Chromosome Variation in Dividing Protoplasts and Cell Suspensions of Wheat
Abstract
The cytology of bread wheat (Triticum aestivum) suspension lines, recycled lines (selected for high division frequency) and their dividing protoplasts, have been examined. Extensive numerical and structural chromosome variation was present in all the lines. The most frequently observed chromosome numbers were around 2n=32, indicating that considerable chromosome loss from the normal wheat complement (2n=6x=42) had occurred during selection of the lines. Chromosome aberrations also indicated loss of chromosome arms and chromosome segments. The implications of this variation for studies on transformation and for the potential regeneration of whole plants from protoplasts of bread wheat are discussed.
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In bread wheat, Karp et al. observed that chromosome number increased when grown in high concentrations of 2,4-D.
“In bread wheat, Karp et al. observed that its chromosome number increased when grown in high concentrations of 2,4-D (2,4-dichlorophenoxyacetic acid) [47].”
From Somaclonal Variation and Clonal Fidelity in Commercial Micropropagation: Challenges and Perspectives (2025) · cites this paper as [47]
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References 24 · Cited by 62
- Authors
- Karp, A., Wu, Q. S., Steele, S. H., & Jones, M. G. K.
- Affiliations
- Rothamsted Research (GB)
- Venue
- Theoretical and Applied Genetics
- Published
- 1987-05
- Volume
- 74
- Issue
- 1
- Pages
- 140-146
- ISSN
- 0040-5752 (ISSN-L)
- 1432-2242
- OpenAlex
- W2006219658
- Cited by
- 62
- References
- 24
- Citations by year
- 2025: 1 · 2020: 1 · 2018: 1 · 2016: 2 · 2014: 1 · 2012: 2
- FWCI
- 6.68
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Theoretical and Applied Genetics (publishedVersion)
- PubMed (publishedVersion)
- Murdoch University Research Portal (submittedVersion)
- Rothamsted Repository (Rothamsted Repository) (submittedVersion)
- Funders
- Biotechnology and Biological Sciences Research Council (BB/G016216/1)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Wheat and Barley Genetics and Pathology
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant tissue culture and regeneration
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
- Keywords
- chromosomal variation, cell suspension culture, chromosome loss, chromosomal abnormalities, plant transformation, protoplast regeneration
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