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- W2105801940 abstract "Genomic alteration is a common phenomenon associated with plant tissue culture, which often encompasses genetic changes and epigenetic modifications (e.g. cytosine methylation). Here, we studied genomic alteration in maize by assessing calli and regenerated plants derived from three inbred lines (M17, J7 and JC) and two pairs of reciprocal F1 hybrids (pair I: M17/J7 and J7/M17 and pair II: M17/JC and JC/M17). By employing two molecular markers, the amplified fragment length polymorphism and methylation-sensitive amplified polymorphism, we found that both types of genomic alterations occurred in calli and regenerated plants of all the studied maize inbred lines and F1 hybrids, but the extent and pattern of changes varied substantially across the genotypes. Among the three inbred lines, M17 showed markedly higher frequencies of both genetic (from 2.1% to 3.8%) and methylation alterations (from 6.5% to 9.9%, by adding up the various patterns) than the other two lines which showed similar frequencies for both types of alterations (genetic: 0.5–1.8%, methylation: 2.1–3.7%). Of the two F1 hybrid pairs, while pair I showed genetic variation frequencies similar to that of the inbred parent with lower changing frequency and pair II was intermediate of those of the parents, both pairs showed frequencies of methylation alteration more or less intermediate of those of their inbred parental lines. Parent-of-origin effects in both genetic and methylation changes were detected in only one of the hybrid pairs (primarily pair II) for a given changing pattern. Statistical testing confirmed the genotypic difference in both genetic and methylation (hypomethylation) alterations among the regenerants. Taken together, it could be concluded that the frequency and pattern of both genetic and cytosine methylation alterations in maize tissue culture were largely genetic context-dependent traits, but stochasticity also played an important part. F1 hybrids were not significantly more stable than their inbred parental lines under tissue culture conditions." @default.
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- W2105801940 date "2011-02-09" @default.
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- W2105801940 title "Tissue culture-induced genomic alteration in maize (Zea mays) inbred lines and F1 hybrids" @default.
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- W2105801940 doi "https://doi.org/10.1111/j.1744-7348.2011.00458.x" @default.
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