Nasrallah et al. 2004. Natural variation in expression of self-incompatibility

in Arabidopsis thaliana: Implications for the evolution of selfing. PNAS. 45: 1607016074


1.       What factors may favor the evolution of self-fertilization despite the general expectation that inbred individuals will have lower fitness?

2.       What is the gap in our knowledge that this study addresses? Why is this gap of interest?

3.       Describe a scenario where populations may evolve differences in the degree of self-compatibility. Based on this paper, do you think these conditions are rare in nature?