Showing posts with label meiotic drive. Show all posts
Showing posts with label meiotic drive. Show all posts

Friday, February 23, 2018

Female meiotic drive, Mimulus

Finseth

CenH3

female gametogensis is asymmetric, only one egg but 3 poly bodies. So, there is advantage for genes to be meiotic drivers.

Malik & Hensoff 2001, centromeric drive model. Cost associated with meiotic drive.

Mimulus best case of centromere meiotic drive. Fishman et al 2005, 2008. 
strong hetero-specific drive. M nasutus vs M. guttatus

weak conspecific drive in M. guttatus

Do CenH3 and centromer co-evolve?
Most abundant repeats in WG tend to be centromeric repeats

Finseth found many codons with >2 omega.
Finseth look for GWS in F2 plants, 122 individuals, 1247 markers (14 linkage groups, 14 chromosomes)

Look for genetic suppresor of CenH3 meiotic drive using genewise linkage disequilibrum (r^2),
D in nonrecombining block, suggesting recent selective sweep (Q: how is genetic surfing excluded? )

CenH3A and CenH3B

plan for population

Mimulus does not grow in TN?

Silene in TN
dioecious species
gynodiecious species
hermaphrodites

Reference
https://en.wikipedia.org/wiki/Mimulus

https://www.nature.com/articles/s41598-017-17932-8