I have some new results for pollen volumes and chromosome contents of daffodils as a pdf-document. The results are integrated into my paper from February 2012. Perhaps some hybridizers may be interested. Pollen Volume and Chromosome Content of Daffodils; Possibilities…
Category: Pollination
This is about the relationship between flower structure and pollination efficiency. It also includes reproductive costs and success.
Looking at Pollen
Harold, The two bigger pollen grains of your photo could be viable and perhaps unreduced or unreduced and doubled. The method of causing the pollen to sprout, and examining it under a microscope has been described by Lawrence Trevanion in “A Look at…
Pollen Volume and Chromosome Content of Daffodils; Possibilities for hybridizing
Pollen Volume and Chromosome Content of Daffodils; Possibilities for hybridizing.pdf The text enclosed is no real detective story about daffodils and in any case a little more complicated. It is especially for other hybridizers and hybridizers to come. I composed…
Little bulbs of N. henriquesii
Some scales with little bulbs of N. henriquesii. They were treated with Oryzalin for chromosome doubling and stored 12 weeks at 20 degrees C in a heat box. Theo
NNNX Crosses 2
The plants produce little pollen, big pollen, or both types. An example for the last case is shown in the picture. Theo
NNNX Crosses 1
The pictures show new seedlings of this spring from the following crosses: Symptom x Matador, Hillstar x Amadeus and Oregon Cedar x Emerald Sea. These crosses have 3 chromosome sets of standard daffodils (NNN) and 1 chromosome set of N. tazetta, N. jonquilla or N.…