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Titolo:
HIGH-LEVELS OF GENE FLOW IN BUR OAK REVEALED BY PATERNITY ANALYSIS USING MICROSATELLITES
Autore:
DOW BD; ASHLEY MV;
Indirizzi:
BUFFALO STATE COLL,DEPT BIOL BUFFALO NY 14222 UNIV ILLINOIS,DEPT BIOL SCI MC 066 CHICAGO IL 60607
Titolo Testata:
The Journal of heredity
fascicolo: 1, volume: 89, anno: 1998,
pagine: 62 - 70
SICI:
0022-1503(1998)89:1<62:HOGFIB>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPATIAL AUTO-CORRELATION; POLLEN DISPERSAL; QUERCUS-MACROCARPA; NATURAL-POPULATION; PLANT-POPULATIONS; PINE; PARENTAGE; AUTOCORRELATION; EVOLUTION; ALLELES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
B.D. Dow e M.V. Ashley, "HIGH-LEVELS OF GENE FLOW IN BUR OAK REVEALED BY PATERNITY ANALYSIS USING MICROSATELLITES", The Journal of heredity, 89(1), 1998, pp. 62-70

Abstract

Microsatellite analysis was used to characterize pollen dispersal in a stand of 62 adult bur oaks (Quercus macrocarpa) in northern Illinois. Using POP amplification of four dinucleotide microsatellite loci, pollen donors of 282 acorns collected from three adult trees located in different parts of the stand were determined by exclusion. Overall at least 57% of the scorns were pollinated by trees outside of the stand,because all adult trees in the stand were excluded from paternity, Average pollination distance for within-stand pollinations was 75 m, andpollen donors for two of the three maternal trees were randomly dispersed throughout the stand. These two trees also received more pollen from 50 m away than from near neighbors, Self-pollination was rare or nonexistent, This study provides direct evidence for high levels of long-distance pollination in a wind-pollinated species, and contradicts traditional models of wind pollination which suggest that clouds of pollen dissipate from the source to ineffectively low densities over short distances. Instead, the mating system of bur oak seems to be extraordinarily efficient at producing highly outbred individuals and ensuring long-range pollen flow, perhaps through pollen competition or mate choice favoring distant pollen sources.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 16:15:27