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Titolo:
Natural selection causing microsatellite divergence in wild emmer wheat atthe ecologically variable microsite at Ammiad, Israel
Autore:
Li, YC; Roder, MS; Fahima, T; Kirzhner, VM; Beiles, A; Korol, AB; Nevo, E;
Indirizzi:
Univ Haifa, Inst Evolut, IL-31905 Haifa, Israel Univ Haifa Haifa Israel IL-31905 fa, Inst Evolut, IL-31905 Haifa, Israel Inst Plant Genet & Crop Plant Res, D-06466 Gatersleben, Germany Inst PlantGenet & Crop Plant Res Gatersleben Germany D-06466 n, Germany
Titolo Testata:
THEORETICAL AND APPLIED GENETICS
fascicolo: 7, volume: 100, anno: 2000,
pagine: 985 - 999
SICI:
0040-5752(200005)100:7<985:NSCMDI>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
STEPWISE MUTATION MODEL; ARABIDOPSIS-THALIANA; GENETIC DIVERSITY; SPATIAL AUTOCORRELATION; TRITICUM-DICOCCOIDES; ALLELE FREQUENCIES; DNA; POPULATIONS; EVOLUTION; LOCI;
Keywords:
natural selection; microecological diversity; microsatellites; adaptation; T. dicoccoides; wild emmer wheat;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
64
Recensione:
Indirizzi per estratti:
Indirizzo: Nevo, E Univ Haifa, Inst Evolut, IL-31905 Haifa, Israel Univ Haifa HaifaIsrael IL-31905 Evolut, IL-31905 Haifa, Israel
Citazione:
Y.C. Li et al., "Natural selection causing microsatellite divergence in wild emmer wheat atthe ecologically variable microsite at Ammiad, Israel", THEOR A GEN, 100(7), 2000, pp. 985-999

Abstract

Genetic diversity at 28 microsatellite loci was studied in a natural population of Triticum dicoccoides at the Ammiad microsite, north of the Sea of Galilee, Israel. This microsite was subdivided into four major habitats, North, Valley, Ridge and Karst, and further subdivided into nine subhabitats. The units thus defined showed strong and highly significant differentiation in ecological factors; in particular with respect to cover, proximity andheight of rocks, and surface soil moisture after early rains. The results showed that allele distributions at microsatellite loci were nonrandom and associated with habitats. Significant genetic differentiation and variationin repeat number were found among subpopulations in the four major habitats and nine subhabitats. Habitat-specific and -unique alleles and linkage disequilibria were observed in the Karst subpopulation. The subpopulations dwelling in drier habitats and subhabitats showed higher genetic diversities at microsatellite loci. These results suggest that natural selection, presumably through aridity stress, acts upon microsatellite divergence predominantly on noncoding sequences, thereby contributing to differences in fitness.

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Documento generato il 24/09/20 alle ore 05:23:03