Identification of the four kernel types. These kernel types were identified and used to plant the four different dosage types of plants. The B-A chromosome TB-3La and chromosome 3 are illustrated. All other chromosomes are not shown, but still are present in their euploid amounts. TB-3La has a dominant marker, A1, to produce purple, and the complementary homologous segment on chromosome 3 has a recessive marker, a1, that does not produce purple.