Day: November 24, 2018

The fertility of seedlings from N. cavanillesii x Emerald Sea, N. cavanillesii x (Ballygowan x N. viridiflorus), and N. x xanthochlorus x (Ballygowan x N. viridiflorus)

   Seedlings from the first two crosses have two chromosome sets (CC) from N. cavanillesii, one (V) from N. viridiflorus, and one (N) from a tetraploid standard daffodil. Seedlings of the third cross have two chromosome sets from N. viridiflorus,…