alexa Comparison of developmental stages of inflorescence for high frequency plant regeneration in Triticum aestivum L. and T. durum Desf.
Genetics & Molecular Biology

Genetics & Molecular Biology

Cloning & Transgenesis

Author(s): Sharma VK, Rao A, Varshney A, Kothari SL

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Abstract Whole immature inflorescences at 4 different developmental stages (0.5, 1.0, 1.5, 2.0 cm in size) of different genotypes of Triticum aestivum and T. durum were cultured to see the morphogenetic responses on Murashige and Skoog's (MS) medium supplemented with 2,4-dichlorophenoxyacetic acid (2,4-D) (2.5 mg/l). Very young inflorescences 0.5 and 1.0cm long formed embryogenic callus from their entire surface while 1.5 and 2.0 cm long inflorescences formed embryogenic callus from the basal spikelets and rachis only. This embryogenic callus was maintained by regular subcultures on MS medium with 2,4-D (2.5 mg/l) for more than a year. Plantlets were regenerated by transferring the embryogenic callus on hormone-free MS medium. Inflorescences (0.5 and 1.0 cm long) responded best in forming callus as well as plantlets at a very high frequency. Variation in response was observed amongst the genotypes but the qualitative response of formation of embryogenic callus and later regeneration of plantlets was observed from all the genotypes. Immature young inflorescence explants could provide a suitable material for particle gun mediated genetic transformation in wheat. This article was published in Plant Cell Rep and referenced in Cloning & Transgenesis

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