Transgressive segregant, interspecific hybrids between lilium ×formolongi and L. martagon with unique morphology

N. O. Anderson, A. Plattes, E. Opitz, A. Younis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Obtaining seed-propagated, colored L. ×formolongi hybrids with non-obligate vernalization (VER1, VER2) and colored flowers has involved hybridization with close and distantly related Lilium spp. The cross L. ×formolongi [00L-111-343 × 51-202-1] × L. martagon 'Cadense' (Martagon) in previous research (07L-14) produced 111 viable plants. Most hybrids flowered without vernalization, but all had white trumpet flowers despite close molecular marker alignment with 'Cadense'. However, 37 07L-14 seedlings were rosetted (nonflowering). The objective of this study was to analyze morphology of the 07L-14 rosetted progeny after vernalization to determine whether they possess colored flowers, exhibit hybrid breakdown, or transgressive segregants. A comparative but closer cross, L. regale × L. ×formolongi 'Augusta F 1' SD(5) (=06L-11) was also included. Among the 37 rosetted 07L-14 F 1s, six (16.2%) and one 06L-11 hybrid (1/48, 2.1%) had morphology deviating significantly from the parents and all other non-rosetted full-sibs. All of these hybrids had long, thin linear leaves, which were nearly whorled on the main stem axis, had significantly higher leaf counts and l:w ratios than either parent. The leaf phenotype and phyllotaxy resembles the Nicotiana sylvestris lam-1 and Oryza sativa narrow leaf1 (nal1) mutants. Three genotypes were apetalous with severely truncated floral organs (sterile). The other three 07L-14 and one 06L-11 flowered with functional female/male organs (low fertility). Notably, however, the number of sepals and petals equaled two each, making the total corolla count=4 (rather than 3+3=6 in monocots, the Liliaceae and Lilium); there were also n=4 anthers (instead of n=6). All such transgressive segregants had deep golden throat coloration with open-faced flowers similar to Oriental types, rather than the parents (trumpet or Turk's cap).

Original languageEnglish (US)
Title of host publicationII International Symposium on the Genus Lilium
EditorsA. Grassotti, G. Burchi
Pages181-188
Number of pages8
StatePublished - Jul 1 2011

Publication series

NameActa Horticulturae
Volume900
ISSN (Print)0567-7572

Keywords

  • Hybrid breakdown
  • Lam-1
  • Nal1
  • Rosetting
  • VER1
  • VER2
  • Vernalization

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