DNA methylation and genetic degeneration of the Y chromosome in the dioecious plant Silene Iatifolia

0495519 - BFÚ 2019 RIV US eng J - Journal Article
Lorenzo, Jose Luis Rodriguez - Hobza, Roman - Vyskot, Boris
DNA methylation and genetic degeneration of the Y chromosome in the dioecious plant Silene Iatifolia.
BMC Genomics. Roč. 19, JUL 16 2018 (2018). ISSN 1471-2164. E-ISSN 1471-2164
R&D Projects: GA ČR GBP501/12/G090
Institutional support: RVO:68081707
Keywords : sex-linked genes * repetitive sequences * epigenetic control * melandrium-album * latifolia * evolution * expression * region * maize * Epigenetics * Sex chromosomes
OECD category: Genetics and heredity (medical genetics to be 3)
Impact factor: 3.501, year: 2018

Background: S. Iatifolia is a model organism for the study of sex chromosome evolution in plants. Its sex chromosomes include large regions in which recombination became gradually suppressed. The regions tend to expand over time resulting in the formation of evolutionary strata. Non-recombination and later accumulation of repetitive sequences is a putative cause of the size increase in the Y chromosome. Gene decay and accumulation of repetitive DNA are identified as key evolutionary events. Transposons in the X and Y chromosomes are distributed differently and there is a regulation of transposon insertion by DNA methylation of the target sequences, this points to an important role of DNA methylation during sex chromosome evolution in Silene Iatifolia. The aim of this study was to elucidate whether the reduced expression of the Y allele in S. Iatifolia is caused by genetic degeneration or if the cause is methylation triggered by transposons and repetitive sequences.
Permanent Link: http://hdl.handle.net/11104/0288485