Volume 2026 • Issue 1 • 2026
Animal welfare
Quantifying social genetic variance for feed efficiency in pigs
Pedro Nuñez, Sara Negro, Joaquim Casellas, Luis Varona and Noelia Ibáñez-Escriche
2026-02-26 Volume 2026 • Issue 1 • 2026
Sensitivity of genomic heritability and predictive ability to SNP-panel reduction in dairy cattle personality traits
Anita Seidel, Philipp Hasenpusch, Thore Wilder and Georg Thaller
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic determination of positive and negative social behavioural traits in pigs
Lucy Oldham, Victoria Lee, Tuan Nguyen, Mark Brims, Mhairi Jack, Alena Kadlecova, Rainer Roehe, Gareth Arnott, Craig Lewis, Gabriella Lima, Piero Seddaiu, Isaiah Spath, Kenneth Rutherford, Alistair Lawrence and Simon Turner
2026-02-26 Volume 2026 • Issue 1 • 2026
How genetic background and early post-mixing social interactions shape dynamic patterns of dyadic aggression in pigs
Xiaohan Jiang, Janice Siegford and Juan Steibel
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic evaluation of sow reproductive traits with selection based on free farrowing data: implications for current and future breeding program
Maja Iversen, Ellen Maud Langmoen-Kosaka, Dan Olsen, Justin Reimer and Laura Vargovic
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetics of maternal defensive aggressiveness in Swiss Landrace sows
Nicole Maffezzini, Negar Khayatzadeh, Simon Turner, Rainer Roehe, Ricardo Pong-Wong and Rick D’Eath
2026-02-26 Volume 2026 • Issue 1 • 2026
Improving offspring survival outcomes for mammalian livestock species
Kim Bunter, Jo-Anne Harper, Laura Vargovic, Peta Bradley, Daniel Brown and David Johnston
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic parameters and genome-wide signals for social network analysis traits from feeder replacement events in beef cattle
Julia Valente, Lucio Flavio Mota, Gustavo Roberto Rodrigues, Tainara Luana Soares, Joel Alves, Gustavo Henrique Borges, Karine Daenquele Pinto, Luís Fernando Araujo and Maria Eugênia Mercadante
2026-02-26 Volume 2026 • Issue 1 • 2026
Swine inflammation and necrosis syndrome and its genetic association with repeated skin damage scores
Arielly Garcia, Natalia Leite, Roos Vogelzang, Renata Rocha, Arjan Neerhof, Egbert Knol, Simone Guimarães and Daniela Lourenco
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic relationship between feather cover and survival in crossbred laying hens
Iliyass Biada, David Pintado, Cristina Casto-rebollo and Noelia Ibáñez-Escriche
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic analysis and simulation of locomotion and social traits in turkeys
Zhuoshi Wang, Harmen Doekes, Patrick Langenhuizen, Bram Visser, Jeff Mohr, Ryley Vanderhout, Peter de With and Piter Bijma
2026-02-26 Volume 2026 • Issue 1 • 2026
Neonatal piglets exhibit differential gene expression in brain and adrenal tissue associated with maternal resilience to social stress
Andrea Luttman, Nancy Raney and Catherine Ernst
2026-02-26 Volume 2026 • Issue 1 • 2026
Sustainability & efficiency
Potential for genetic selection of feed efficiency traits in Holstein dairy calves
Avalon Phillips, Flavio Schenkel, Bayode Makanjuola, Isis Hermisdorff, Michael Steele, Filippo Miglior, Christine Baes and Ricarda Jahnel
2026-02-26 Volume 2026 • Issue 1 • 2026
Lifetime Net Merit Index ($NM) and the correlated response on methane emissions
Guillermo Martinez-Boggio, John Cole, Juan Tricarico, Kent Weigel and Francisco Peñagaricano
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic correlations between measured methane and production traits improved prediction accuracy for methane in Australian Merino sheep
Michael Aldridge, Daniel Brown, Peter Fitzgerald, Edward Clayton, Beth Paganoni, Andrew Thompson, Bronwyn Clarke, Suzanne Mortimer, Victor Oddy and Julius van der Werf
2026-02-26 Volume 2026 • Issue 1 • 2026
Alternative approaches for the incorporation of a methane trait into genetic evaluations
Shalini Abeykoon, Nóirín McHugh, Craig Murphy, Roy Sleator and Peter Amer
2026-02-26 Volume 2026 • Issue 1 • 2026
The genetic background of fiber digestibility and nitrogen use efficiency in dairy cattle
Eugenie Guennoc, Margreet Edens, Myrthe Gilbert, Jan Dijkstra and Henk Bovenhuis
2026-02-26 Volume 2026 • Issue 1 • 2026
Derivation of energy allocation coefficients to growth and exploration of its genetic background in American Angus cattle
