Amphidiploid roses can also be created deliberately from diploid-diploid hybrids by using colchicine spray on the growing tips of the plants.
2.
Amphidiploid roses including " Rosa kordesii " have been used to some degree in breeding programs in combination with naturally occurring tetraploid roses.
3.
In the latter case, these are known as allopolyploids ( or amphidiploids, which are allopolyploids that behave as if they were normal diploids ).
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