Gabe15

When breeding edible bananas, it is much more important to know the breeding behavior of the edible type as it will have sterility factors of some kind. Wild bananas are all very fertile, the sterility is only in the edible cultivars.

That being said, if you are attempting to cross into common edible bananas which are of the section Musa (base chromosome count n=11), then the best options are any wild species from sections Musa or Rhodochlamys which are all 2n=22. Some species such as M. basjoo and M. itinerans may be harder to cross, but it's possible. Although there have indeed been an extremely small number of successful crosses, generally Callimusa and Australimusa species cannot be used, but also there are very few easily available anyways. No cross should go untested, but if you had to choose it's best to stay within the same chromosome count groups.

If you were breeding with Fe'i bananas, which are of the section Australimusa (2n=20), then possibly almost any Callimusa or Australimusa could be considered, but again almost all of these plants are very rare to the hobbyist.

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Growing bananas in Colorado, Washington, Hawaii since 2004. Commercial banana farmer, 200+ varieties.