Journal
BIOLOGIA PLANTARUM
Volume 44, Issue 4, Pages 489-495Publisher
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1023/A:1013761814407
Keywords
genetic variation; in vitro selection; Oryza sativa; salinity; tissue culture
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Two successive cycles of mature embryo-derived callus culture separated by one cycle of sexual reproduction of R-0 regenerated plants were performed using two rice (Oryza sativa L.) cultivars in order to gain information upon the nature of somaclonal variation in this species. Plants regenerated after one cycle of tissue culture exhibited higher variability and lower performances than those of initial cultivar. A second cycle performed using R-1 embryos as explants showed that the cellular component of salt resistance in terms of growth and regenerating abilities selected during the first cycle could be transmitted to the progenies. The extent and the nature of somaclonal variation depended on the identity of R-0 mother plant and culture conditions, somaclonal variation being strongly reduced in some families obtained from salt-treated calli.
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