Variation in nuclear DNA content in Malus species and cultivated apples

Tatiana C. Tatum, Svetlana Stepanovic, D. P. Biradar, A. Lane Rayburn, Schuyler S. Korban

Research output: Contribution to journalArticlepeer-review


The nuclear DNA content for a group of 40 Malus species and hybrids has been estimated using flow cytometry. Estimates of nuclear DNA content for this germplasm collection range from 1.45 pg for Malus fusca (diploid) to 2.57 pg for Malus ioensis (triploid). Among diploids, the nuclear (2C) DNA ranges from 1.45 pg for M. fusca to 1.68 pg for Malus transitoria. Among triploids, the nuclear (3C) DNA content ranges from 2.37 pg / 3C for Malus sikkimensis to 2.57 pg / 3C for M. ioensis. Given the complexity of the apple genome and its suggested allopolyploid origin, the results obtained in this study confirm earlier reports that polyploids can easily withstand the loss of a certain amount of DNA, and that there is a slight tendency towards diminished haploid nuclear DNA content with increased polyploidy.

Original languageEnglish (US)
Pages (from-to)924-930
Number of pages7
Issue number5
StatePublished - Oct 2005


  • Apple
  • DNA content
  • Flow cytometry
  • Malus
  • Ploidy

ASJC Scopus subject areas

  • Biotechnology
  • Molecular Biology
  • Genetics


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