HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (16) Citing Articles via Google Scholar Google Scholar Articles by Allphin, L. Articles by Harper, K. T. Search for Related Content PubMed Articles by Allphin, L. Articles by Harper, K. T. Agricola Articles by Allphin, L. Articles by Harper, K. T.

Genetic diversity and gene flow in the endangered dwarf bear poppy, Arctomecon humilis (Papaveraceae)¹

^a Department of Biology, University of Utah, Salt Lake City, Utah 84112; ^b Garrett Herbarium, Utah Museum of Natural History, University of Utah, Salt Lake City, Utah 84112; and ^c Department of Botany and Range Science, Brigham Young University, Provo, Utah 84602

Arctomecon humilis is a critically endangered species endemic to the Moenkopi shale of Washington County, Utah. Recovery plans for the species would be improved by an understanding of genetic diversity and gene flow among its remaining populations. Ten variable isozyme loci were used to calculate genetic diversity statistics for study populations. Westerly populations possessed higher levels of genetic variability than other populations at the same isozyme loci. Three of the populations exhibited significant deviations from Hardy-Weinberg expectations. No correlation existed between genetic distance and geographic distance. Most of the genetic diversity was distributed among populations with little gene flow between populations, suggesting that observed genetic differences may arise from genetic drift. For the westerly populations, similar genotypes were observed in the seedling and old age classes, while intermediate age classes typically possessed an alternate set of genotypes at Pgi-2. Mean heterozygosity increased with age class across populations. Westerly populations of A. humilis shared more alleles with the nearest geographic population of A. californica than other populations. Since the westerly populations contained more genetic variability and more alleles in common with a near relative, they may be relictual. Other populations may contain less genetic diversity due to founder effects and/or genetic drift.

Key Words: Arctomecon • bear poppy • heterozygosity • gene flow • genetic diversity • Papaveraceae

This article has been cited by other articles:

				M. C. Neel and N. C. Ellstrand Patterns of allozyme diversity in the threatened plant Erigeron parishii (Asteraceae) Am. J. Botany, May 1, 2001; 88(5): 810 - 818. [Abstract] [Full Text] [PDF]

				M. A. Gitzendanner and P. S. Soltis Patterns of genetic variation in rare and widespread plant congeners Am. J. Botany, June 1, 2000; 87(6): 783 - 792. [Abstract] [Full Text]

				K. Schmidt and K. Jensen Genetic structure and AFLP variation of remnant populations in the rare plant Pedicularis palustris (Scrophulariaceae) and its relation to population size and reproductive components Am. J. Botany, May 1, 2000; 87(5): 678 - 689. [Abstract] [Full Text]