Remco Stam
@rstam.bsky.social
Professor of Phytopathology | Kiel University
| Crop wild relatives and their pathogens | Likes quantitative and qualitative resistance mechanisms & popgen
| Crop wild relatives and their pathogens | Likes quantitative and qualitative resistance mechanisms & popgen
My team is adapting to work in Northern Germany. Besides tomato, we started a project on Quantitative Disease Resistance in Rapeseed. The field's looking good, let's catch some pathogens!
November 13, 2025 at 10:30 AM
My team is adapting to work in Northern Germany. Besides tomato, we started a project on Quantitative Disease Resistance in Rapeseed. The field's looking good, let's catch some pathogens!
We finally managed to take a lab picture! The last one was almost 2 years old. I'm so grateful to work with this amazing bunch of people!
October 24, 2025 at 2:46 PM
We finally managed to take a lab picture! The last one was almost 2 years old. I'm so grateful to work with this amazing bunch of people!
In terms of gene content, the clades don't differ much. Clade 2 is slightly more diverse and has a slightly higher TE content on average, but not exclusively.
Interestingly, Clade 1 has one unique Starship!
Interestingly, Clade 1 has one unique Starship!
October 1, 2025 at 12:34 PM
In terms of gene content, the clades don't differ much. Clade 2 is slightly more diverse and has a slightly higher TE content on average, but not exclusively.
Interestingly, Clade 1 has one unique Starship!
Interestingly, Clade 1 has one unique Starship!
Clade 2 seems to show some geographic structure; clade 1 does not. Interestingly, ALL other Alternaria alternata isolates NCBI from any host group with Clade 1.
October 1, 2025 at 12:34 PM
Clade 2 seems to show some geographic structure; clade 1 does not. Interestingly, ALL other Alternaria alternata isolates NCBI from any host group with Clade 1.
We hypothesised that Alternaria would possibly show a north/south gradient or some indication of climatic adaptation.
We find some hints, but our study does not have the resolution to capture this in detail.
But we consistently find two genetic clades! Both infect Tomato throughout the range.
We find some hints, but our study does not have the resolution to capture this in detail.
But we consistently find two genetic clades! Both infect Tomato throughout the range.
October 1, 2025 at 12:34 PM
We hypothesised that Alternaria would possibly show a north/south gradient or some indication of climatic adaptation.
We find some hints, but our study does not have the resolution to capture this in detail.
But we consistently find two genetic clades! Both infect Tomato throughout the range.
We find some hints, but our study does not have the resolution to capture this in detail.
But we consistently find two genetic clades! Both infect Tomato throughout the range.
Chart from last year... No big change in % of US applicants, or? . marie-sklodowska-curie-actions.ec.europa.eu/news/msca-po...
September 14, 2025 at 1:50 PM
Chart from last year... No big change in % of US applicants, or? . marie-sklodowska-curie-actions.ec.europa.eu/news/msca-po...
Looks like someone was really desperate for those Leaf samples and field trip notes we left in our car...
August 21, 2025 at 7:30 PM
Looks like someone was really desperate for those Leaf samples and field trip notes we left in our car...
I'm looking forward to three days of E3 workshop, on Ecology, Evolution and Economy. Organised by our Translational Evolution Graduate School and our partners in Leipzig.
August 11, 2025 at 1:28 PM
I'm looking forward to three days of E3 workshop, on Ecology, Evolution and Economy. Organised by our Translational Evolution Graduate School and our partners in Leipzig.
I feel there's something about the pizzas on the website of my new local pizzeria that will make @elisabethbik.bsky.social's heart beat faster... 😅
August 10, 2025 at 8:53 AM
I feel there's something about the pizzas on the website of my new local pizzeria that will make @elisabethbik.bsky.social's heart beat faster... 😅
Yesterday we celebrated the first two PhD defences from my lab in Kiel! Well done Dr @sev1panier.bsky.social and Dr Tominello-Ramirez!
