Abstract
Normal synaptonemal complexes have been found in haploid barley meiotic prophase at stages equivalent to pachytene in diploids. Reconstructions of serially sectioned nuclei have shown that up to 60% of the haploid chromosomes may pair in either intra- or interchromosomal associations. The extent and nature of the synaptonemal complex formation suggest that the chromosome pairing is non-homologous. From the virtual absence of chiasmata in metaphase I stages of the haploids it is inferred that crossing over requires a more precise DNA alignment than is provided by synaptonemal complex formation alone.
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Gillies, C.B. The nature and extent of synaptonemal complex formation in haploid barley. Chromosoma 48, 441–453 (1974). https://doi.org/10.1007/BF00290998
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DOI: https://doi.org/10.1007/BF00290998