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DNA variations in regenerated plants of pea (Pisum sativum L.)

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The aim of this study was to determine whether DNA variations could be detected in regenerated pea plants. Two different genotypes were analyzed by cytogenetic and molecular techniques: the “Dolce Provenza” cultivar and the “5075” experimental line. “Dolce Provenza” regenerated plants showed a reduction in DNA content, particularly at the level of unique sequences and ribosomal genes. Moreover, regeneration was associated with an increase in DNA methylation of both internal and external cytosines of the CCG sequence. On the other hand, the DNA content of the “5075” line remained stable after regeneration. DNA reduction was found only in “5075” plants regenerated from callus cultures maintained for long incubation periods (about a year). The DNA variations observed are discussed both in relation to the genotype source and the role of tissue-culture stress.

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Communicated by F. Mechelke

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Cecchini, E., Natali, L., Cavallini, A. et al. DNA variations in regenerated plants of pea (Pisum sativum L.). Theoret. Appl. Genetics 84, 874–879 (1992). https://doi.org/10.1007/BF00227399

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  • DOI: https://doi.org/10.1007/BF00227399

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