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Anthersisolated from tetraploid purple coneflowerplants were cultured in vitro. The highest callus induction rate was obtained when the medium was consisted of N6 basal elements, 4% sucrose, 0.5 mg?L?1 BA, and 0.10 mg?L?1 NAA. Various morphogenesis such as globular, heart-shape, torpedo-shapeand final state embryos as well asvarious texture calluses around were observed. Out of 110 plantlets regenerated, 104 were confirmed as diploid and the rest were as tetraploid. Plants of one diploid offspring strain presented aspecialcharacter in pot: unlike the original tetraploid plants, it grown tubular, bisexual ray florets. The results obtained in the present studies indicated that although the tetraploid purple coneflower plants produced only diploid microspores, the recovery of some useful mutants through in vitro anther cultures might be reasonably expected.

Anther Culture and Plant Regeneration of Tetraploid Purple Coneflower (Echinacea purpurea L.)