Abstract
A procedure is described for the routine establishment and multiplication of red clover, Trifolium pratense L., shoot tips which should be applicable to a wide genotypic background. The addition of CO2 to the culture vial or use of polypropylene closures enhanced shoot multiplication at high levels of benzyladenine (BA). Horizontal orientation of crown buds resulted in more efficient multiplication. Culture of nodes from flowering stems was unsuccessful. The cytokinin BA was most effective for shoot multiplication at 2.0 mg/l with maximum shoot production by four weeks. A comparison of several genotypic sources revealed a 10-fold range in response to the multiplication medium with no differences observed among agronomic type or ploidy level. An additional study revealed that multiplication ability of a genotype can be determined after the second subculture since multiplication ability does not change during repeated subculture.
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