Inheritance of the branching in hybrid populations among tetraploid wheat species and the new branched spike line 166-Schakheli

2011 ◽  
Vol 58 (5) ◽  
pp. 621-628 ◽  
Author(s):  
Aybeniz Javad Aliyeva ◽  
Naib Khaliq Aminov
Keyword(s):  
Tetraploid Wheat ◽  
Wheat Species ◽  
Branched Spike

scholarly journals The Independent Domestication of Timopheev’s Wheat: Insights from Haplotype Analysis of the Brittle rachis 1 (BTR1-A) Gene

Genes ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 338
Author(s):  
Moran Nave ◽  
Mihriban Taş ◽  
John Raupp ◽  
Vijay K. Tiwari ◽  
Hakan Ozkan ◽  
...  
Keyword(s):  
Promoter Region ◽  
Haplotype Analysis ◽  
Common Ancestor ◽  
Triticum Turgidum ◽  
Tetraploid Wheat ◽  
Wheat Species ◽  
Loss Of Function ◽  
Brittle Rachis ◽  
Gene Level ◽  
Large Panel

Triticum turgidum and T. timopheevii are two tetraploid wheat species sharing T. urartu as a common ancestor, and domesticated accessions from both of these allopolyploids exhibit nonbrittle rachis (i.e., nonshattering spikes). We previously described the loss-of-function mutations in the Brittle Rachis 1 genes BTR1-A and BTR1-B in the A and B subgenomes, respectively, that are responsible for this most visible domestication trait in T. turgidum. Resequencing of a large panel of wild and domesticated T. turgidum accessions subsequently led to the identification of the two progenitor haplotypes of the btr1-A and btr1-B domesticated alleles. Here, we extended the haplotype analysis to other T. turgidum subspecies and to the BTR1 homologues in the related T. timopheevii species. Our results showed that all the domesticated wheat subspecies within T. turgidum share common BTR1-A and BTR1-B haplotypes, confirming their common origin. In T. timopheevii, however, we identified a novel loss-of-function btr1-A allele underlying a partially brittle spike phenotype. This novel recessive allele appeared fixed within the pool of domesticated Timopheev’s wheat but was also carried by one wild timopheevii accession exhibiting partial brittleness. The promoter region for BTR1-B could not be amplified in any T. timopheevii accessions with any T. turgidum primer combination, exemplifying the gene-level distance between the two species. Altogether, our results support the concept of independent domestication processes for the two polyploid, wheat-related species.

Tetraploid wheat species Triticum timopheevii and Triticum militinae in common wheat improvement

2002 ◽  
Vol 50 (4) ◽  
pp. 463-477 ◽  
Author(s):  
K Järve ◽  
I. Jakobson ◽  
T. Enno
Keyword(s):  
Disease Resistance ◽  
Common Wheat ◽  
Tetraploid Wheat ◽  
Introgressive Hybridization ◽  
Fungal Diseases ◽  
Triticum Timopheevii ◽  
Wheat Species ◽  
Major Genes ◽  
Wheat Improvement ◽  
Unknown Species

Timopheevii wheats are discussed as donors for improving the disease resistance of common wheat. Attention is paid to the comparison of the morphological and chromosomal characteristics of Triticum timopheevii and T. militinae, their crossability with T. aestivum and their response to fungal diseases. The possible origin of T. militinae from an introgressive hybridization between T. timopheevii and an unknown species is discussed. Major genes for resistance to various fungal diseases, transferred to common wheat from T. timopheevii, are listed.

scholarly journals Analysis of gliadin patterns and diversity in Triticum polonicum L. accessions from Ethiopia

2021 ◽  
Vol 117 (1) ◽  
pp. 1
Author(s):  
Eleni SHIFERAW
Keyword(s):  
Genetic Diversity ◽  
Gel Electrophoresis ◽  
Polyacrylamide Gel Electrophoresis ◽  
Tetraploid Wheat ◽  
Genetic Distances ◽  
Wheat Species ◽  
Triticum Polonicum ◽  
Wheat Improvement ◽  
Polymorphic Bands ◽  
Gliadin Patterns

<p>Gliadins from 25 accessions represented by 350 individual seed samples were analysed by acid-polyacrylamide gel electrophoresis (A-PAGE) with the objective of identifying gliadin band patterns and examine the extent of diversity in <em>Triticum polonicum </em>L. collections from Ethiopia. Seventy polymorphic bands and 68 different patterns were identified. Eighteen different mobility bands and 16 patterns were identified in <em>ω</em>-gliadin region, 22 bands and 20 patterns in <em>γ-</em>gliadin region, 12 bands and 22 patterns in <em>β-</em>gliadin region and 18 bands and 10 patterns in <em>α</em>-gliadin region. The average genetic diversity calculated from the data of the four gliadin zones of the analysed samples was 0.15. The γ region have the highest diversity (H = 0.193), followed by ω regions (H = 0.177) and β region (H = 0.168) and the lowest diversity was observed in α region (H = 0.127). Cluster analysis based on genetic distances resulted in grouping of the analysed accessions in to seven main groups. Though the level of diversity was relatively lower than other tetraploid wheat species from Ethiopia, the findings are indicative of the existence of variation in the collections which can be exploited for wheat improvement.</p>

scholarly journals Features of chromosome behavior in meiosis in the common wheat lines containing genetic material of tetraploid wheat species

