Luc Janss (@lljanss) profile picture

Luc Janss

@lljanss

Professor, plant genetics and breeding, big data, prediction, Aarhus University, Denmark.

 Arhus, Denmark
Joined November 2012
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Photo by Luc Janss (@lljanss)Photo by Luc Janss (@lljanss)Photo by Luc Janss (@lljanss)Photo by Luc Janss (@lljanss)Photo by Luc Janss (@lljanss)
A little more than 1 week left to register for the summer course on genomic prediction with me and @guillramstein👇
QGG AU (@QGG_AU) profile pictureQGG AU@QGG_AU28 Feb 2025
Summer course 4-8 August 2025 at Aarhus University, with professor Luc Janss @lljanss as lecturer🌞: #GenomicPrediction in #Animals and #Plants Read more here 👉international.au.dk/educatio… Application deadline is 18 March 2025❗
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Luc Janss retweeted
QGG AU (@QGG_AU) profile picture
QGG AU@QGG_AU20 Nov 2024
New article out by Marta Malinowska, Abraham Smith, Anja Ruud, Luc Janss, Lene Krusell, Jens Due Jensen & Torben Asp: Automated seminal root angle measurement with corrective annotation 🌱 Find the article here: doi.org/10.1093/aobpla/plae0… #PlantBreeding #Automation #Phenotyping
Automated seminal root angle measurement with corrective annotation

Automated seminal root angle measurement with corrective annotation

Abstract. Measuring seminal root angle is an important aspect of root phenotyping, yet automated methods are lacking. We introduce SeminalRootAngle, a nove

academic.oup.com
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I'll follow ...
Image from Luc Janss (@lljanss)
Jessica Rutkoski (@JRutkoski) profile pictureJessica Rutkoski@JRutkoski15 Nov 2024
Shhhh, there’s a new app and I’m on it👇
Image from Jessica Rutkoski (@JRutkoski)
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Luc Janss retweeted
QGG AU (@QGG_AU) profile picture
QGG AU@QGG_AU29 Jan 2024
PLEASE RT 🌞 QGG's #SummerUniversity courses are online, and you can find an overview here: qgg.au.dk/en/education/study… Deadline for application is 15 March 2024 🌞 @dougthespeed @GoutamSahana @GuillRamstein @lljanss
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Nice article by Kenny et al. (doi.org/10.1186/s12711-023-0…) on the variation in genomic relationships in full sibs. Raw relationships are avg 0.55 up to 0.85, after correcting for parent relationships and inbreeding they are nicely 0.5 with a range 0.4-0.6, as expected by theory🙂👍

Variation in the proportion of the segregating genome shared between full-sibling cattle and sheep

Genetics Selection Evolution - The construction of covariance matrices that account for the genetic relationships among individuals, using pedigree or genotype data, is integral to genetic...

