The Peterhof Collection of spontaneous meiotic mutants of rye was used as a model to study the genetic control of meiosis key events in an organism with a large genome. A combination of methods, which included fluorescence in situ DNA-DNA hybridization, sequencing of recombinogenic proteins, and immunocytochemical analysis of meiosis proteins, clearly showed that mutation sy1 affects recombination events, asynapsis in mutant sy9 is connected with defects of the assembly of synaptonemal complex axial cores, and that synapsis defects in mutant sy10 are coupled with the presence of protein Zyp1 in the core region. The assembly of proteins Asy1 and Zyp1 on the axes of meiotic chromosomes was shown to occur separately, which is a specific feature of rye, as compared to arabidopsis.
Russian Journal of Genetics – Springer Journals
Published: Oct 13, 2010
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