Table 6 Mitotic chromosome numbers of F1 progenies from the crosses between cultivated sunflower and five other Helianthus species
Crosses2n = 342n = 492n = 51Abnormal Plants %Total Plants with 2n
 NMS HA 89-552/H. divaricatus30116.2532
 NMS HA 89-552/H. salicifolius50.005
 NMS HA 89-552/H. giganteus70.007
 NMS HA 89-552/H. grosseserratus220.0022
 NMS HA 89-552/H. hirsutus1620.00162
Total6411630.88228
 H. divaricatus/HA 41090.009
 H. salicifolius/HA 410260.0026
 H. hirsutus/HA 410510.0051
Total35510.0086
Overall9912140.64314
  • NMS, nuclear male-sterile.