link.springer.com
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And the faba bean papers keep coming out, this one is from former PhD student Cathrine Skovbjerg 👇
TheorApplGenet (@TheorApplGenet) profile pictureTheorApplGenet@TheorApplGenet20 May 2023
Global diversity in faba bean: Identification of QTLs for key agronomic traits and genomic signatures of selection @stiguandersen rdcu.be/danWg
Image from TheorApplGenet (@TheorApplGenet)
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Luc Janss retweeted
QGG AU (@QGG_AU) profile picture
QGG AU@QGG_AU11 May 2023
New article out by @eB_elesandro @lljanss et al: #Genetic architecture of inter-specific and -generic #grass #hybrids by network analysis on #multi-omics #data @DLF_Seeds @BMC_series Find the article here bit.ly/42rq5fs
Image from QGG AU (@QGG_AU)
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With contributions of @QGG_AU by @eB_elesandro and me and lead author colleague @stiguandersen of @MolBiolAU @AarhusUni. Great work @murukarthickj and other first and co-authors 🤗.
Murukarthick Jayakodi (@murukarthickj) profile pictureMurukarthick Jayakodi@murukarthickj8 Mar 2023
Marking a milestone in #plant #genomics!!! An amazing team of scientists around the globe unraveled the giant #fababean genome (~ 13 Gb), which is now out @Nature ..Huge congrats to all authors!!! #plantprotein @LeibnizIPK @LeibnizWGL nature.com/articles/s41586-0…
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Don't know what it is with #plantsvszombies but the course is on #GenomicPrediction in #animals and #plants. The contents have been extended to address kernel methods for GxE and non-additive genetics and again with @GuillRamstein on the lecturing team.
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Luc Janss retweeted
QGG AU (@QGG_AU) profile picture
QGG AU@QGG_AU10 Jun 2022
We have an available position as professor in Crop Genetics at QGG Flakkebjerg. Deadline 1 July 2022. Read more here: bit.ly/3mzJZ4B @mogens_lund @lljanss
Image from QGG AU (@QGG_AU)
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Our cool paper on clover genetics with image analysis by machine learning, prediction of synthetics that were actually made and grown to verify and more 👇
stiguandersen (@stiguandersen) profile picturestiguandersen@stiguandersen12 Oct 2021
Our latest results on genetics of white clover yield based on continuously tracking growth 3600 plants are now published in @TheorApplGenet rdcu.be/czgaX #legumes #plantgenetics @smoeskjaer @lljanss @DLF_Seeds
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A few weeks left until the application deadline (Sept. 30th) for these fully-funded positions in our group @QGG_AU: PhD in evolutionary genomics and quantitative genetics, postdoc in machine learning and bioinformatics nature.com/naturecareers/job… nature.com/naturecareers/job…
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Good news from our NORFAB project with @GeuFloresF doing fantastic research resolving the vicine / convicine pathways in faba bean 👍👇
stiguandersen (@stiguandersen) profile picturestiguandersen@stiguandersen5 Jul 2021
A big step towards faba beans free from vicine and convicine. @GeuFloresF @alanhschulman @fred_stoddard @D_O_Sullivan @NaturePlants #fababean #favism #legumes doi.org/10.1038/s41477-021-0…
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MeSCoT: The tool for quantitative trait simulation through the mechanistic modelling of genes’ regulatory interactions academic.oup.com/g3journal/a… @QGG_AU @BovReg @mogens_lund @lljanss
MeSCoT: the tool for quantitative trait simulation through the mechanistic modeling of genes’...

MeSCoT: the tool for quantitative trait simulation through the mechanistic modeling of genes’...

Abstract. This work represents a novel mechanistic approach to simulate and study genomic networks with accompanying regulatory interactions and complex me

academic.oup.com
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I reviewed a paper where authors had increased their data size by adding genomic predicted phenotypes, and then did GWAS. Don't do it, it is flawed! The predicted phenos are basically copies of the training SNP effects, inflating the test statistics for GWAS. End of review ☹️
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Congratulations Pernille! More #betterbarley (and grass) from @QGG_AU. I was involved in Pernille's thesis to map markers for root number in #barley, where mixed models failed but Bayesian mapping succeeded 🙂. Hopefully ready to submit soon!
QGG AU (@QGG_AU) profile pictureQGG AU@QGG_AU26 Oct 2020
Congratulations to Pernille Bjarup Hansen who successfully defended her PhD thesis Friday on #Genetic Dissection and #Prediction of Complex #Traits in #Barley and Festulolium Grasses. #QGG_AU bit.ly/2G399Hg @lljanss #Torben_Asp
Image from QGG AU (@QGG_AU)
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Very proud of my PhD student Charlotte who successfully defended her thesis on improving malting quality in winter #barley with Sejet Plant Breeding. Results already in use, #betterbarley for Denmark 🇩🇰🙂. Congratulations dr. Robertsen! @QGG_AU. phd.tech.au.dk/about-us/curr…
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My Genomic Prediction course is running again in the summer, now back to back with a course on Gene Mapping by @GoutamSahana. The links below lead to pages for master students, but these courses are also open to PhD students and others. @QGG_AU @AarhusUni
Goutam Sahana (@GoutamSahana) profile pictureGoutam Sahana@GoutamSahana17 Feb 2020
Two summer courses at Aarhus University. Gene Mapping, 03-07 August 2020, kursuskatalog.au.dk/en/cours… and Genomic Predictions in Animals and Plants, 10-14 August 2020 kursuskatalog.au.dk/da/cours… Practical information at international.au.dk/educatio… @qgg_AU @lljanss
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Attenting a UPOV @UPOVint (plant variety protection) meeting in Hangzhou China to learn everything about DUS testing. In the coffee break we do cake testing 😋😀
Image from Luc Janss (@lljanss)
Image from Luc Janss (@lljanss)
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Incremental average and SD by awk. awk '{dx=$1-mx;mx+=dx/NR;dx2=dx*($1-mx)-vx} NR>1{vx+=dx2/(NR-1)} END{print mx,sqrt(vx)}' file Covariance is available by extending this idea. I saw this in Dr. Larry Schaeffer's course note although it should be a well-known method.
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