Abstract
This study was conducted to determine the effect of osmotic potential in a modified 85D12 medium on both callus induction and plant regeneration in the anther culture of two wheat genotypes, cv. Chris and cv. Pavon. Altering the medium osmotic potential by changing the carbohydrate source and concentration or by adding a non-metabolized osmoticum appeared to have the greatest potential for improving anther-derived green plant production. The medium osmotic potentials were varied (-0.67 to −2.30 MPa) by altering sucrose and PEG concentration. Both osmotica affected callus production, with −0.9 to −1.4 MPa media producing the most calluses. Callus production depended on genotype and osmoticum. Only PEG concentration affected green plant regeneration. The greatest number of green plants (11.5 plants per 100 anthers in cv. Chris) was obtained with 0.0125 M of PEG. This experiment suggested that a low level of PEG in the medium was beneficial for producing green plants from wheat anthers.
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