Induced Synaptic Mutant from Mesophyll Cell Protoclones of Dihaploid Solanum tuberosum

Abstract

Summary A synaptic mutant showing a very abnormal meiotic chromosome pairing was individuated among plants regenerated from protoplasts treated with 0.025 % EMS, which results in an abnormally high frequency of univalents at diakinesis and metaphase I. As a consequence of univalent formation, the chiasma frequency was greatly reduced and the later stages of meiosis were highly irregular, resulting in high pollen sterility.