EAAP + WAAP + Interbull Congress 2023

Lyon, France - August 26th / September 1st, 2023

Interbull Sessions

Congress on Saturday and Sunday

Presentation 12 minutes + 3 minutes for questions.


Find all information about the program of the Interbull sessions

Saturday 26/8

8:00-10:00 Session I: new methodology (Room Prestige Gratte-Ciel, plenary session)
Chairman: Gerben DEJONG

Schedule Speaker Topic
8:00-8:15 Mattew Shaffer
(Interbull President)
and Jean-Paul Rault (FGE president)
8:15:8:30 Renzo Bonifazi Using genomic data to estimate genetic correlations between countries with different levels of connectedness.
8:30-8:45 Andres Legarra Effect of modelling unknown parent groups and metafounders on the historical genetic trend of fertility traits
8:45-9:00 Martin Schlather Software project ‘miraculix’: Efficient computations with large genomic datasets
9:00-9:15 Alexander Freudenberg Accelerating single-step evaluations through GPU offloading
9:15-9:30 Yury Tavyrikov Development of an analytical tool for animal genetic progress assessment based on gEBVs calculated with a single-step model, pedigrees, genotyping data and results of its on-farm implementation
9:30-9:45 Didier Boichard Methods to estimate erosion factors of genomic breeding values of candidates due to long-distance linkage disequilibrium
9:45-10:00 Lisa Hein The value of increased heterozygosity in dairy cattle

10:00-10:30 Break

10:30-12:00 Session II-A: Big data (Room Prestige Gratte-Ciel, parallel session)
Chairman: Ezequiel Luis Nicolazzi

Schedule Speaker Topic
10:30-10:45 Xiaolin Wu Breaking the bin: Why does continuous milking interval time matter for getting test-day milk yields right?
10:45-11:00 Niek Meijer Udder classification based on AMS-data
11:00-11:15 José A. Carrillo Implementation of adding discovered grandsires and great grandsires using constructed ID
11:15-11:30 Jeffrey R. O’Connell Quality and value of imputing gene tests for all animals
11:30-11:45 Raphael  Mrode Changes in the genome architecture of two groups of dairy bulls with marked differences in their direct genomic breeding values for production traits in the UK
11:45-12:00 Paul VanRaden Modeling identical twins, split embryos, and nuclear transfer clones in dairy cattle genetic evaluation

10:30-12:00 Session II-B: Sustainability (Room Gratte-Ciel 2&3, parallel session)
Chairman: Marija Klopcic

Schedule Speaker Topic
10:30-10:45 Claudia Kasper The genetic background of nitrogen use efficiency and methane emissions in Swiss dairy cows
10:45-11:00 Bjørg Heringstad Heritability of methane emission in young Norwegian Red bulls estimated from GreenFeed measures at the test station
11:00-11:15 Brian Van Doormaal Development of Methane Efficiency Evaluations for Canadian Holsteins
11:15-11:30 Marco Winters The EnviroCow index and its impact on the UK dairy industry’s carbon footprint
11:30-11:45 Karoline A. Bakke Breeding values for daily dry matter intake in Norwegian Red dairy cows and correlation to other traits
11:45-12:00 Sophie Aguerre Meta-analysis for heat tolerance traits in Holstein in France, the Netherlands and Spain

12:00-13:30 Lunch

13:30-15:00 Interbull Business meeting (Room Prestige Gratte-Ciel)

15:00-15:30 Break

15:30-17:30 Session III-A: Big data & experiences with Single Step (Room Prestige Gratte-Ciel, parallel session)
Chairman: Urs Schnyder 

Schedule Speaker Topic
15:30-15:45 Jan-Thijs van Kaam Inbreeding becomes a serious issue
15:45-16:00 Thomas Lawlor Including genetic diversity as part of the international breeding goal for Holsteins.
16:00-16:15 Dawid Słomian A comparison of genomically enhanced breeding values predicted by different single step models
16:15-16:30 Herwin Eding Experience with single-step GEBV validation in CRV Holstein-Friesian breeding program
16:30-16:45 Janez Jenko Approximate single step genomic predictions for Norwegian Red cattle
16:45-17:00 Gert Nieuwhof Inclusion of MACE proofs in single-step genomic analysis
17:00-17:15 Jason Reding Evaluating the effect of ssGBLUP on a composite beef cattle population with limited pedigree completeness
17:15-17:30 General discussion

