Abstract

An achiasmatic meiosis is observed in microsporocytes of Fritillaria japonica group, in which paired chromosomes devoid of chiasmata are continuosly maintained through meiotic prophase. Experiments were aimed at examining whether the chromosome pairing is associated with normal synaptinemalcomplex (SC) structure. Examination in the electron micrscope of pachytene cells showed that the SC was present in all cross-sections through the chromosomes, and the SC seemed to be normal in appearance and dimension.

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