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A protocol for repetitive somatic embryogenesis from mature peanut epicotyls

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 The effects of 11 different auxins and one cytokinin-like compound were tested at four concentrations for their ability to induce primary and repetitive somatic embryos from mature, dry peanut (Arachis hypogaea L.) epicotyls of genotype AT120. Treatment with picloram and centrophenoxine at 83.0 and 124.4 μm resulted in the greatest number of embryos per explant and the highest percentage of explants responding. In a follow-up experiment, picloram, centrophenoxine, and dicamba were tested at 83.0 and 124.4 μm on four peanut genotypes (AT120, 59-4144, GK7, and VC1). Picloram and centrophenoxine induced similar numbers of globular-stage and total embryos from each genotype, while dicamba was less effective. Similar results were observed with percentage of responding axes. Genotypes AT120 and VC1 yielded more clusters of repetitive embryos than GK7 and 59-4144. After 5 months, embryos derived from repetitive embryogenic cultures were converted into mature plants.

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Received: 8 February 1999 / Revision received: 9 June 1999 / Accepted: 30 June 1999

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Little, E., Magbanua, Z. & Parrott, W. A protocol for repetitive somatic embryogenesis from mature peanut epicotyls. Plant Cell Reports 19, 351–357 (2000).

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