Pia Schwarz
@pfschwarz.bsky.social
PhD candidate @ Coughlan Lab @yale_eeb | evolutionary genetics & genomics, speciation & plant immunity 🌸🧬|@UBBiology 🎓'22|
former D1 student-athlete 🎾 | 🇩🇪
former D1 student-athlete 🎾 | 🇩🇪
Reposted by Pia Schwarz
At the same time, Dr. Megan Frayer was finding that these two species have a ✨sorted✨ history of gene flow, including introgression of a large chromosomal inversion that has been previously implicated in hybrid seed inviability
a woman is holding a piece of paper with the words what the what written on it
ALT: a woman is holding a piece of paper with the words what the what written on it
media.tenor.com
September 25, 2025 at 9:29 PM
At the same time, Dr. Megan Frayer was finding that these two species have a ✨sorted✨ history of gene flow, including introgression of a large chromosomal inversion that has been previously implicated in hybrid seed inviability
Reposted by Pia Schwarz
but here's where things get spicy: in her rotation project, Pia showed that the genetic basis of hybrid seed inviability is in fact SHARED between two such incidences involving two different (and phylogenetically distinct) species.
a man in a red jacket is eating popcorn with the words oh this is getting spicy below him
ALT: a man in a red jacket is eating popcorn with the words oh this is getting spicy below him
media.tenor.com
September 25, 2025 at 9:29 PM
but here's where things get spicy: in her rotation project, Pia showed that the genetic basis of hybrid seed inviability is in fact SHARED between two such incidences involving two different (and phylogenetically distinct) species.
Reposted by Pia Schwarz
She followed up with super awesome embryo rescues to show that these incidences of hybrid seed inviability arise in the endosperm, & that hybrid seeds show parent-of-origin biased growth effects, following some predictions that hybrid seed inviability may be evolving via parental conflict
September 25, 2025 at 9:29 PM
She followed up with super awesome embryo rescues to show that these incidences of hybrid seed inviability arise in the endosperm, & that hybrid seeds show parent-of-origin biased growth effects, following some predictions that hybrid seed inviability may be evolving via parental conflict
Reposted by Pia Schwarz
Then Hagar stepped up to the plate: she showed that RI follows a geographic rather than phylogenetic pattern: populations that are closer together have the same patterns of crossing. Importantly, these patterns TRANSCEND SPECIES BOUNDARIES, creating a complex landscape of hybrid seed inviability.
a man in a tie is sitting at a desk with his mouth open
ALT: a man in a tie is sitting at a desk with his mouth open
media.tenor.com
September 25, 2025 at 9:29 PM
Then Hagar stepped up to the plate: she showed that RI follows a geographic rather than phylogenetic pattern: populations that are closer together have the same patterns of crossing. Importantly, these patterns TRANSCEND SPECIES BOUNDARIES, creating a complex landscape of hybrid seed inviability.
Reposted by Pia Schwarz
This is work that I first started as a postdoc: I was befuddled about why we saw hybrid seed inviability evolve so many dang times in such a short period of time in monkey flowers, so I started just doing a ton of crosses.... like truly an unhinged amount...
a woman is looking at a triangle with a mathematical equation written on it .
ALT: a woman is looking at a triangle with a mathematical equation written on it .
media.tenor.com
September 25, 2025 at 9:29 PM
This is work that I first started as a postdoc: I was befuddled about why we saw hybrid seed inviability evolve so many dang times in such a short period of time in monkey flowers, so I started just doing a ton of crosses.... like truly an unhinged amount...
Reposted by Pia Schwarz
This was a HUGE effort, taking years of diligent work. Hongfei was a true leader, and I'm really proud of this cool piece. We'd love any feedback y'all might have. www.biorxiv.org/content/10.1...
Unique genetic bases of repeated life-history divergence associated with high altitude adaptation in Mimulus perennials
Understanding evolutionary repeatability is a central question in biology, as it informs how predictably organisms respond to similar selection pressures. However, the extent to which phenotypic repea...
www.biorxiv.org
September 24, 2025 at 4:55 PM
This was a HUGE effort, taking years of diligent work. Hongfei was a true leader, and I'm really proud of this cool piece. We'd love any feedback y'all might have. www.biorxiv.org/content/10.1...
Reposted by Pia Schwarz
Lots of cool data to dig into, but the big take homes: Phenotypic evo is repeatable, but the genetic bases of these traits is largely not. Of the QTL we do find in more than one cross, QTL with large effect sizes or those implicated in more than one trait tend to pop up in more than one cross!!!!
September 24, 2025 at 4:55 PM
Lots of cool data to dig into, but the big take homes: Phenotypic evo is repeatable, but the genetic bases of these traits is largely not. Of the QTL we do find in more than one cross, QTL with large effect sizes or those implicated in more than one trait tend to pop up in more than one cross!!!!