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  • Title: Barley (Hordeum vulgare L.) transformation using embryogenic pollen cultures.
    Author: Otto I, Müller A, Kumlehn J.
    Journal: Methods Mol Biol; 2015; 1223():85-99. PubMed ID: 25300833.
    Abstract:
    The temperate cereal barley is grown as a source of food, feed, and malt. The development of a broad range of genetic resources and associated technologies in this species has helped to establish barley as the prime model for the other Triticeae cereals. The specific advantage of the transformation method presented here is that transgene homozygosity is attained in the same generation as the transgenic event occurred through the coupling of haploid technology with Agrobacterium-mediated transformation. Pollen is haploid and, following transformation, can be induced to regenerate into haploid plantlets, which can subsequently subjected to colchicine treatment to obtain diploid, genetically fixed plants. The routine application of the method based on the winter-type barley cultivar 'Igri' over a period of over 10 years has achieved an average yield of about two transgenic plants per donor spike. The whole procedure from pollen isolation to non-segregating transgenic, mature grain takes less than 12 months.
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