Quote:
Originally Posted by druss
Given that I cant find any records of different ploidy levels in wild bananas Im assuming it occurs more commonly in domesicated hybrids.
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All wild bananas are diploid. There are different numbers of chromosomes between some species, but they are always diploid.
Quote:
Originally Posted by druss
By pollinating wild species with pollen from these groups, using yunnanensis as an example I could theoretically get AY or AaY from the diploid pollen and AY, Aay or AaaY from the triploids? I wouldnt think Id get any AYy or higher levels with the Yy.
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In theory that's true, but it would the same as if you were using M. yunnanensis pollen on a fertile AA or AAA female, as it is a normal wild species with good fertility, it is unlikely to be producing anything other than normal haploid (n) gametes. The 2n restitution gametes that can give double-doses of a genome are not normally occurring in wild species, they are the result of meiotic errors in domesticated clones. The most straightforward way to produce a 2n M. yunnanensis gamete would be create a synthetic tetraploid and it would give 2n gametes.
In reality, it's not really possible to say what you're going to get until you try, and then have some way to analyze the progeny, which is not a simple task. There is also the factor of recombination between genomes which can vary depending on the pairing affinity between the two species which so far is totally unknown, because there has (to my knowledge) been no breeding attempts with M. yunnanensis so far. So if you were to successfully incorporate a Y genome into an AA cultivar for example, it's likely it won't be so clean as being AY or AAY, but rather A(A/Y), or AA(A/Y).
Quote:
Originally Posted by druss
Once I had these id have to grow them out in isolation until they flowered then:
Check the female flowers werent bisexual, leave 1 bunch to fully flower to see if it was self fertile then grow it amongst others to check if it is partly fertile or sterile.
and finally on the last remove the male flowers to see if it has the p1, p2, p3 or any combo thereof and is hence parthenocarpic. If the fruit fully fill and develop I have a parthenocarpic hybrid of some fertility?
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You wouldn't really need to grow the progeny in isolation, you could just bag the female bud to prevent pollen coming from somewhere else. I would think it highly unlikely that a hybrid between M. yunnanensis and an edible variety would be self-pollinating (but if it were that would actually be potentially interesting to generate a new population from), but just in case, you could lift the bracts a day or two in advance of their natural opening and neuter the flowers by clipping the styles and thus preventing any potential accidental pollination. You would then see if the fruits are parthenocarpic or not and to what degree.