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Titolo:
Genotypic diversity and clonal structure of everglades sawgrass, Cladium jamaicense (Cyperaceae)
Autore:
Ivey, CT; Richards, JH;
Indirizzi:
Univ Virginia, Blandy Expt Farm, Boyce, VA 22620 USA Univ Virginia Boyce VA USA 22620 a, Blandy Expt Farm, Boyce, VA 22620 USA Florida Int Univ, Dept Biol Sci, Miami, FL 33199 USA Florida Int Univ Miami FL USA 33199 v, Dept Biol Sci, Miami, FL 33199 USA
Titolo Testata:
INTERNATIONAL JOURNAL OF PLANT SCIENCES
fascicolo: 6, volume: 162, anno: 2001,
pagine: 1327 - 1335
SICI:
1058-5893(200111)162:6<1327:GDACSO>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUTSEDGE CYPERUS-ESCULENTUS; SPATIAL GENETIC-STRUCTURE; RELATIVE IMPORTANCE; FLORIDA EVERGLADES; ALLOZYME VARIATION; PLANT-POPULATIONS; BREEDING SYSTEMS; PATTERNS; REPRODUCTION; SEDGE;
Keywords:
allozymes; asexual reproduction; Cladium jamaicense; clonal structure; Everglades; genotypic diversity; sawgrass; wetlands;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Ivey, CT Univ Virginia, Blandy Expt Farm, 400 Blandy Farm Lane, Boyce, VA 22620 USA Univ Virginia 400 Blandy Farm Lane Boyce VA USA 22620 A 22620 USA
Citazione:
C.T. Ivey e J.H. Richards, "Genotypic diversity and clonal structure of everglades sawgrass, Cladium jamaicense (Cyperaceae)", INT J PL SC, 162(6), 2001, pp. 1327-1335

Abstract

The extent of asexual reproduction and the spatial distribution of clones can influence ecological and evolutionary processes in populations. Sawgrass, Cladium jamaicense, which is the dominant ecosystem component in the Florida Everglades, can reproduce sexually and asexually. We examined patternsof genotypic diversity and evaluated the importance of clonal reproductionin Everglades populations of C. jamaicense, using allozymes as genetic markers. We sampled plants in a replicated grid along 11-m transects in 18 populations of sawgrass distributed throughout the Everglades. Genotypic diversity was low in Everglades sawgrass populations, compared with other plants(mean [SE] number of multilocus genotypes per population = 4.9 [0.7]), butonly one population was monomorphic. Diversity was present even at a smallscale; 85 of 108 1-m(2) quadrats had more than one multilocus genotype. South Florida water management areas did not differ with respect to genotypicdiversity, except for Everglades National Park, which had populations witha smaller proportion of polymorphic quadrats. Sawgrass clones were closer together than nonclones on average, although this varied among populations. Despite this observation, we found little evidence for spatial structuringof clones using the method of probability of clonal identity. This result reflected the broad interdigitation of clones along transects. Estimated mean (SE) minimum clone size was 46.2 (5.2) m(2) and clones may reach over 200 m(2). Our results indicate that asexual reproduction is common in C. jamaicense populations but that genotypic diversity is maintained throughout the ecosystem, even at relatively small scales.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 06:59:30