This area is about the relationship between flower structure and pollination efficiency. It also includes reproductive costs and success. These studies are presented in chronological order with the most recent works listed first.
Records from a collection of hybridizers around the world are also available in this area and are in chronological order.
2023 — For many years, the ADS had a “Round Robin” for hybridizers that circulated by snail mail. ADS is now using DaffLibrary for the postings.
2023seeds (version 1) Michael Berrigan
2023seeds (version 1) Michael Berrigan (an Excel file of the above PDF file.
2011 to Present
“Breeding Miniatures,” by Graham and Helen Fleming, Keira Bulbs, ADS Fall Forum, October 25, 2020
“The fertility of NNNX daffodil varieties,” by Theo Sanders, Germany, January, 2020
“Chromosome doubling of Narcissus varieties and species,” by Theo Sanders, Germany, December-2019
“Some Crosses with Diploid Tazettas and their Fertility,” Theo Sanders, Daffnet, June 2016
Theo Sanders’ website with his findings about daffodil hybridizing, pollen and chromosomes
“Narcissus cyclamineus crosses and their fertility,” Theo Sanders, February 2016
Pollen Volume Chromosome Content 3, Theo Sanders, 2014
“Crosses of Standard Daffodils with Species,” Theo Sanders; Aug 2012, photos
“Crosses of Standard Daffodils with Species,” Theo Sanders; Aug 2012, Notes
Hybridizing Glossary, August 2011
1951 – 2010
“Pollens Under Microscope“, by Shen Rui, a link to the Department of Chemical Engineering, University of Rochester, May 2006.
Brian Duncan Hybridising Records, 1964 – 2002
Bill Gould hybridizing records 1966 to 1971, and garden notes; Handwritten, so not searchable.
Helen Link Hybridizing Records, 1963 – 1971
Helen Link Hybridizing Records, 1972 – 1979
Helen Link Hybridizing Records, 1980 – 1990
Helen Link Hybridizing Records, 1991 – 1996 plus notes
John Lea Hybridizing Records, 1948 – 1966
John Lea Hybridizing Records, 1967 – 1984
Looking at Pollen, Theo Sanders, The Daffodil Journal, Dec 2009
Hybridizers’ breakfast, ADS Convention, Columbus, Ohio, 1987
Hybridizers’ breakfast, ADS Convention, Memphis, Tennessee, 1986
Hybridizers’ breakfast, ADS Convention, King of Prussia, Pennsylvania, 1985
“From a Letter to David Willis,” Brian Duncan, [on breeding aims] The Daffodil Journal, June 1981
“Daffodil Propagation,” Peggy Macneale, Civic Garden Center Bulletin, May-June, 1978
“The Breeding of Pink Daffodils in Tasmania,” W. Jackson, RHS Yearbook 1959
“Some Favourites Amongst Daffodils I Have Raised,” Guy L. Wilson; Herbertia, Vol. 9, No. 1, 1953
A collection of Roberta C. Watrous’ Hybridizing Records, 1944 to 1984
J. M. deNavarro’s Hybridizing Records, 1944 to 1972
1950 and Earlier
Richardson Hybridizing Records, 1928 – 1969
Oregon Bulb Farm Hybridizing Records from the 1920s through the 1960s
“Notes on Daffodil Breeding,” Guy L. Wilson, Herbertia, Vol. 13, 1946
“Commercial Breeding of Daffodils,” Frank Reinelt; Herbertia, Vol. 13, 1946
“Narcissus Breeding by an Amateur,” W.R. Ballard, Herbertia, Vol. 13, 1946
“Experiences in Breeding Narcissus,” J.S. Cooley, Herbertia, Vol. 13, 1946
“Steps in Producing Hybrid Narcissus,” Kenyon Reynolds, Herbertia 1944
“Bulbs from Seed,” David Griffiths, USDA Circular 311, June 1934
The Latest Hobby: How to Raise Daffodils from Seed; Cartwright & Goodwin, 1908