Quote:
Originally Posted by Undergrounder
Perhaps that broad distinction is based on the fact that species x species crosses almost always tend to be clean ploidy, whereas hybrids in general are more likely to be aneuploid or 3n. While whites, pinks, spots, stripes and harlequins are generally free breeders, multiflorals, miniatures, yellows, reds, greens, blues and novelties are often quite difficult.
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That's a very interesting thing, has I said I canīt by my self say to much in phalaenopsis case, but in Cattleya species (and Venezuela is very strong in Cattleya species melioration), many of the best plants for breeding are possible 2(x)n, and almost all formas (alba, semialba, concolor, coerulea) are possible aneuploids.
Un terms of comparing Cattleya species with complex ''cattleya'' hybrids, the only two things not shared that can explain the less productivity are species incompatibility and genetic bottlenecks, but the last thing I believe is becoming rapidly part of shared concomitants. I still have to ''confirm'' if seed productivity among Cattleya species is decreasing or not.
well I had to quote that I am talking ''statistically'' (meaning comparing two things) and never considering
''less seed productivity'' = very difficut to breed but
''less seed productivity'' = more difficut to breed than... that means both can breed freely
Quote:
Originally Posted by Undergrounder
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Excellent reading thank you very much undergrounder you are very kind indeed. I wonder very much how to interpret the percentages involved for example rimestadiana is considered right know part of amabilis, amabilis ssp formosana is conidered as a ssp of aphrodite or even its own sp formosana. The other thing is with Sanderiana, the last phylogenetic paper I read told that wasenīt evidence enough to separate sanderiana I think it was from aphrotide (or was amabilis),
http://apps.kew.org/ says that Phal. sanderiana is still a valid name, but I think in the near future the taxon would be merged.
God, this is a mess. hehehehehe