Abstract
A system for producing haploid plants from anther cultures was developed for the Asiatic hybrid lily ‘Connecticut King’. Anthers containing microspores at the mid- to late-uninucleate stages were cultured on MS media supplemented with various plant growth regulators. Microspores containing 3 or 4 vegetative-like nuclei were observed 2 to 3 weeks later, and yellowish nodular calluses appeared within dehisced anthers 2 to 3 months after culture. Picloram was superior to 2,4-d for inducing nodular calluses. Anthers from greenhouse-grown plants required higher concentrations of both picloram and cytokinins than those from field-grown plants and most frequently produced nodular calluses (17.6%) on MS medium containing 2 mg 1−1 picloram and 2 mg 1−1 zeatin. The nodular calluses regenerated many bulblets following transfer to MS medium supplemented with 0.1 or 0.5 mg 1−1 picloram and 0.01 mg 1−1 BA, and the bulblets developed into plantlets (bulblets with scaly leaves and roots) after transfer to MS medium containing 0.1 mg 1−1 NAA. Chromosome counts of root-tip cells of 11 plantlets revealed that five were haploids (2n = 12), two diploids (2n = 24), and four mixoploid. This result suggests that at least some plantlets were of gametophytic origin.
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Abbreviations
- BA:
-
benzyladenine
- 2,4-d :
-
2,4-dichlorophenoxyacetic acid
- DAPI:
-
4′,6-diamidino-2-phenylindole
- MS:
-
Murashige and Skoog (1962)
- NAA:
-
α-naphthaleneacetic acid
- picloram:
-
4-amino-3,5,6-trichloropicolinic acid
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Han, DS., Niimi, Y. & Nakano, M. Regeneration of haploid plants from anther cultures of the Asiatic hybrid lily ‘Connecticut King’. Plant Cell Tiss Organ Cult 47, 153–158 (1997). https://doi.org/10.1007/BF02318951
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DOI: https://doi.org/10.1007/BF02318951