HORDEUM AND SECALE MITOTIC GENOMES LIE APART IN A HYBRID

  • 1 January 1981
    • journal article
    • research article
    • Vol. 52  (DEC) , 391-403
Abstract
In both unpretreated root tip metaphases and pretreated mitoses of H. vulgare L. cv. Sultan .times. S. africanum Stapf F1 hybrids, Hordeum chromosomes tended to be nearer the center of the mitosis than Secale chromosomes. This was clear in 4 serially sectioned cells examined in the EM. In Feulgen squashes of 38 of 40 cells studied in the light microscope, the mean distances in each cell from the mean centromere position for the cell was less for Hordeum centromeres than for Secale centromeres. Such spatial separation of parent genomes might prevent pairing of homeologs in hybrids.

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