not exactly genetics, but . . .

we do use phylogenies (!) to examine:

1) lemur ecology and evolution

http://www.plosone.org/article/info:doi/10.1371/journal.pone.0011073

2) mammal longevity

http://rsbl.royalsocietypublishing.org/content/early/2010/05/08/rsbl.2010.0348.abstract?cited-by=yes&legid=roybiolett;rsbl.2010.0348v1