Abstract
In this study, we identified 19 intron losses, including 11 precise intron losses (PILs), six imprecise intron losses (IILs), one de-exonization, and one exon deletion in tomato and potato, and 17 IILs in Arabidopsis thaliana. Comparative analysis of related genomes confirmed that all of the IILs have been fixed during evolution. Consistent with previous studies, our results indicate that PILs are a major type of intron loss. However, at least in plants, IILs are unlikely to be as rare as previously reported.ReviewersThis article was reviewed by Jun Yu and Zhang Zhang. For complete reviews, see the Reviewers’ Reports section.Electronic supplementary materialThe online version of this article (doi:10.1186/s13062-015-0056-7) contains supplementary material, which is available to authorized users.
Highlights
In this study, we identified 19 intron losses, including 11 precise intron losses (PILs), six imprecise intron losses (IILs), one de-exonization, and one exon deletion in tomato and potato, and 17 IILs in Arabidopsis thaliana
The first type of event is precise intron loss (PIL); in this case, intron losses do not affect the integrity of flanking exons
The second type of event is imprecise intron loss (IIL), which is accompanied by the insertion and/or deletion of nucleotides into/from flanking exons
Summary
We identified 19 intron losses, including 11 precise intron losses (PILs), six imprecise intron losses (IILs), one de-exonization, and one exon deletion in tomato and potato, and 17 IILs in Arabidopsis thaliana. The second type of event is imprecise intron loss (IIL), which is accompanied by the insertion and/or deletion (indel) of nucleotides into/from flanking exons.
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