Selecting dwarf apple (Malus x domestica Borkh.) trees in vitro: Multiple cytokinin tolerance expressed among three strains of 'McIntosh' that differ in their growth habit under field conditions

M. Sarwar, R. M. Skirvin, M. Kushad, M. A. Norton

Research output: Contribution to journalArticlepeer-review

Abstract

Microcuttings of three strains of 'McIntosh' apple that varied in their growth habit under field conditions were tested for their tolerance to three cytokinins (BA, kinetin, and 2iP) and one cytokinin-like compound (TDZ) in vitro. The three strains were 'McIntosh' (standard), 'Macspur' (intermediate) and 'Wijcik' (dwarf). For each cytokinin 'Wijcik' was more tolerant of high cytokinin levels than either 'Macspur', which showed an intermediate tolerance, or 'McIntosh' which did not tolerate (died) high levels of cytokinins. These results show that 'Wijcik' exhibits multiple cytokinin tolerance in vitro. The relationship between growth habit and BA tolerance has been reported earlier. The present study demonstrates that cytokinins can be used to differentiate among growth types in apple.

Original languageEnglish (US)
Pages (from-to)71-76
Number of pages6
JournalPlant Cell, Tissue and Organ Culture
Volume54
Issue number2
DOIs
StatePublished - 1998

Keywords

  • Dwarf cultivars
  • Dwarfism
  • Selection
  • Tissue culture
  • Tolerance

ASJC Scopus subject areas

  • Horticulture

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