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Science 10 May 1985:
Vol. 228. no. 4700, pp. 731 - 733
DOI: 10.1126/science.228.4700.731
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Articles

Recurring Origins of Allopolyploid Species in Asplenium

CHARLES R. WERTH 1, SHELDON I. GUTTMAN 2, and W. HARDY ESHBAUGH 3

1 Mountain Lake Biological Station, University of Virginia, Pembroke 24136
2 Department of Zoology, Miami University, Oxford, Ohio 45056
3 Department of Botany, Miami University

A large proportion of plant species has originated through allopolyploidy: interspecific hybridization followed by chromosome doubling. Heterozygosity remains fixed in allopolyploids because of nonsegregation of parental chromosomes. Two allotetraploid species of the fern genus Asplenium show allozyme polymorphisms at loci that are polymorphic in their diploid progenitors, indicating that each has originated more than once and implicating continued gene flow from diploids to tetraploids.

Submitted on July 16, 1984
Accepted on December 7, 1984


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Genetic variation in the allotetraploid Dryopteris corleyi (Dryopteridaceae) and its diploid parental species in the Iberian Peninsula.
A. Jimenez, L. G. Quintanilla, S. Pajaron, and E. Pangua (2009)
Am. J. Botany 96, 1880-1886
   Abstract »    Full Text »    PDF »
Isozyme variation and genetic relationships among taxa in the Asplenium obovatum group (Aspleniaceae, Pteridophyta).
A. Herrero, S. Pajaron, and C. Prada (2001)
Am. J. Botany 88, 2040-2050
   Abstract »    Full Text »    PDF »
The role of genetic and genomic attributes in the success of polyploids.
P. S. Soltis and D. E. Soltis (2000)
PNAS 97, 7051-7057
   Abstract »    Full Text »    PDF »


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