Association Analysis of Arsenic-Induced Straighthead in Rice (Oryza sativa L.) Based on the Selected Population with a Modified Model

Figure 2

The selection of the best fit model for association mapping of straighthead. Comparative plots of observed versus expected values and Bayesian information criterion (BIC) for six different association mapping models using 71 markers among 380 accessions. With an assumption that these markers are unlinked to the polymorphisms controlling straighthead, methods that appropriately control Type I error should show a uniform distribution of values and have low BIC scores. The PCA model was selected as the best fit model for association mapping of straighthead due to the lowest BIC score and a uniform distribution of values.