Abstract
The pattern of chromosome association at first metaphase of meiosis in interspecific hybrids of the natural hexaploid Festuca arundinacea and the diploid Lolium perenne was examined in order to investigate the relationship between a pairing control system previously isolated in L. perenne and that present in the hexaploid F. arundinacea. The pairing pattern at meiosis in the hybrids was clearly modified by the genotype of L. perenne and by the presence of B chromosomes. Whereas chromosome association (homoeologous) in F. arundinacea × L. perenne genotype Lp10 without B chromosomes was extensive it was almost absent in the hybrids involving L. perenne genotype Lp19 containing B chromosomes. Two alternative interpretations are suggested for the relationship between the two pairing control systems.
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Evans, G., Aung, T. The influence of the genotype of Lolium perenne on homoeologous chromosome association in hexaploid Festuca arundinacea. Heredity 56, 97–103 (1986). https://doi.org/10.1038/hdy.1986.13
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DOI: https://doi.org/10.1038/hdy.1986.13
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