Improved methods in Agrobacterium–mediated transformation of almond using positive (mannose/pmi) or negative (kanamycin resistance) selection-based protocols

Sunita Ramesh, Brent Kaiser, Tricia Franks, Graham Collins, Margaret Sedgley

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

A protocol for Agrobacterium-mediated transformation with either kanamycin or mannose selection was developed for leaf explants of the cultivar Prunus dulcis cv. Ne Plus Ultra. Regenerating shoots were selected on medium containing 15 μM kanamycin (negative selection), while in the positive selection strategy, shoots were selected on 2.5 g/l mannose supplemented with 15 g/l sucrose. Transformation efficiencies based on PCR analysis of individual putative transformed shoots from independent lines relative to the initial numbers of leaf explants tested were 5.6% for kanamycin/nptII and 6.8% for mannose/pmi selection, respectively. Southern blot analysis on six randomly chosen PCR-positive shoots confirmed the presence of the nptII transgene in each, and five randomly chosen lines identified to contain the pmi transgene by PCR showed positive hybridisation to a pmi DNA probe. The positive …
Original languageEnglish
Pages (from-to)821-828
Number of pages8
JournalPlant Cell Reports
Volume25
Issue number8
DOIs
Publication statusPublished - Aug 2006
Externally publishedYes

Keywords

  • Almond
  • Mannose
  • pmi
  • Prunus
  • Transformation

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