Pauline Raimondeau
@paulineraim.bsky.social
Postdoc Yale EEB | Plant comparative genomics & adaptation 🌿
The Edwards lab (edwardslab.org) is looking for a new post-doctoral research associate to work on the phylogenomics of Montiaceae, a really cool group of plants 🤩 Details below
May 8, 2024 at 8:05 PM
The Edwards lab (edwardslab.org) is looking for a new post-doctoral research associate to work on the phylogenomics of Montiaceae, a really cool group of plants 🤩 Details below
OR distyly evolved multiple times in the family, its evolution being facilitated by the use of this ancestrally duplicated region. After all, there seems to be a high level of convergence in this trait among flowering plants, why not within the family? 🤔
April 15, 2024 at 9:16 PM
OR distyly evolved multiple times in the family, its evolution being facilitated by the use of this ancestrally duplicated region. After all, there seems to be a high level of convergence in this trait among flowering plants, why not within the family? 🤔
Could be that distyly was ancestrally present and that the olive S-locus is a degenerated distyly supergene. EXCITING!
April 15, 2024 at 5:07 PM
Could be that distyly was ancestrally present and that the olive S-locus is a degenerated distyly supergene. EXCITING!
I just want to add a few words about some exciting questions that our results rise about the evolution of self-incompatibility system in this family and elsewhere. We can't conclude about which system evolved first, a long lasting question in the field.
April 15, 2024 at 5:05 PM
I just want to add a few words about some exciting questions that our results rise about the evolution of self-incompatibility system in this family and elsewhere. We can't conclude about which system evolved first, a long lasting question in the field.
We build phylogenies for those genes and revealed they seems to have been duplicated at the same time, in a common ancestor of Oleaceae and their sister family (where distyly has also been reported).
April 15, 2024 at 4:54 PM
We build phylogenies for those genes and revealed they seems to have been duplicated at the same time, in a common ancestor of Oleaceae and their sister family (where distyly has also been reported).
We identified a small subset of differentially expressed genes. And guess what? We have an overlap with the genes we identified within the hemizygous region in olive!
April 15, 2024 at 4:48 PM
We identified a small subset of differentially expressed genes. And guess what? We have an overlap with the genes we identified within the hemizygous region in olive!
Let me introduce you to the Mediterranean jasmine! To explore a potential link between the two incompatibility systems, we performed differential gene expression between floral buds from short and long style morphs of this species.
April 15, 2024 at 4:45 PM
Let me introduce you to the Mediterranean jasmine! To explore a potential link between the two incompatibility systems, we performed differential gene expression between floral buds from short and long style morphs of this species.
What was great with this new assembly is that we were able to resolve haplotypes! So we were able to directly see what's hidden behind the region identified with our genome scans. A large indel (700kb) present in only one of the two incompatibility group.
April 15, 2024 at 4:35 PM
What was great with this new assembly is that we were able to resolve haplotypes! So we were able to directly see what's hidden behind the region identified with our genome scans. A large indel (700kb) present in only one of the two incompatibility group.
Then, we had the opportunity to sequence the genome of an endangered olive subspecies, only present in relict populations in the Hoggar Mountains of Sahara.
April 15, 2024 at 4:31 PM
Then, we had the opportunity to sequence the genome of an endangered olive subspecies, only present in relict populations in the Hoggar Mountains of Sahara.
We used different types of genome scans and found evidence suggestive of a hemizygous supergene!
April 15, 2024 at 4:23 PM
We used different types of genome scans and found evidence suggestive of a hemizygous supergene!
In addition to being an evolutionary mystery, this system is also of interest for olive production. It restricts varietal choice! With such a system, there's a 50% chance of being incompatible with any other tree!
April 15, 2024 at 4:15 PM
In addition to being an evolutionary mystery, this system is also of interest for olive production. It restricts varietal choice! With such a system, there's a 50% chance of being incompatible with any other tree!