Articles
TRANSGRESSIVE SEGREGANT, INTERSPECIFIC HYBRIDS BETWEEN LILIUM ×FORMOLONGI AND L. MARTAGON WITH UNIQUE MORPHOLOGY
Article number
900_22
Pages
181 – 187
Language
English
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 F1 SD(5) (=06L-11) was also included.
Among the 37 rosetted 07L-14 F1s, 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 Turks cap).
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 F1 SD(5) (=06L-11) was also included.
Among the 37 rosetted 07L-14 F1s, 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 Turks cap).
Publication
Authors
N.O. Anderson, A. Plattes, E. Opitz, A. Younis
Keywords
hybrid breakdown, lam-1, nal1, VER1, VER2, rosetting, vernalization
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