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Brief Communications Arising
Nature 443, E8 (28 September 2006) | doi:10.1038/nature05251; Published online 27 September 2006
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Plant genetics: Increased outcrossing in hothead mutants
Peng Peng1,2, Simon W.-L. Chan2,3, Govind A. Shah2 & Steve E. Jacobsen1,2
Abstract
Arising from: S. J. Lolle, J. L. Victor, J. M. Young & R. E. Pruitt Nature 434, 505–509 (2005); Lolle et al. reply
Lolle et al.1 report that loss-of-function alleles of the HOTHEAD (HTH) gene in Arabidopsis thaliana are genetically unstable, giving rise to wild-type revertants. On the basis of the reversion of many other genetic markers in hth plants, they suggested a model in which a cache of extragenomic information could cause genes to revert to the genotype of previous generations. In our attempts to reproduce this phenomenon, we discovered that hth mutants show a marked tendency to outcross (unlike wild-type A. thaliana, which is almost exclusively self-fertilizing2). Moreover, when hth plants are grown in isolation, their genetic inheritance is completely stable. These results may provide an alternative explanation for the genome wide non-mendelian inheritance reported by Lolle et al.
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RESEARCH
Plant genetics Hothead healer and extragenomic informationNature Brief Communication (01 Sep 2005)
Increased outcrossing in hothead mutants (Reply)Nature Brief Communication (28 Sep 2006)
Genome-wide non-mendelian inheritance of extra-genomic information in ArabidopsisNature Letters to Editor (24 Mar 2005)
RNA-mediated epigenetic programming of a genome-rearrangement pathwayNature Article (10 Jan 2008)
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