RE: Hyb-sweerti,
Some second thoughts.
The 38 chromosome count would suggest second generation and not first generation from 48 chomosome paarent. The first generation of triploid would have 36 chromosomes. Sterlie or reduced fertility and pollen much reduced fertility. During meitosis ( forming of reproductive gametes) there are formed diploid and tetraploid gamets. It is during this division that odd (unpaired chromosomes) such as from the extra set of 12 , that some extra (supernumery)chromosomes can be included in the gamete ( See Kenneth Kidd in BAIS # 190 & 193 or in WOI). Usually the offspring are either tetraploid or diploid , some with supernumery chromosomes. In the odd case there would be another odd pairing such as tetraploid pollen on diploid egg. This is the most likely scenerio as diploid on tetraploid seldom if ever works.
Following this through and speculating on aphylla as being the tetraploid parent we would then have Swerti as 3/4 ahylla nucleus genes with cytoplasm of the diploid parent. This based on alphylla being pollen parent in both cases. Thus foliage would likely more resemble the diploid species.
Following this up more, if this indeed is the case , the best bet for viable seeds would be to place alphylla pollen on Swerti flowers. In any case it would likely be a lost cause to try to use the pollen.
Whew, what a ride.
Chuck chapman
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