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Titolo:
Genetic structure of natural populations of Gelidium species: A re-evaluation of results
Autore:
Sosa, PA; Valero, M; Batista, F; Gonzalez-Perez, MA;
Indirizzi:
Univarys Plamas Gran Canaria, Dept Biol, Las Palmas Gran Canaria 35017, Can Univ Las Plamas Gran Canaria Las Palmas Gran Canaria Canary Islands Spain 35017 Univ Lille 1, Lab Genet & Evolut Populat Vegetales, CNRS, URA 1185, F-59655 Univ Lille 1 Villeneuve Dascq France F-59655 es, CNRS, URA 1185, F-59655
Titolo Testata:
JOURNAL OF APPLIED PHYCOLOGY
fascicolo: 3, volume: 10, anno: 1998,
pagine: 279 - 284
SICI:
0921-8971(1998)10:3<279:GSONPO>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
ISOZYME ELECTROPHORESIS; VARIABILITY; RHODOPHYTA; DIFFERENTIATION; DIVERSITY; FUCALES;
Keywords:
Canary Islands; electrophoresis; F-statistics; Gelidium canariensis; Gelidium arbuscula; genetic distance; genetic structure; isozymes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Sosa, PA UnivnLas Plamas Gran Canaria, Dept Biol, Campus Univ Tafira, Las Palmas Gra Univ Las Plamas Gran Canaria Campus Univ Tafira Las Palmas Gran Canaria Canary Islands Spain 35017
Citazione:
P.A. Sosa et al., "Genetic structure of natural populations of Gelidium species: A re-evaluation of results", J APPL PHYC, 10(3), 1998, pp. 279-284

Abstract

Twenty-two loci were re-evaluated to assess genetic variation and differentiation in three natural populations (two from Gran Canaria and one from Tenerife) of Gelidium (G. canariensis and G. arbuscula). The new data using exclusively the diploid subpopulation gene frequencies confirm that dispersal was restricted over short distances for the two species, but contrary to previous conclusions, the data reveal that these two closely related species differed markedly by their mating systems and patterns of genetic differentiation. Genetic differentiation among populations was twice as high in G.arbuscula as in G. canariensis. It was confirmed that the mean way of reproduction is asexual in G. arbuscula and a discussion included as to how clonal propagation may explain the difference in haploid and diploid allele frequencies in this species. There was no evidence for asexual reproduction in G. canariensis. Heterozygote deficiency could be explained simply by spatial sub-structuring within populations. The importance of the sampling design in determining the level and pattern of genetic differentiation within aspecies is discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 14:03:40