Polyploids
Many important crop species are polyploid: cotton, wheat, banana, sugarcane, potato
There are two classes of polyploid:
autopolyploids have only one parent, but two or more times the number of chromosomes; examples are potato and red clover
allopolyploids have more than one parent and contain the full set of chromosomes from each of their parents; examples are cotton and bread wheat
triploids have three sets of chromosomes.
An AAA type is an autotriploid, AAB or ABC are allotriploids
tetraploids have four sets of chromosomes.
AAAA is an autotetraploid, AABB is an allotetraploid, etc.