Seedlings 4

 

The second picture is an older seedling of Honeybird x N. hedraeanthus (NHH). This year I found out, that it is fertile. It has unreduced pollen and gives with N. hedraeanthus (HH) allotetraploid daffodils of the type NNHH which are fertile. The cross Ufo x N. cantabricus from Spain (NNC) which flowered this year for the first time is not a daffodil for shows but fertile. Two thirds of the pollen are unreduced with NNC, one third is NC. If the pollen NNC meets an egg cell of N. cantabricus from Spain they form fertile plants with NNCC. The creating of NNHH- and NNCC- types would be a great progress, because nowadays only few  fertile hybrids of NNVV, NNJJ, NNTT and NNTrTr exist.Tr is one chromosome set of N. triandrus.
The same goal can be achieved by chromosome doubling of species and then crossing these with standard daffodils. But Harold Koopowitz and Bill Welch only were successful in chromosome doublling of daffodils, as far as I know.
Theo