Adjacent I gametes are both duplicate and deficient. They are normally inviable due to their deficiency. However, the addition of an appropriate BA chromosome will cover the deficiency and rescue the gamete along with its duplication. Cross the selected plants as female to a wx wx tester. From the selected ears, germinate seeds and select Wx Wx plants.
Self pollinate to establish a homozygous stock.
The seeds produced were tested to confirm presence of the duplication. The first test involved germinating five kernels from each ear and checking chromosome numbers in the roots. Results are currently available for 6799-1. All five plants derived from ear 6799-1 contained 22 chromosomes. The extra two chromosomes were shown to be B9's, as expected.