Studies on genetic mechanisms controlling expression of the monoecious character in spinach

菠菜通常被认为是雌雄异株的物种，而在某些品种和品系中可以找到兼具两性功能的雌雄同株个体。结果表明，雌雄同株性状由单个不完全显性基因决定。该基因位于距控制雌雄异株系X/Y距离1.6 cM的微卫星标记SO4的4.3 cM处。这表明雌雄同株基因与X/Y基因对等位或紧密连锁。

Spinach is generally considered as a dioecious species, while monoecious individuals with both sex functions can be found in certain varieties and lines. We showed that a single, incompletely dominant gene is responsible for the monoecious character. The gene was found to be located at a distance of 4.3cM from microsatellite marker SO4, which mapped 1.6cM from X/Y controlling sexual dimorphism in dioecious lines. This indicates that the monoecious gene is allelic to or closely linked to the X/Y gene pair.