Annals of Botany 83: 725-728, 1999
© 1999 Annals of Botany Company
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A Lack of Nuclear DNA Content Variability Among Wheat Near Isolines Differing in Aluminium Response
Department of Crop Sciences, 320 ERML, 1201 W. Gregory, University of Illinois, Urbana, IL, 61801, USA Illinois Statistics Office, 119 Illini Hall, University of Illinois, Urbana, IL, 61801, USA USDA-ARS-Appalachian Soil and Water Conserv. Res. Lab., Beaver, WV, 25813, USA
October 13, 1998 ; January 27, 1999
ABSTRACT
Nucleotypic variation has been speculated to play a role in the adaptation of crop species to environmental stress. The objective of this study was to determine if nuclear DNA content variability was associated with aluminium (Al) tolerance in wheat. Six wheat (Triticum aestivumL.) near isolines (differing in Al response), two recurrent parents (Al sensitive), and one donor parent (Al tolerant) were all analysed for nuclear DNA content using flow cytometry. A 1.7% variation in nuclear DNA content was observed among the nine wheat lines. No association between Al response and nuclear DNA content was observed. All of the wheat near isolines had a nuclear DNA content similar to their recurrent parent. The wheat genome appears to be stable with no unusual inheritance of nuclear DNA content observed. Flow cytometric analysis proved to be sensitive enough to detect nuclear DNA content variability at the level of 0.5% variation among wheat lines.Copyright 1999 Annals of Botany Company
Genome size,Triticum,breeding, near isogenic.
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