Low allozyme diversity in Schwalbea americana (Scrophulariaceae), an endangered plant species
Article Abstract:
A study was conducted to describe allozyme diversity in Schwalbea americana, a hemiparasitic endangered perennial herb, using a sample of 13 populations at 15 presumptive loci. Genetic diversity was found to be low for the species, within populations and for polymorphic loci. No polymorphism was detected in seven populations. Three loci were polymorphic across the species' range but frequencies of uncommon alleles were low. These suggested that population extinctions, decreases in population sizes and habitat fragmentation may account for low genetic diversity.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1998
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A population genetic analysis of Ziziphus celata, an endangered Florida shrub
Article Abstract:
Genetic diversity and clonal structure in the endangered shrub, Ziziphus celata, were studied using allozyme analysis. Results indicate that the species is multiclonal and that as much as 25% of the 13 enzyme systems' putative loci were polymorphic. Further, Ziziphus does not undergo sexual reproduction in situ. Conservation of this species in the wild may entail provisions for genotypic diversity to promote sexual reproduction in this self-incompatible shrub.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1997
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Allozyme variation in two Great Smoky Mountain endemics: Glyceria nubigena and Rugelia nudicaulis
Article Abstract:
Rugelia nudicaulis (Asteraceae) and Glyceria nubigena (Poaceae) were evaluated to determine the extent of genetic diversity using allozyme variation. The two plant species endemic to the Great Smoky Mountains are both candidates for federal protection. Poaceae did not display allozyme variation, while different levels of such variation were observed for Asterceae.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1995
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