Abstract
K034 is an asexual mutant of dioecious Silene latifolia. It has asexual and female-like flowers in the ratio of roughly nine to one. The asexual flower has no matured stamens and carpels whereas the female-like flower has two carpels. Both asexual and female-like flowers are similar to the male flower in the early stage. They have smaller fourth whorls than the female has. In the late stage, both carpel and stamen primordia are suppressed in the asexual flower but the carpel primordium in the female-like flower continues to grow. As stamens of the wild-type male are elongated, SLM1 and SLM2 were expressed in the stamens but neither of them was expressed in stamens of the asexual flower. We examined 11 STSs scattered on the Y chromosome in K034. Six STSs are present but five STSs are absent. These five locate on the p-arm of the Y chromosome.
