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The maintenance of genome stability is a key issue for all living organisms. Structural maintenance of chromosomes 5/6 (SMC5/6) complex is a crucial factor for preserving genome stability. Here, we found that mutations of SMC5/6 complex subunits reduced the plant fertility by producing the aborted ovules and paternally-inherited abnormal seeds. The mutations show an absence of chromosome segregation in the first and/or the second meiotic division leading to the unreduced male gametes which results in triploid offspring. Our results reveal a novel function of SMC5/6 complex in maintaining stable ploidy during generations in
Arabidopsis thaliana.
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