ISHS


Acta
Horticulturae
Home


PubHort
Home


Login
Logout
Status


Help

ISHS Home

ISHS Contact

Search
 
ISHS Acta Horticulturae 836: XXIII International Eucarpia Symposium, Section Ornamentals: Colourful Breeding and Genetics

DEVELOPMENT OF COLORED, NON-VERNALIZATION-REQUIRING SEED PROPAGATED LILIES

Authors:   N.O. Anderson, A. Younis, E. Optiz
Keywords:   interspecific hybridization, hybrid breakdown, VER1, VER2, self incompatibility, self compatibility, ISSRs
DOI:   10.17660/ActaHortic.2009.836.27
Abstract:
Recent discovery of seed-propagated Lilium × formolongi hybrids that flower continuously in <1 yr without vernalization (200-240d after sowing due to ≥1 dominant VER1, VER2 alleles) with frost-tolerance, day neutrality, and winter hardiness is an unprecedented combination in Lilium. Our objective to obtain colored L. × formolongi was to use Class I lilies that initiate flower buds prior to a cold treatment as parents, e.g. Lilium martagon. Reciprocal interspecific crosses between fertile parents (1-L. × formolongi, 7-colored L. martagon) were made in both directions to generate segregating hybrid (F1) and inbred (F2) progenies. A total of 8,826 F1 seeds or embryos were generated. Embryo rescue was employed when L. martagon was the female, although viable embryos never germinated after ~1 yr in culture. Mean germination ranged from 0-1.02% for in situ ripened seed. Hybridity for one successful cross (07L-14; L. × formolongi [00L-111-343×51-202-1] × L. martagon ‘Cadense’) was analyzed using morphological (flowering, leaf and internode number, leaf length:width ratios, compatibility, no. flower stalks and flowers, rosetting) and molecular markers (ISSR primers). Twenty-two 07L-14 genotypes were genetically similar to the female parent whereas 86 aligned closely with the male (‘Cadense’). The number of shoots/plant was the only quantitative trait co-segregating with ISSRs. Flowering traits were intermediate to, but significantly different than, either parent. A majority of the plant height and inflorescence lengths were significantly greater than the parents. Two F1s had slight flower coloration in the petals and tepals; one hybrid had an open-faced rather than trumpet flower (similar to an Oriental type).

Download Adobe Acrobat Reader (free software to read PDF files)

836_26     836     836_28

Websites www.pubhort.org/actahort/      www.actahort.org       www.pubhort.org       www.ishs.org       Hosted by KU Leuven      ©ISHS