The Sobel Lab

Binghamton University (SUNY) - Dept of Biological Sciences

Biodiversity | Evolutionary ecology & genetics | Genomics

Flower color genetics in Mimulus lewisii and M. cardinalis

The next lab meeting will happen on Wednesday November 5th at noon, Science 3, G17. This week, still in preparation to Dr. Yao-Wu Yuan's visit, another of his papers will be discussed (see link below). I want to know more about the genetic and molecular basis underlying prezygotic barriers to reproduction between the bumblebee-pollinated Mimulus lewisii and the hummingbird-pollinated Mimulus cardinalis. Everyone is invited.

-Lucy

Yuan, Y-W., J. M. Sagawa, R. C. Young, B. J. Christensen, and H. D. Bradshaw Jr. 2013. Genetic dissection of a major anthocyanin QTL contributing to pollinator-mediated reproductive isolation between sister species of Mimulus. Genetics 194:255-263.

Transcriptional control of flower color in Mimulus

Dr. Yaowu Yuan will be visiting us in a couple of weeks, so in preparation, I'd like to read one of his most recent publications on the molecular basis of flower color evolution in Mimulus. We'll discuss this at lab meeting on Wednesday October 29th at noon. It's our Halloween lab meeting, so don't forget to come dressed as your favorite evolutionary geneticist.

Yuan et al. 2014 Transcriptional control of floral anthocyanin pigmentation in monkeyflowers (Mimulus). New Phytologist: early view

 

Molecular signals for the transition from annual to perennial life history traits

This week we're looking over a very-recent article that discusses the evolution of woodiness and perennial life history traits in one such species that diverged from a genus of herbaceous annuals (Helianthus). See you on Wednesday.

-Alex

 

Moyers, Brook T., and Loren H. Rieseberg. "Divergence in gene expression is uncoupled from divergence in coding sequence in a secondarily woody sunflower." Int J Plant Sci 174 (2013): 1079-1089.

 

Dynamics of R gene variation for Wednesday 9/24/2014

Last lab meeting we talked about variation, regulation, and sources of selection on R genes in tomato. Now we’d like to explore models for the evolution of host-pathogen interactions in plants. This week’s paper contrasts two hypotheses about the evolution of R genes, this time in Arabidopsis.

-Lucy

Stahl, E. A., G. Dwyer, R. Mauricio, M. Kreitman, and J. Bergelson. 1999. Dynamics of disease resistance polymorphism at the Rpm1 locus of Arabidopsis. Nature 400:667-671.


 

R gene diversity reading for Wednesday 9/17/14

 Last week we learned about how incompatibilities may arise due to epistasis between plant immune defense loci known as 'R genes.' We'd like to read more about where variation in R genes comes from, and get more background about what they do for plants. This week's paper looks at a specific R gene family in tomatoes, and makes some hypotheses about sources of selection acting on them.

Horger et al 2012. Balancing selection at the tomato RCR3 guardee gene family maintains variation in strength of pathogen defense. PLOS Genetics 8:e1002813.