Abstract
Abstract The influence of donor plant growth environment, microspore development stage, culture media and incubation conditions on microspore embryogenesis was studied in three Indian B. juncea varieties. The donor plants were grown under varying environments: field conditions, controlled conditions, or a combination of the two. The correlation analysis between the bud size and microspore development stage revealed that the bud size is an accurate marker for donor plants grown under controlled conditions, however, the same does not hold true for the field-grown plants. The buds containing late uninucleate microspores collected from plants grown under normal field conditions up to bolting stage and then transferred to controlled environment were observed to be most responsive with genotypic variability ranging from 10 to 35 embryos per Petri dish, irrespective of the other factors. NLN medium containing 13% sucrose was found to be most suitable for induction of embryogenesis. The fortification of this medi...
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