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Is a cross between D. Capensis and D. Filiformis x tracyi possible?

curtisconners

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I won a D. Filiformis x tracyi at the nasc auction and I already own 3 capensis "giant" and I was wondering if a cross between the two is possible. I doubt it is, but I thought that I would ask. If it is possible, how would I care for it? Thanks in advance.
 
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I've attempted a similar cross with filiformis "FL All Red" but have not had success thus far. I ended up with a lot of capensis instead of hybrids, so it may have just been a contamination thing, and I will try again if I get the chance, so we'll see.
 
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The plants probably aren't closely related enough for it to work, but it's always worth a try. Someone more informed than I would have to comment on whether the two plants' chromosome counts are compatible.
 

curtisconners

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I actually did a little research. If I interpreted the charts correctly, d. capensis has 20 chromosomes and d. filiformis has 40. I still want to try though.
 
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I think you got that backwards. D. capensis is tetraploid (4 copies of each chromosome,) 2n=40 and D. filiformis (as well as tracyi) is diploid (2 copies of each chromosome,) 2n=20. In any case, I believe by chromosome count all NA, SA, and ZA species are compatible so it is just a matter of if they are genetically compatible.

Genetics is complicated. This article is incredibly long: International Carnivorous Plant Society - Drosera chromosomes
 
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Supposedly it should be possible, since capensis can cross with rotundifolia which is not terribly distant from filiformis, but genetics are weird: capensis can cross with aliciae, and aliciae with species like natalensis, but natalensis and capensis are incompatible; may be a similar situation.
I also know capensis can cross with things like sp. Lantau Island, and Lantau can cross with filiformis, but the further jump still unknown.
 
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