Abstract
Production of transgenic pigeonpea is becoming increasingly important, but the methods currently employed in production and subsequent screening still requires improvement. Here, we describe Agrobacterium-mediated genetic transformation of pigeonpea with reporter uidA (gus) gene and selectable marker, neomycin phospho-transferase (nptII) gene. Histochemical assay demonstrate localization of gus activity in cells and transformed plants. Overall, a transformation frequency of 0.33% was achieved using the protocol. Grafting of in vitro-regenerated healthy shoots indicates higher survival percent (72.6%), when stock and scion are of the same variety. Seeds harvested from primary transgenic plants can be screened based on lateral root inhibition strategy. Approximately 87% of the screened T1 plants were found to be PCR positive. In conclusion, in vitro grafting of transgenic pigeonpea shoots leads to better plant establishment and screening based on lateral root inhibition leads to quick identification of positive segregants.
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Das, A., Kumar, M., Singh, A.K. et al. Genetic transformation of pigeonpea (Cajanus cajan L.) and screening transgenic progenies based on lateral root inhibition. J. Crop Sci. Biotechnol. 19, 295–302 (2016). https://doi.org/10.1007/s12892-016-0045-0
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DOI: https://doi.org/10.1007/s12892-016-0045-0