The interchromosomal effect of inversions in maize |
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Authors: | Carolyn M. McKinley and Stephen L. Goldman |
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Affiliation: | (1) Department of Biology, University of Toledo, 43606 Toledo, Ohio, USA;(2) Present address: Division of Biology, Oak Ridge National Laboratories, P.O. Box Y, Oak Ridge, Tennessee, USA |
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Abstract: | Summary The interchromosomal effect of inversions in maize along the short arm of chromosome 9 yields results which are distinctly different from those which are reported with Drosophila melanogaster. Recombination was increased in the c1-sh1 region of chromosome 9 while the sh1-wx region was unaffected. This increased frequency of recombination appears to be due to an increase in single exchange events as multiple events were unchanged. Increases in recombination were accompanied by either an increase in chromosome interference or normal interference levels. The magnitude of increase in recombination was much smaller than that seen in interchromosomal effects in Drosophila and is consistent with other observations made in maize. When two inversions were present in the same nucleus simultaneously, the effect on recombination was of the same magnitude as the effect of a single inversion. All inversions tested, regardless of size or position with respect to the centromere showed the same magnitude of increase. |
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