Abstract
Haploid induction has potential application for maize breeding. This paper reports that maize haploid plants have been induced by in vitro culture of pollinated ovaries. From a total of 26,400 cultured ovaries, 24 haploid plants were obtained and two of them were doubled after colchicine treatment. The maximum frequency of gynogenesis was 0.17% at 19.5 h post-pollination (HPP). The results showed that HPP was an important factor affecting plant induction from ovaries. Regenerated diploid R0 plants were then subjected to genetic analysis using SSR molecular markers. One R0 plant, whose progeny revealed a high level of homogeneity for several agro-morphological traits, was homozygous at 20 loci tested, with 11 showing paternal and 9 maternal banding pattern. This demonstrates that it is feasible to induce maize haploid plants by in vitro culture of pollinated ovaries.
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Abbreviations
- CTAB:
-
cetyltrimethyl ammonium bromide
- DMSO:
-
dimethyl sulphoxide
- 2.4-D :
-
2,4-dichlorophenoxyacetic acid
- HPP:
-
the number of hours post pollination
- Kin:
-
kinetin
- NAA:
-
α-naphthaleneacetic acid
- SSR:
-
simple sequence repeats
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The authors are grateful to professor Ouyang Junwen for his critical reading of the manuscript.
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Tang, F., Tao, Y., Zhao, T. et al. In vitro production of haploid and doubled haploid plants from pollinated ovaries of maize (Zea mays). Plant Cell Tiss Organ Cult 84, 233–237 (2006). https://doi.org/10.1007/s11240-005-9017-7
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DOI: https://doi.org/10.1007/s11240-005-9017-7