15:30-17:30 Session III-B: Crossbreed (Room Gratte-Ciel 2&3, parallel session)
Chairman: Gert Pedersen Aamand

Schedule Speaker Topic
15:30-15:45 Judith Himmelbauer Investigation on the metafounder concept in ssGBLUP based on a simulated cattle population
15:45-16:00 Matti Taskinen Estimation of metafounder relationships for multibreed single-step genomic evaluation of Finnish beef breeds
16:00-16:15 Ana Guillenea Genomic evaluation of crossbred dairy cows considering breed origin of alleles
16:15-16:30 Timo Pitkänen Multibreed single-step genomic evaluation model for Finnish beef cattle
16:30-16:45 Kevin Byskov Beef on Dairy genomic evaluation for feed effiency, methane emission and meat quality
16:45-17:00 Haifa Splittorff Multi breed genetic evaluation of beef bulls used in dairy herds – emphasis on newest development
17:00-17:30 General discussion

19:30-23:00:  Interbull dinner, Brasserie Georges

Sunday 27/8 (1 room)

8:00-10:00 Session IV: experience with Single step (Room Prestige Gratte-Ciel, plenary session)
Chairman: Brian Van Doormaal 

Schedule Speaker Topic
8:00-8:15 Vincent Ducrocq Implementation of a single-step evaluation combining information on traits described by completely different models: the example of functional longevity
8:15:8:30 Zengting Liu Deregressed genomic breeding values from single-step evaluations of test-day traits using all genotype data
8:30-8:45 Herwin Eding Efficient approximation of reliability for genomic breeding values in large systems
8:45-9:00 Zengting Liu Application of the Interbull genomic reliability method for single-step evaluation of test-day and conformation traits in German Holsteins
9:00-9:15 Paul VanRaden Conclusions of the validation working group
9:15-9:30 General Discussion

9:30-10:00 Break

10:00-12:00 Session V: New traits [1] (Room Prestige Gratte-Ciel, plenary session)
Chairman: Laurent Journaux

Schedule Speaker Topic
10:00-10:15 Valentina Palucci New services
10:15-10:30 Allison Fleming Genomic Evaluations for Body Maintenance Requirements in Canadian Holsteins
10:30-10:45 Katarzyna Stachowicz Genetic trends in gestation length
10:45-11:00 Johannes Heise Genetic evaluation of persistency in extended lactations
11:00-11:15 Rodrigo Mota International evaluations for clinical mastitis in Brown Swiss
11:15-11:30 F. Galluzzo Implementation of a routine genetic evaluation of milk coagulation properties in Italian Holstein breed
11:30-11:45 Nicolas Gengler Developing a genomic evaluation system using MIR-predicted CH4 and MACE traits related to expected CH4 emissions
11:45-12:00 Attilio Rossoni Evaluating male fertility in Brown Swiss cattle combining multiple sources of information

12:00-13:30 Lunch

13:30-15:00 Interbull Business meeting (Room Prestige Gratte-Ciel)

15:00-15:30 BREAK

15:30-16:30 Session VI: New traits [2] (Room Prestige Gratte-Ciel, plenary session)
Chairman: Daniele Vicario

Schedule Speaker Topic
15:30-15:45 Fernando Macedo New international evaluation for carcass traits
15:45-16:00 Ezequiel Luis Nicolazzi New mutation within a common haplotype is associated with calf recumbency in Holsteins
16:00-16:15 Helene Leclerc A single-step genomic evaluation of claw health traits in French Holstein, Montbéliarde and Normande breeds
16:15-16:30 Ludmila Zavadilova Genomic Evaluation for Foot and Claw Disorders in Czech Holstein

16:30-17:15 Interbull Technical committee (Room Gratte-Ciel 1)

17:15-18:00 Interbull Steering Committee (Room Gratte-Ciel 1)

18:00 – Cocktail WAAP (open to Interbull participants)