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Efficient protocol for in vitro production of androgenic haploids of Phlox drummondii

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Abstract

Production of haploid plants has been restricted to only a few ornamental species. In this paper an efficient anther culture protocol has been devised for production of haploid plants of Phlox drummondii, a garden ornamental. Anthers with microspores at early- to late-uninucleate stages were inoculated on MS (Murashige and Skoog, Physiol Plant 15:473–479, 1962) basal medium containing 9% sucrose, 10 μM 2,4-D + 5 μM BA in the dark for callus induction. The callus (~2 mm) was transferred to MS medium containing 3% sucrose + 10 μM BA + 5 μM NAA under a 16 h photoperiod for multiplication. Anther-derived callus showed the greatest shoot differentiation (60% with greater than 3 shoots per culture) at 13 weeks after culture initiation when maintained on MS medium supplemented with 3% sucrose and cytokinin (7.5 μM BA). At 68 weeks, only 4.6% of cultures differentiated with less than one shoot per callus. Anther-derived shoots rooted readily on MS medium containing 7.5 μM IAA. Of 60 plants that regenerated from anther callus, 50% were haploid, 30% diploid, and 20% aneuploid. Developed protocol could be useful for the haploid induction of outcrossing ornamental plants for production of their homozygous double haploids.

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Abbreviations

BA:

6-Benzyladenine

2,4-D:

2,4-Dichlorophenoxyacetic acid

IAA:

Indole-3-acetic acid

Kn:

Kinetin

NAA:

α-Naphthalene acetic acid

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Acknowledgments

We thank the Head, Department of Botany, University of Delhi for providing facilities to conduct this study.

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Correspondence to Maharaj Krishen Razdan.

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Razdan, A., Razdan, M.K., Rajam, M.V. et al. Efficient protocol for in vitro production of androgenic haploids of Phlox drummondii . Plant Cell Tiss Organ Cult 95, 245–250 (2008). https://doi.org/10.1007/s11240-008-9431-8

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  • DOI: https://doi.org/10.1007/s11240-008-9431-8

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