The defences were excellent and they finished it off with the tradition of climbing the statue of meteor! de.m.wikipedia.org/wiki/Meteor_...
The defences were excellent and they finished it off with the tradition of climbing the statue of meteor! de.m.wikipedia.org/wiki/Meteor_...
July 3, 2025 at 5:34 AM
Yesterday we celebrated the first two PhD defences from my lab in Kiel! Well done Dr @sev1panier.bsky.social and Dr Tominello-Ramirez!
The defences were excellent and they finished it off with the tradition of climbing the statue of meteor! de.m.wikipedia.org/wiki/Meteor_...
The defences were excellent and they finished it off with the tradition of climbing the statue of meteor! de.m.wikipedia.org/wiki/Meteor_...
Are you looking for an exciting postdoc on quantitative disease resistance in Quinoa in collaboration with @kjschmid.bsky.social and others?? Apply now. The project can start as soon as possible!
May 20, 2025 at 10:45 AM
Are you looking for an exciting postdoc on quantitative disease resistance in Quinoa in collaboration with @kjschmid.bsky.social and others?? Apply now. The project can start as soon as possible!
We wanted to see how effectors are distributed in the field. This graph shows: for AvrStb6, we can find different effector haplotypes (different colours) collected in the same plant (each circle is a plant), even when these isolates are sometimes clones of each other (asterisk)!
April 25, 2025 at 4:47 AM
We wanted to see how effectors are distributed in the field. This graph shows: for AvrStb6, we can find different effector haplotypes (different colours) collected in the same plant (each circle is a plant), even when these isolates are sometimes clones of each other (asterisk)!
Effector regions are also higly affected by SNPs. In fact, when we make a PCA for the SNPs in effectors only, we see complete mixture of all the field! This means that all effector haplotypes exist in any field. MSN for individual effectors proves this. There are no private alleles in a field.
April 25, 2025 at 4:47 AM
Effector regions are also higly affected by SNPs. In fact, when we make a PCA for the SNPs in effectors only, we see complete mixture of all the field! This means that all effector haplotypes exist in any field. MSN for individual effectors proves this. There are no private alleles in a field.
Zymo field populations are extremely diverse. Looking at the distribution of the SNPs, there are very few invariable regions in each of the fields. Interestingly, fields show relatively low variation in dispensable chromosomes.
April 25, 2025 at 4:47 AM
Zymo field populations are extremely diverse. Looking at the distribution of the SNPs, there are very few invariable regions in each of the fields. Interestingly, fields show relatively low variation in dispensable chromosomes.
We obtained published data performed deep sampling of a field in the UK to assesseSNPs and SNP distribution.
The US field population has lower number of SNPs. In UK and CH fields, SNP accumulation flattens slowly after collection 160+ isolates. Fields show some separation in a PCA.
The US field population has lower number of SNPs. In UK and CH fields, SNP accumulation flattens slowly after collection 160+ isolates. Fields show some separation in a PCA.
April 25, 2025 at 4:47 AM
We obtained published data performed deep sampling of a field in the UK to assesseSNPs and SNP distribution.
The US field population has lower number of SNPs. In UK and CH fields, SNP accumulation flattens slowly after collection 160+ isolates. Fields show some separation in a PCA.
The US field population has lower number of SNPs. In UK and CH fields, SNP accumulation flattens slowly after collection 160+ isolates. Fields show some separation in a PCA.
First submission of a PhD thesis from my lab at CAU! Well done @sev1panier.bsky.social. You have done an absolutely amazing job helping build the lab and submitting a thesis in just under three years.
I'm looking forward to the defence (and some serious celebrations afterwards!) 🍾🥂
I'm looking forward to the defence (and some serious celebrations afterwards!) 🍾🥂
March 27, 2025 at 12:36 PM
First submission of a PhD thesis from my lab at CAU! Well done @sev1panier.bsky.social. You have done an absolutely amazing job helping build the lab and submitting a thesis in just under three years.