Qianqian Huang, Nicolas Friggens, Hinayah Oliveira, Allan Schinckel, Guilherme Rosa, Andre Garcia, Kelli Retallick, Miguel Santana and Luiz Brito
2026-02-26 Volume 2026 • Issue 1 • 2026
Is eating less better? Relationship of feed efficiency with production traits in New Zealand sheep
Rebecca Clarke, Timothy Bilton, Kevin Knowler, Suzanne Rowe and Patricia Johnson
2026-02-26 Volume 2026 • Issue 1 • 2026
Genome-wide association study reveals shared genetic architecture of feed efficiency between calves and first parity Holstein cows
Isis Hermisdorff, Bruno Galindo, Avalon Phillips, Ricarda Jahnel, Filippo Miglior, Christine Baes and Flavio Schenkel
2026-02-26 Volume 2026 • Issue 1 • 2026
Animal breeding policies and strategies in south Asia for sustainable genetic improvement
Md. Younus Ali and Ashis Kumar Samanta
2026-02-26 Volume 2026 • Issue 1 • 2026
Effect of differences in modelling ewe weight on methane intensity
Emma Dods, Nicola Lambe and Janet Roden
2026-02-26 Volume 2026 • Issue 1 • 2026
Estimating heritability of deep phenotypes for feed efficiency in dairy cows
Niran Adhikari, Aart van der Linden, Birgit Gredler-Grandl and Roel Veerkamp
2026-02-26 Volume 2026 • Issue 1 • 2026
From productivity to climate action: harnessing community-based breeding to lower methane emissions in Ethiopian smallholder sheep systems
Emna Rekik, Maria Wurzinger, Johann Sölkner, Tesfaye Getachew, Barbara Rischkowsky, Dawit Solomon and Aynalem Haile
2026-02-26 Volume 2026 • Issue 1 • 2026
Residual heat production: a novel trait for dairy cow efficiency?
Federica Marín, Guillermo Martinez-Boggio, Mariana Carriquiry, Kristen Parker Gaddis, James Koltes, José Eduardo Santos, Ransom Baldwin, Kenneth Kalscheur, Elizabeth French, Robert Tempelman, Michael VandeHaar, Kent Weigel, Heather White and Francisco Peñagaricano
2026-02-26 Volume 2026 • Issue 1 • 2026
Reducing carbon footprint while maintaining flock profitability: the finishing touch for the Irish sheep industry
Thierry Pabiou, Sean Godfrey, Jaynell Anderson, Edel O’Connor, Jonathan Herron and Nóirín McHugh
2026-02-26 Volume 2026 • Issue 1 • 2026
Diurnal patterns of methane and carbon dioxide emissions associated with breeding sheep for divergent methane yield
Timothy Bilton, Arjan Jonker, Sharon Hickey, Fern Booker, Brenna Dobson-Hill, John McEwan and Suzanne Rowe
2026-02-26 Volume 2026 • Issue 1 • 2026
How does use of the methane mitigating feed additive Bovaer affect animal variance and ranking of methane and yield traits in dairy cattle?
Rasmus Stephansen, Jan Lassen, Peter Løvendahl, Martin Bjerring, Trine Villumsen and Mogens Lund
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic variation for methane emissions and meat fatty acid composition in a New Zealand sheep population implicates rumen microbiome metabolism
Simon Kelly, Timothy Bilton, Michael Agnew, Fern Booker, Anna Shortall, Jacqueline Peers-Adams, Wendy Bain, Ian Hampton, Kathryn McRae, Kenneth Dodds, Patricia Johnson, John McEwan and Suzanne Rowe
2026-02-26 Volume 2026 • Issue 1 • 2026
Validation study for methane breeding values with Greenfeed methane recordings on commercial Dutch dairy farms
Chantal van Gemert, Lisanne Koning, Johan Snijder, Birgit Gredler-Grandl, Roel Veerkamp and Yvette de Haas
2026-02-26 Volume 2026 • Issue 1 • 2026
Africa GENetic Evaluation Service (AGENES): A pipeline for routine genetic and genomic evaluations
Getinet Tarekegn, Raphael Mrode, Eileen Wall, Abbygail Wells, Jennifer Volk, Mazdak Salavati, Massimiliano Cosso, Appolinaire Djikeng, Mizeck Chagunda, Okeyo Mwai and Mike Coffey
2026-02-26 Volume 2026 • Issue 1 • 2026
A life cycle assessment for male-skew genetics: Harnessing sex determination as an environmental mitigation strategy in beef-on-dairy production
Ellen Lai and Matthew Cleveland
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic parameters for dry matter intake, methane emissions, nitrogen excretion, and carcass traits in Hereford cattle
MacKenzie Griffin, Scott Speidel, Stacy Sanders, Shane Bedwell and Mark Enns
2026-02-26 Volume 2026 • Issue 1 • 2026
Accelerating methane phenotyping worldwide for the Jersey breed through the global methane genetics initiative
Rasmus Stephansen, Trine Villumsen, Helen Schneider, Olivier Bulot, Victoria Storing, Coralie Machefert, Christine Baes and Filippo Miglior
