CHROMOSOME NUMBERS IN NORTH AMERICAN LORANTHACEAE: (ARCEUTHOBIUM,PHORADENDRON, PSITTACANTHUS,STRUTHANTHUS) |
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Authors: | Delbert Wiens |
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Institution: | Department of Biology and Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado |
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Abstract: | Chromosome numbers are reported from 67 populations of 36 taxa, mostly in Phoradendron. The basic number is 14 in Phoradendron and probably also in Arceuthobium. The 4 species of Struthanthus for which chromosome numbers are recorded suggest that the basic number is 8. Numbers of n = 8 and n = 10 have been reported for Psittacanthus. In Phoradendron the 22 taxa examined are all diploid, although 1 instance of polyploidy was discovered. Objects interpreted as supernumerary chromosomes were discovered in a number of species of Phoradendron; no evidence of sex chromosomes previously reported in Phoradendron was observed. The Loranthaceae have chromosomes comparable in size to the largest in the plant kingdom. |
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