I'm looking forward to the defence (and some serious celebrations afterwards!) 🍾🥂
I'm looking forward to the defence (and some serious celebrations afterwards!) 🍾🥂
We also find cases (e.g NAC29) where the gene is present in all species, yet the defence-associated role can only be found in one species!
E.In four species, as in literature, this gene shows no role in defence. S. pennellii we see it central in the network and expression correlates with resistance
E.In four species, as in literature, this gene shows no role in defence. S. pennellii we see it central in the network and expression correlates with resistance
February 28, 2025 at 1:40 PM
We also find cases (e.g NAC29) where the gene is present in all species, yet the defence-associated role can only be found in one species!
E.In four species, as in literature, this gene shows no role in defence. S. pennellii we see it central in the network and expression correlates with resistance
E.In four species, as in literature, this gene shows no role in defence. S. pennellii we see it central in the network and expression correlates with resistance
We find that clusters of genes that are strongly resistance/defence associated in one species only partly associate with defence/resistance in the other species.
February 28, 2025 at 1:40 PM
We find that clusters of genes that are strongly resistance/defence associated in one species only partly associate with defence/resistance in the other species.
Using Weighted Gene Coexpression Network Analyses we then identified how the unique genes in each species are connected to the defence network (especially central hubs) and to which extent this regulation is shared between species. We first identify defence/resistance associated gene clusters
February 28, 2025 at 1:40 PM
Using Weighted Gene Coexpression Network Analyses we then identified how the unique genes in each species are connected to the defence network (especially central hubs) and to which extent this regulation is shared between species. We first identify defence/resistance associated gene clusters
Also the number of differentially expressed genes due to infection differs. Dispite the species sharing few genes, each species has a pretty unique response. Only aout 200 genes are shared and these also regulate defence in unrelated spp.
February 28, 2025 at 1:40 PM
Also the number of differentially expressed genes due to infection differs. Dispite the species sharing few genes, each species has a pretty unique response. Only aout 200 genes are shared and these also regulate defence in unrelated spp.
Fist we compared the genomes of our species. Each specieshs relatively few unique genes and phylostratum analyses showed that most genes are either very old or at least solanum-specific. This will help create context later.
February 28, 2025 at 1:40 PM
Fist we compared the genomes of our species. Each specieshs relatively few unique genes and phylostratum analyses showed that most genes are either very old or at least solanum-specific. This will help create context later.
Impromptu Phytopathology Friday Afternoon Chalk Talk by Honour McCann @honour.bsky.social.
What better way to start the weekend than with a drink and an amazing story about Pseudomonas evolution and Kiwi fruit infection?
What better way to start the weekend than with a drink and an amazing story about Pseudomonas evolution and Kiwi fruit infection?
February 14, 2025 at 3:33 PM
Impromptu Phytopathology Friday Afternoon Chalk Talk by Honour McCann @honour.bsky.social.
What better way to start the weekend than with a drink and an amazing story about Pseudomonas evolution and Kiwi fruit infection?
What better way to start the weekend than with a drink and an amazing story about Pseudomonas evolution and Kiwi fruit infection?
Lastly we show that within the UK field, different effector haplotypes (A) can be found within isolates that by previous definitions were considered clones and that these haplotypes co-occur within a single plant and/or lesion (B): each dot represents where the isolates were collected
January 4, 2025 at 7:32 AM
Lastly we show that within the UK field, different effector haplotypes (A) can be found within isolates that by previous definitions were considered clones and that these haplotypes co-occur within a single plant and/or lesion (B): each dot represents where the isolates were collected
The PCA for effectors (A) shows no between field structure! We find many diverse haplotypes of well-known effectors in all fields! This can be seen in the Minimum Spanning Networks for AvrStb6 (B), avr3D1 (C) and AvrStb9 (D)
January 4, 2025 at 7:32 AM
The PCA for effectors (A) shows no between field structure! We find many diverse haplotypes of well-known effectors in all fields! This can be seen in the Minimum Spanning Networks for AvrStb6 (B), avr3D1 (C) and AvrStb9 (D)