EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Extensive variation in the levels of genetic diversity and degree of relatedness among five species of Cypripedium (Orchidaceae)


American Journal of Botany 81(2): 175-184
Extensive variation in the levels of genetic diversity and degree of relatedness among five species of Cypripedium (Orchidaceae)
An electrophoretic analysis of allozyme variation from 14 loci in Cypripedium calceolus, C. candidum, C. arietinum, C. acaule, and C. reginae was conducted to address evolutionary conclusions reached in prior studies on the Orchidaceae. The following specific questions were examined: 1) Do the allozyme data suggest that C. arietinum be transferred to the genus Criosanthes? 2) Do Cypripedium populations contain unusually low levels of genetic variation relative to other angiosperms with comparable life histories? and 3) Is the distribution of genetic variation among populations consistent with the idea that evolutionary processes produce higher levels of among-population differentiation in the Orchidaceae? Very low Nei's genetic identities (0.000-0.285) were found for most species comparisons; however, C. arietinum was not the most genetically distinct taxon and should be retained in the genus Cypripedium. Although most Cypripedium populations contain very low levels of expected heterozygosity, C. calceolus contains unusually high levels in all populations examined. Most species examined here have below average levels of variation distributed among populations. This result indicates that evolutionary processes produce relatively lower, not higher, levels of genetic differentiation among Cypripedium populations compared to other flowering plants. Historical events that could have influenced the observed genetic patterns are discussed. Reprinted by permission of the publisher. .


Accession: 002379254

DOI: 10.2307/2445631



Related references

Two pairs of vicarious species of Cypripedium (Orchidaceae) from eastern Asia and eastern North America Cypripedium reginae and Cypripedium flavum and the other pair Cypripedium arietinum and Cypripedium plectrochilon. Brittonia 35(2): 159-163, 1983

Genetic diversity of an endangered plant, Cypripedium macranthos var. rebunense (Orchidaceae): background genetic research for future conservation. Conservation genetics 8(6): 1369-1376, 2007

High levels of allozyme variation within Cypripedium calceolus (Orchidaceae) and low levels of divergence among its varieties. Systematic Botany 18(4): 663-677, 1993

Genetic diversity and phylogenetic relatedness among six endemic Pterostylis species (Orchidaceae; series Grandiflorae) of Western Australia, as revealed by allozyme polymorphisms. Biochemical Systematics and Ecology 29(7): 697-710, 2001

Genetic diversity and phylogenetic relatedness among six endemic Pterostylis species (Orchidaceae; series Grandiflorae) of Western Australia, as revealed by allozyme polymorphisms. Biochemical Systematics and Ecology 29(7): 697-710, 2001

Genetic diversity, compatibility patterns and seed quality in isolated populations of Cypripedium calceolus Orchidaceae. Conservation Genetics 13(1): 89-98, 2012

Genetic structure and clonal diversity of Cypripedium flavum (Orchidaceae) populations from South-West China. Acta Botanica Yunnanica 30(1): 69-75, 2008

Genetic variation in Massachusetts populations of Cypripedium arietinum R. Brown in Ait. and C. acaule Ait. (Orchidaceae). Rhodora 96(888): 354-369, 1994

Genetic diversity in Cypripedium calceolus (Orchidaceae) with a focus on north-western Europe, as revealed by plastid DNA length polymorphisms. Annals of Botany 104(3): 517-525, 2009

Ultrastructure of glandular ovarian trichomes of cypripedium calceolus and cypripedium reginae orchidaceae. American Journal of Botany 67(5): 784-789, 1980