Fig. 3: Patterns of subgenome exchanges in the allotetraploid.
From: Incipient diploidization of the medicinal plant Perilla within 10,000 years
a Sequencing depth distribution between syntenic subgenomes indicated homeologous exchange in PF185. Coverage by PC02 indicated that the chr1 block was of AA-origin. In PF185, a 397-kb segment of chr2 (deletion, shown in green) was replaced by 281-kb homeologous sequences of chr1, resulting in a seemingly duplication of the chr1 segment (in red). Red boxes marked the corresponding HE intervals. b Reciprocal HE swapped 180 kb of chr7 with its syntenic chr19 interval. This balanced exchange was inherited by all tetraploid accessions. c Replacement of chr13 segments by non-homeologous chr15 sequences resulted in gene dosage imbalance (1:3) in PF175.
