TABLE 2

Genomic rearrangements in the maize genome that occurred subsequent to the tetraploidization event

Event designationaLast event in tetraploid genome structureType of chromosomal rearrangementHomeologous group/segmentBreakpoint(s)/fusion point(s)Resulting chromosome arrangement
M INS-1MDEInsertionPM8 → PM3 bcd207-rz500/rz500-cdo464, bcd207-cdo99 M1 composite
M FS-1MDEFission at centromere(?)PM3isu62-cdo665/NFPPM3a-PM3b
M F-1MDEEnd-to-end fusionPM4-PM7NBP/isu109-TELOM2 composite
M F-2MDEEnd-to-end fusionPM2-PM5NBP/TELO(rz446)-TELO(isu60)M4 compound
M F-3MDEEnd-to-end fusionPM3b-PM2NBP/isu62b-TELOM5 composite
M F-4MDEEnd-to-end fusionPM3a-PM6NBP/cdo665-TELOM9 compound
M INS-2MDEInsertion (or fusion)PM5 → PM1TELO(cdo1338-CENT1S-rz995b), TELO(csu25-cdo394)M3 composite
M TR-1MDETranslocationR5L → PM6DISTAL TO cdo105(isu111)/isu111-rz144bM6 compound
M2 INV-1Composite M2InversionR11/12 isu127-isu54, cdo385-csu109/csu109-isu127, isu151-isu69 M2
M3 INV-1Composite M3InversionR11/12cdo344(12L)-csu25(11L)M3
M4 INV-1MDEInversionR11/12cdo127b(11S)-isu127(11S)/CENTROMEREM4
M4 INV-2Compound M4InversionR11/12uaz145(11C)-cdo127b(11S)M4
M8 INV-1MDEInversionR1Srz995a-CENTROMEREM8
M9 INV-1Compound M9InversionR3S, R6 cdo665b-cdo672b/cdo78-rz588 M9
  • a M, maize; R, rice; INS, insertion; INV, inversion; FS, fission; MDE, maize duplication event; TR, translocation; NBP, no breakpoint; NFP, no fusion point.