Am. J. Bot. Plant Physiology
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American Journal of Botany, Vol 84, 1536, Copyright © 1997 by Botanical Society of America, Inc.

GENETICS AND MOLECULAR BIOLOGY

Allozyme frequencies in New Jersey and North Carolina populations of Atlantic white-cedar, Chamaecyparis thyoides (Cupressaceae)

JE Kuser, TR Meagher, DL Sheely and A White

The present study was conducted to assess the distribution of genetic variation within and among populations of Chamaecyparis thyoides in both marginal and centrally located populations. Allozyme frequency analyses of ten loci from foliage of four New Jersey populations and two North Carolina populations of C. thyoides showed polymorphic loci = 50%, mean number of alleles per locus = 2.8, effective number of alleles per locus = 1.17, and expected heterozygosity = 0.14. Diversity was highest in two populations from southern New Jersey. The isolated population at High Point, New Jersey had only two polymorphic loci and expected heterozygosity of 0.03. There was no correlation between genetic and geographic distances among populations, implying that cedar must have possessed some means of long-distance dispersal at the end of the last glacial period, rather than advancing northward step by step.


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