimizing animal health and welfare outcomes. This study aimed to identify the characteristics of cows that are associated with their number of social contacts in different functional areas, such as feeding and resting areas.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
C. Bengtsson, H. Stalhammar, J. R. Thomasen, W. F. Fikse, E. Strandberg, S. Eriksson
Summary: In this study, the mating allocation and genetic optimization in Holstein cattle were explored using genomic information. The researchers utilized two sets of data from genotyped bulls and applied linear programming to optimize economic scores. The results showed that it was possible to reduce genetic relationships and eliminate genetic defects without negatively affecting the genetic level. The study also highlighted the potential negative impact of economic value on monogenic traits.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Erling Strandberg, Linda Andersson, Ulf Emanuelson, Charlotte Reinhard Bjornvad, Sara Ringmark, Ake Hedhammar, Katja Hoglund
Summary: This study investigated the genetic variation of body weight within different dog breeds and found that on average about 50% of the total variation in body weight between dogs, within a breed, depends on genetic differences. There were rather small changes over time in the genetic predisposition for high or low body weight. In conclusion, body weight in dogs is highly heritable, but there is very little selection on it.
JOURNAL OF ANIMAL SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Paulina Berglund, Sreten Andonov, Erling Strandberg, Susanne Eriksson
Summary: This study investigated the possibility of broadening the breeding goal by selecting for racing time per km over different race lengths. It found that there was a strong genetic correlation between racing time per km at different distances, but some re-ranking among stallions based on distance-specific breeding values.
JOURNAL OF ANIMAL BREEDING AND GENETICS
(2023)
Meeting Abstract
Agriculture, Dairy & Animal Science
A. Edvardsson Rasmussen, C. Kronqvist, E. Strandberg, R. Bage, K. Holtenius
REPRODUCTION IN DOMESTIC ANIMALS
(2022)
Meeting Abstract
Agriculture, Dairy & Animal Science
P. Ask-Gullstrand, R. Bage, E. Strandberg, B. Berglund
REPRODUCTION IN DOMESTIC ANIMALS
(2022)