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Titolo:
Differences in genetic structure between two Japanese beech (Fagus crenataBlume) stands
Autore:
Takahashi, M; Mukouda, M; Koono, K;
Indirizzi:
Forest Tree Breeding Ctr, Tohoku Reg Breeding Off, Takizawa, Iwate 0200173, Japan Forest Tree Breeding Ctr Takizawa Iwate Japan 0200173 wate 0200173, Japan Forest Tree Breeding Ctr, Hokkaido Reg Breeding Off, Ebetsu, Hokkaido 0690836, Japan Forest Tree Breeding Ctr Ebetsu Hokkaido Japan 0690836 ido 0690836, Japan
Titolo Testata:
HEREDITY
fascicolo: 1, volume: 84, anno: 2000,
pagine: 103 - 115
SICI:
0018-067X(200001)84:1<103:DIGSBT>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPATIAL AUTOCORRELATION ANALYSIS; AUTO-CORRELATION ANALYSIS; SYLVATICA L BEECH; NATURAL STANDS; POPULATIONS; SIMULATION; INFERENCES; BIOLOGY; FOREST; MODEL;
Keywords:
Fagus crenata; founder effect; isozyme variability; linkage disequilibrium; self-thinning; spatial autocorrelation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Takahashi, M Forest Tree Breeding Ctr, Tohoku Reg Breeding Off, Takizawa, Iwate 0200173, Japan Forest Tree Breeding Ctr Takizawa Iwate Japan 0200173 Japan
Citazione:
M. Takahashi et al., "Differences in genetic structure between two Japanese beech (Fagus crenataBlume) stands", HEREDITY, 84(1), 2000, pp. 103-115

Abstract

To examine the effects of forest cutting on within-population genetic structure, the genetic structure and variability of two Japanese beech (Fagus crenata Blume) stands with contrasting histories in relation to cutting wereinvestigated. Six hundred and sixty beech trees, covering two hectares in total, were mapped and genetically analysed using nine isozyme loci encoding eight enzyme systems. The proportion of polymorphic loci, the average number of alleles per locus, the effective number of alleles per locus, the expected heterozygosity and the observed heterozygosity were 78, 3.3, 1.31, 0.200 and 0.189, respectively, in a secondary stand (designated AK) cut during the 1920s. Corresponding figures were 78, 3.3, 1.33, 0.203 and 0.193, respectively, in a primary stand designated KU. The inbreeding coefficient and the grand mean of the number of alleles in common (NAC) were 0.055 and 1.684 in AK, and 0.042 and 1.649 in KU, respectively. The genetic variabilitywas slightly but significantly lower in AK. The genetic structure of the two stands was strikingly different. The proportions of positively significant Moran's I and SND values found in the shortest distance class were 0.86 and 0.38 for AK, and 0.14 and 0.29 for KU, respectively. Furthermore, significant linkage disequilibrium was observed in AK, but none at all in KU. Toexamine which, if any, differences in the genetic structure would be likely to influence succeeding generations, we simulated a self-thinning process. The simulation suggested that reduced genetic variability and linkage disequilibrium would have significant influence in the AK stand for several generations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 12:37:25