+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Genetic differentiation between Carex lasiocarpa and C. pellita (Cyperaceae) in North America

Genetic differentiation between Carex lasiocarpa and C. pellita (Cyperaceae) in North America

American Journal of Botany 81(2): 224-231

Carex lasiocarpa and C. pellita (sect. Carex) share a very similar morphology and have overlapping ranges in North America, but are found in different habitats characterized by contrasting soil types and pH. We studied allozyme variation and chromosome numbers to assess genetic differentiation between the two taxa. Both principal components analysis on the allele frequencies from 12 putative enzyme-coding loci and cluster analysis of genetic identities separated 51 sampled populations into two groups that were consistent with recognized structural differences between C. lasiocarpa and C. pellita. Mean within-group genetic identities were 0.95 for C. lasiocarpa and 0.93 for C. pellita; mean between-group genetic identity was 0.81. With the exception of two rare alleles, the alleles of C. pellita were a subset of those found in C. lasiocarpa. Principal components analysis of measurements of structural characters from voucher specimens representing 46 populations also separated the two species with minimal overlap. Meiotic squashes of microsporocytes revealed haploid chromosome numbers of 38 and 38 + 1 for C. lasiocarpa and 41 and 40 + 1 for C. pellita. These data support the continued recognition of the two taxa as distinct species, and suggest that C. pellita may be a daughter species still in the process of divergence from C. lasiocarpa. Reprinted by permission of the publisher. .

(PDF emailed within 0-6 h: $19.90)

Accession: 002390637

Download citation: RISBibTeXText

DOI: 10.2307/2445637

Related references

Patterns of allozyme variation and clonal diversity in Carex lasiocarpa and C. pellita (Cyperaceae). American Journal of Botany 80(11): 1251-1263, 1993

Carex juniperorum (Cyperaceae), a new species from northeastern North America, with a key to Carex sect. Phyllostachys. Systematic Botany 18(3): 496-501, 1993

Carex reznicekii, a new widespread species of Carex section acrocystis (Cyperaceae) from eastern North America. SIDA Contributions to Botany 22(2): 1049-1070, 2006

Allozyme evidence for the hybrid origin of the maritime species carex salina and carex recta cyperaceae in eastern north america. Systematic Botany 15(2): 182-191, 1990

Genetic differentiation and hybridization between carex gynodynama and carex mendocinensis cyperaceae in california usa. American Journal of Botany 77(6): 826-838, 1990

Genetic differentiation of carex flava and carex viridula in west europe cyperaceae. Systematic Botany 16(1): 41-49, 1991

Anatomical studies of carex cuchumatanensis carex decidua and carex hermannii cyperaceae and comparisons with north american taxa of the carex acuta complex. Brittonia 39(1): 11-19, 1987

Carex pumila (Cyperaceae) in North America. Castanea 58(3): 220-224, 1993

Seven new species and one new combination in Carex (Cyperaceae) from North America. Novon 12(4): 508-532, 2002

The taxonomy of the carex pensylvanica complex cyperaceae in north america. Canadian Journal of Botany 61(6): 1692-1717, 1983

Carex secalina Cyperaceae, an Introduced Sedge New to North America. Rhodora 114(960): 349-365, 2012

Sectional names in Carex (Cyperaceae) for the flora of North America. Novon 11(4): 454-459, 2001

The taxonomy of Carex petricosa (Cyperaceae) and related species in North America. Rhodora 96(888): 295-310, 1994

Speciation and relationships of the acutae group of carex cyperaceae in north america. International Botanical Congress Abstracts 17: 277, 1987

Nomenclatural changes in the carex pensylvanica group section acrocystis cyperaceae of north america. SIDA Contributions to Botany 13(4): 449-452, 1989