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Titolo:
FINE-SCALE GENETIC-STRUCTURE OF A TURKEY OAK FOREST
Autore:
BERG EE; HAMRICK JL;
Indirizzi:
KENAI NATL WILDLIFE REFUGE,POB 2139 SOLDOTNA AK 99669 UNIV GEORGIA,DEPT BOT ATHENS GA 30602 UNIV GEORGIA,SAVANNAH RIVER ECOL LAB ATHENS GA 30602 UNIV GEORGIA,DEPT GENET ATHENS GA 30602
Titolo Testata:
Evolution
fascicolo: 1, volume: 49, anno: 1995,
pagine: 110 - 120
SICI:
0014-3820(1995)49:1<110:FGOATO>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUTO-CORRELATION ANALYSIS; BY-DISTANCE MODEL; SPATIAL-AUTOCORRELATION; LIATRIS-CYLINDRACEA; PLANT-POPULATIONS; QUERCUS-LAEVIS; DIFFERENTIATION; PINE; GENOTYPES; BIOLOGY;
Keywords:
ALLOZYME; F STATISTICS; GENE FLOW; GENETIC STRUCTURE; ISOLATION-BY-DISTANCE; NEIGHBORHOOD SIZE; NUMBER-OF-ALLELES-IN-COMMON; QUERCUS LAEVIS; RANDOMIZATION; SPATIAL AUTOCORRELATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
46
Recensione:
Indirizzi per estratti:
Citazione:
E.E. Berg e J.L. Hamrick, "FINE-SCALE GENETIC-STRUCTURE OF A TURKEY OAK FOREST", Evolution, 49(1), 1995, pp. 110-120

Abstract

Theoretical models and computer simulations of the genetic structure of a continuous population predict the existence of patches of highly inbred individuals when gene how within the population is limited. A map of the three genotypes of a two-allele locus is expected to exhibitpatches of homozygotes embedded in a matrix of heterozygotes, when gene flow is limited. A search for such patch structure was made on a 160 X 160 m plot within a continuous 60 + ha old-growth stand of Quercuslaevis (turkey oak). Approximately 3400 trees were genotyped for 9 polymorphic loci using starch-gel electrophoresis, and the genetic structure was analyzed with spatial autocorrelation (both nominal and interval), hierarchical F statistics, and number-of-alleles-in-common. Adults (diameter at breast height > 0) and juveniles were analyzed separately but showed similar structure. While no distinct patch structure was found, a greater degree of relatedness was observed on a scale of 5 m-10 m than at greater distances, probably because of the limited acorn dispersal from maternal trees and a small amount of cloning by root sprouts. A computer simulation of a 10,000 tree forest breeding for 10,000 yr indicates that the effective neighborhood sizes (of randomly drawn seed- and pollen-donors) are both in excess of 440 individuals. The model thus cannot distinguish the observed data from panmictic mating.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 12:35:42