Abstract
Abstract Interspecific F1 hybrid plants between Allium fistulosum L. and A. cepa L. exhibit bivalent pairing suggesting genomic homology; however, chromosomal variants exist rendering meiotic abnormalities. The occurrence of multivalent associations suggest at least 1 translocation differentiates the 2 species. The chromosome bearing the nucleolus organizer is apparently involved in the translocation. The presence of bridges and fragments in anaphase and telophase I also indicates the occurrence of at least 1 inversion. A minimum of 2 heteromorphic bivalents were observed which probably reflects the translocation and/or inversion(s).
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