2026-02-26 Volume 2026 • Issue 1 • 2026
Effects of selection weight and phenotyping intensity of enteric methane emission in national sheep breeding objectives
Xijiang Yu, Lu Cao, Jette Jakobsen, Gareth Difford, Peer Berg and Bente Åby
2026-02-26 Volume 2026 • Issue 1 • 2026
Heritability and genetic correlation of methane production measured using GreenFeed and portable accumulation chambers in dairy heifers
Jessica Douie, Nicolas Lopez-Villalobos, Lorna McNaughton, Olivia Spaans, Kathryn Tiplady, Richard Spelman, Suzanne Rowe and Timothy Bilton
2026-02-26 Volume 2026 • Issue 1 • 2026
Emission reductions and economic ramifications of methane selection within Irish ruminant breeding indexes
David Kenny, Jude Sise, Peter Amer, Ross Evans and Fiona Hely
2026-02-26 Volume 2026 • Issue 1 • 2026
Augmenting saved feed index with carbon dioxide breeding values
Martin Lidauer, Ayo Salaudeen, Tomasz Stefański, Pekka Huhtanen, Ali Bayat, Riitta Kempe and Enyew Negussie
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic relationship between methane emissions and rumen volume in sheep
Nicola Lambe, Nóirín McHugh, Ann McLaren, Fiona McGovern, Emma Dods, Karolina Kaseja and Janet Roden
2026-02-26 Volume 2026 • Issue 1 • 2026
Predicting methane production in dairy cows using milk spectra and genomic data
Guillermo Martinez-Boggio, Kristen Parker Gaddis, Leonora James, Ranga Appuhamy, James Koltes, Efstathios Sarmikasoglou, Robert Tempelman, Michael VandeHaar, RL Baldwin, KF Kalscheur, EA French, José Eduardo Santos, Hilario Mantovani, Heather White, Kent Weigel and Francisco Peñagaricano
2026-02-26 Volume 2026 • Issue 1 • 2026
Experiences with joint modeling of feed efficiency and methane emission, using large-scale commercial data in Nordic Holstein.
Rasmus Stephansen, Just Jensen, Mogens Lund, Peter Løvendahl, Bjarke Poulsen, Trine Villumsen, Martin Bjerring and Jan Lassen
2026-02-26 Volume 2026 • Issue 1 • 2026
Empowering livestock productivity for sustainable food security through genetic improvement
Bruno Santos, Peter Amer, Anouk Schurink, Chanda Nimbkar, Barbara Rischkowsky, Tesfaye Getachew, Mourad Rekik, Joram Mwacharo, Jolene van Tonder, Doug Bjelland, Maryam Yassi and Aynalem Haile
2026-02-26 Volume 2026 • Issue 1 • 2026
Selection response for reduced methane emissions through microbiome-driven breeding in a divergent selection experiment
Rainer Roehe, Tuan Nguyen, Gemma Miller, Joana Lima, Marina Martínez-Álvaro, Matthew Cleveland and Carol-Anne Duthie
2026-02-26 Volume 2026 • Issue 1 • 2026
Greenhouse gas emissions of Holstein cows compared with Holstein, Jersey, Montbéliarde, Normande, and Viking Red crossbred cows
Brad Heins, Isaac Haagen and Isaac Salfer
2026-02-26 Volume 2026 • Issue 1 • 2026
Novel microbiome-driven breeding strategies to reduce methane production while avoiding adverse effects on growth
Tuan Nguyen, Marina Martínez-Álvaro, Joana Lima, Matthew Cleveland and Rainer Roehe
2026-02-26 Volume 2026 • Issue 1 • 2026
The genetic relationship between liveweight in dairy youngstock and lactating cows in New Zealand dairy cattle.
Lorna McNaughton, Ahmed Ismael, Ric Sherlock, Vinzent Boerner, Bevin Harris and Richard Spelman
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic parameters of feed intake, eating behaviour, efficiency and body weight recorded using 3D cameras in three dairy cattle breeds
Jan Lassen, Christian Bengtson, Kasia Kupisiewicz and Rasmus Stephansen
2026-02-26 Volume 2026 • Issue 1 • 2026
Incorporating alternative methane metrics into sheep breeding objectives: implications for genetic gain and emission efficiency
Dermot Kelly, Deirdre Purfield, Thierry Pabiou, Fiona McGovern and Nóirín McHugh
2026-02-26 Volume 2026 • Issue 1 • 2026
Genetic selection for reduced enteric methane emissions in Irish beef cattle: measurable gains with minimal trade-offs
Clodagh Ryan, Deirdre Purfield, David Kenny, Paul Crosson and Ross Evans
2026-02-26 Volume 2026 • Issue 1 • 2026
Genomic scans for dry matter intake, consistency of dry matter intake, and residual feed intake in lactating dairy cows using imputed whole-genome sequence data
Bárbara Nascimento, Kristen Parker Gaddis, James Koltes, José Eduardo Santos, Robert Tempelman, Michael VandeHaar, Kent Weigel, Heather White, Brian Kirkpatrick and Francisco Peñagaricano
2026-02-26 Volume 2026 • Issue 1 • 2026