Abstract
Failure of association of homologous chromosomes at diakinesis and metaphase I was observed in two sterile plants of pepper in the first generation following X-irradiation of the pollen. The degree of asynapsis differed in the two plants. Univalents were more frequent in the X1 plant from the 2000 r treatment than in the plant isolated from the X1 following exposure of the pollen to 500 r. Irregular distribution of chromosomes was observed at anaphase I, telophase I and during the second division. The spores derived from a single microsporocyte were often atypical in size and number; micronuclei were evident in many of the spores.
