Breaking point detection in PO1, PL3, CV2, CLRDV isolates and TYV alignment. (A) Detection of a breaking point at nt 443 of the alignment by GARD, using AIC as a criterion. The vertical axis displays the model-averaged probability of finding a break point at a given position in the alignment, represented in the horizontal axis. (B) Partial genome representation, indicating the break point and the phylogenies proposed by GARD for the segments before and after nt 443. The phylogenetic relationship between all other CLRDV isolates was collapsed and represented as a single branch designated "CLRDV isolates". Scale bar represents genetic distance. The TYV sequence used was deposited in the database under the accession number X13063.