Abstract
Morphogenic calli were obtained efficiently from ab initio cultures of isolated microspores in eggplant. Initial culture of freshly isolated microspores in sucrose-free medium at high temperature (35°C) for 3 d was a prerequisite for callus induction. The microspores were re-cultured in modified NLN medium containing 2% sucrose and phytohormones (NAA 0.5 mg l−1, BA 0.5 mg l−1) in the dark. After 4 weeks of re-culture, small calli derived from microspores were transferred to MS medium containing 4 mg l−1 zeatin and 0.2 mg l−1 IAA for shoot regeneration. The ploidy of 12 randomly selected regenerants was assessed by chromosome counts in root tips. Only one of the regenerants was haploid, 7 were diploid, 3 were triploid and one was tetraploid. The diploids set seeds after self-pollination and showed no segregation for morphological traits in the progeny, suggesting that they were spontaneously doubled haploids.
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Abbreviations
- BA:
-
6-benzylaminopurine
- NAA:
-
1-naphthaleneacetic acid
- IAA:
-
indole-3-acetic acid
- DAPI:
-
4′,6-diamidino-2-phenylindole dihydrochloride
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Communicated by G. C. Phillips
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Miyoshi, K. Callus induction and plantlet formation through culture of isolated microspores of eggplant (Solanum melongena L.). Plant Cell Reports 15, 391–395 (1996). https://doi.org/10.1007/BF00232061
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DOI: https://doi.org/10.1007/BF00232061