Microsatellite polymorphism in natural populations of wild emmer wheat, Triticum dicoccoides, in Israel

2002 ◽  
Vol 104 (1) ◽  
pp. 17-29 ◽  
Author(s):  
T. Fahima ◽  
M. S. Röder ◽  
K. Wendehake ◽  
V. M. Kirzhner ◽  
E. Nevo
Keyword(s):  
Natural Populations ◽  
Triticum Dicoccoides ◽  
Wild Emmer Wheat ◽  
Emmer Wheat ◽  
Wild Emmer ◽  
Microsatellite Polymorphism

scholarly journals Solar Radiation-Associated Adaptive SNP Genetic Differentiation in Wild Emmer Wheat, Triticum dicoccoides

2017 ◽  
Vol 8 ◽  
Author(s):  
Jing Ren ◽  
Liang Chen ◽  
Xiaoli Jin ◽  
Miaomiao Zhang ◽  
Frank M. You ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Genetic Differentiation ◽  
Triticum Dicoccoides ◽  
Wild Emmer Wheat ◽  
Emmer Wheat ◽  
Wild Emmer

Geographic distribution and domestication of wild emmer wheat (Triticum dicoccoides)

2010 ◽  
Vol 58 (1) ◽  
pp. 11-53 ◽  
Author(s):  
Hakan Özkan ◽  
George Willcox ◽  
Andreas Graner ◽  
Francesco Salamini ◽  
Benjamin Kilian
Keyword(s):  
Geographic Distribution ◽  
Triticum Dicoccoides ◽  
Wild Emmer Wheat ◽  
Emmer Wheat ◽  
Wild Emmer

WILD EMMER WHEAT IN JORDAN: I. ECOTYPES AND PHENOTYPIC VARIATION

1997 ◽  
Vol 45 (1) ◽  
pp. 31-37 ◽  
Author(s):  
A.A. Jaradat
Keyword(s):  
Principal Component ◽  
Triticum Dicoccoides ◽  
Wild Emmer Wheat ◽  
Emmer Wheat ◽  
Wild Emmer ◽  
Mean Values ◽  
Pairwise Correlation ◽  
Distributional Range ◽  
Central Regions ◽  
Productive Traits

Univariate and multivariate analyses and numerical taxonomy procedures were utilized on the standardized mean values of 17 quantitative traits in the base collection of wild emmer wheat,Triticum dicoccoidesKorn., from Jordan, in an effort to identify ecotypes by trait measurements. Five ecotypes were identified on the basis of morphological, developmental, and productive traits. The five ecotypes exhibited different adaptive trait complexes as revealed by principal component and pairwise correlation analyses. It is postulated that particular environmental conditions across the distributional ranges of the species in Jordan resulted in the evolution of adaptive gene complexes which are conserved by genetic linkage or natural selection. The five ecotypes represented the marginal, peripheral, and central distributional range of the species in the country. Two extreme and three intermediate ecotypes were recognized. The extreme ecotypes represent the “grassy” and “robust” types recognized earlier. The three intermediate ecotypes differed markedly from the former two and from each other. They exhibited different patterns of trait associations. A gradual increase in Euclidean distances among these ecotypes was observed as their collection sites moved from marginal to peripheral, and then to central regions of the species' distributional range in Jordan.

scholarly journals Distribution and haplotype diversity of WKS resistance genes in wild emmer wheat natural populations

2016 ◽  
Vol 129 (5) ◽  
pp. 921-934 ◽  
Author(s):  
Lin Huang ◽  
Hanan Sela ◽  
Lihua Feng ◽  
Qijiao Chen ◽  
Tamar Krugman ◽  
...  
Keyword(s):  
Resistance Genes ◽  
Haplotype Diversity ◽  
Natural Populations ◽  
Wild Emmer Wheat ◽  
Emmer Wheat ◽  
Wild Emmer

WILD EMMER WHEAT IN JORDAN: III. A CORE COLLECTION

1997 ◽  
Vol 45 (1) ◽  
pp. 45-51
Author(s):  
A.A. Jaradat
Keyword(s):  
Core Collection ◽  
Phenotypic Diversity ◽  
Diversity Index ◽  
Triticum Dicoccoides ◽  
Sampling Procedure ◽  
Wild Emmer Wheat ◽  
Emmer Wheat ◽  
Wild Emmer ◽  
Multivariate Statistical ◽  
Percent Contribution

The germplasm base collection (BC) of wild emmer wheat,Triticum dicoccoides, from Jordan consists of over 2,000 accessions. Data on 10 quantitative and 8 qualitative traits were analyzed using multivariate statistical analysis procedures. A stratified and proportional sampling procedure was used to select 10 and 5% of the BC to form two core collections: CC10 and CC5, respectively. Phenotypic variation in the BC, as estimated by the phenotypic diversity index, hs,j, was unevenly distributed among accessions, among populations, and among ecogeographical regions. Moreover, its level differed significantly among and within quantitatively and qualitatively inherited traits. This characteristic led to successfully selecting a core collection which represents all levels of hierarchy in the base collection. Examination of the data for the same 18 traits in the BC, CC10, and CC5 indicated that CC10 and CC5 retained, on average, 86.0 and 74.3% of the variation in the BC, respectively. Percent discrete phenotypic classes, with frequency >0.10 (i.e., common widespread and common localized phenotypes). recovered in CC10 and CC5 were 79.6 and 51.5%, respectively. Results of hierarchical analyses of variance showed that percent contribution by traits to total variance in hs,j. estimates increased from 64.0% in the BC to 78.0% in CC10, and to 96.3% in CC5. Nevertheless, and as theoretically expected, CC10 was more efficient than CC5 in retaining the amount and composition of the variation originally found in the base collection.

Repetitive DNAs of wild emmer wheat (Triticum dicoccoides) and their relation to S-genome species: molecular cytogenetic analysis

Genome ◽  
2002 ◽  
Vol 45 (2) ◽  
pp. 391-401 ◽  
Author(s):  
Olga Raskina ◽  
Alexander Belyayev ◽  
Eviatar Nevo
Keyword(s):  
Repetitive Dna ◽  
Triticum Dicoccoides ◽  
Wild Emmer Wheat ◽  
Emmer Wheat ◽  
Wild Emmer ◽  
Banding Technique ◽  
Banding Patterns ◽  
Genome Species ◽  
B Genome ◽  
Copia Retrotransposons

We have analyzed the chromosomal GISH molecular banding patterns of three populations of the wild allopolyploid wheat Triticum dicoccoides in an attempt to unravel the evolutionary relationships between highly repetitive DNA fractions of T. dicoccoides and proposed diploid progenitors of the B genome. Aegilops speltoides showed almost complete affinity of its repetitive DNA to C-heterochromatin of T. dicoccoides, whereas other S-genome species demonstrated relatedness only to distal heterochromatin. This substantiates the priority of Ae. speltoides as the most similar to the wheat B-genome donor in comparison with other Sitopsis species. Using molecular banding technique with DNA of different Aegilops species as a probe permits tracing of the origin of each heterochromatin cluster. Molecular banding analysis reveals polymorphism between three wild emmer wheat populations. Comparison of molecular banding patterns with chromosomal distribution of the Ty1-copia retrotransposons, which constitute a large share of T. dicoccoides genome, makes it possible to propose that the activity of transposable elements may lie in the background of observed intraspecific polymorphism.Key words: Aegilops, evolution, heterochromatin, Ty1-copia retrotransposons, Triticum.

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