2015 ◽  
Vol 13 (1) ◽  
pp. 16 ◽  
Author(s):  
Ol’ga Aleksandrovna Orlovskaya ◽  
Irina Nikolaevna Leonova ◽  
Elena Artemovna Salina ◽  
Lyubov’ Vladimirovna Khotyleva
Keyword(s):  
Common Wheat ◽  
Genetic Material ◽  
Tetraploid Wheat ◽  
Wheat Species ◽  
Chromosome Behavior ◽  
The Common ◽  
Wheat Lines

Inheritance of supernumerary spikelets in a tetraploid wheat cross

Genome ◽  
1990 ◽  
Vol 33 (4) ◽  
pp. 509-514 ◽  
Author(s):  
D. L. Klindworth ◽  
N. D. Williams ◽  
L. R. Joppa
Keyword(s):  
Durum Wheat ◽  
Triticum Turgidum ◽  
Major Gene ◽  
Tetraploid Wheat ◽  
Recessive Gene ◽  
Substitution Line ◽  
Minor Genes ◽  
Branched Spike ◽  
Supernumerary Spikelets ◽  
Selection Of

The supernumerary spikelet (SS) trait of durum wheat (Triticum turgidum L.), including the four-rowed and ramified spike types, is characterized by an increased number of spikelets per spike. To determine the inheritance of this trait, the tetraploid ramified spike cultivar PI349056 was crossed reciprocally to normal-spike 'Langdon' durum, and the F1 was backcrossed to each parent. The F1, F2, F3, BC1F1, and BC1F2 were classified for SS expression. Additionally, PI349056 was crossed to the 'Langdon' 2D(2A) disomic substitution line to study linkage of SS genes. The SS trait was recessive to normal spike, and both four-rowed spike and ramified spike progeny were observed in the segregating generations. Segregation in F3 and BC1F2 families indicated that SS in PI349056 was quantitatively inherited, controlled by a major recessive gene and numerous minor genes. Normal-spiked plants selected in families homozygous for the major gene indicated that the major gene did not produce SS when the minor genes were absent. Selection of normal-spiked plants in the F3 and F4 of 'Langdon' 2D(2A) disomic substitution/PI349056 indicated that the minor SS genes were not linked to the major gene on chromosome 2A.Key words: Triticum, branched spike, ramified spike, four-rowed spike.

scholarly journals VRN1 genes variability in tetraploid wheat species with a spring growth habit

2016 ◽  
Vol 16 (S3) ◽  
Author(s):  
Irina Konopatskaia ◽  
Valeriya Vavilova ◽  
Elena Ya. Kondratenko ◽  
Alexandr Blinov ◽  
Nikolay P. Goncharov
Keyword(s):  
Growth Habit ◽  
Tetraploid Wheat ◽  
Wheat Species ◽  
Spring Growth Habit

scholarly journals Tetraploid Wheats: Valuable Source of Phytosterols and Phytostanols

Agronomy ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 201 ◽  
Author(s):  
Othmane Merah ◽  
Zephirin Mouloungui
Keyword(s):  
Tetraploid Wheat ◽  
Grain Filling ◽  
Mean Value ◽  
Climatic Conditions ◽  
Tetraploid Species ◽  
Wheat Species ◽  
Large Variability ◽  
Year Effect ◽  
Flame Ionisation Detector ◽  
Ionisation Detector

Phytosterols are known as healthy compounds obtained mainly from oilseed crops. Cereals were also studied for their sterols content. Few insights have been devoted to other tetraploid species than emmer and durum wheats. This work examined phytosterol and phytostanol content in seed of six tetraploid wheat species cultivated during two successive years under rainfed organic conditions in Auch (near Toulouse, France). Sterols (free and esterified sterols) were measured by gas-chromatography-flame ionisation detector. Mean value of sterols + stanols content was 99.5 mg 100 g−1 DW. The main sterol was β-sitosterol. Results showed a year effect on sterol content, whatever the wheat species. This could be explained by the differences in climatic conditions prevailing during plant cycle and grain filling. A large variability for sterols content was found between species and within each species. Emmer wheat revealed the lowest values for all sterols and stanols. Higher values of sterols were obtained in durum wheat. This work is the first report studying T. carthlicum, T. polonicum, T. turgidum, T. timopheevi. These species exhibited intermediate values of sterol contents between emmer and durum wheats. Wheat tetraploid species showed interesting levels of sterols and could serve as a great source of these healthy compounds mainly in Mediterranean region where they are consumed as wholegrain. Variation in climatic conditions could help to manage the level of these secondary metabolites.

A DNA fingerprinting-based taxonomic allocation of Kamut wheat

2006 ◽  
Vol 4 (3) ◽  
pp. 172-180 ◽  
Author(s):  
Elena K. Khlestkina ◽  
Marion S. Röder ◽  
Heinrich Grausgruber ◽  
Andreas Börner
Keyword(s):  
Polymorphic Information Content ◽  
Tetraploid Wheat ◽  
Diversity Analysis ◽  
Natural Hybrid ◽  
Wheat Species ◽  
Microsatellite Genotyping ◽  
B Genome ◽  
Triticum Polonicum ◽  
Fertile Crescent ◽  
Seed Admixture

AbstractKamut wheat, said to have been derived from seed found in the Egyptian pyramids, appeared on the market about 25 years ago. We have investigated its taxonomic placement using microsatellite genotyping. In all, 89 accessions of 13 tetraploid wheat species, along with samples of Kamut wheat, were genotyped using two A and B genome wheat microsatellite markers per chromosome, generating 453 alleles (8–33 alleles per locus), and a mean allelic polymorphic information content (PIC) of 0.80. A diversity analysis showed that nine major accession groups could be defined, and these were inconsistent with formal taxonomic classifications of about 10% of the material. Most of these misclassifications are due to either species introgression or seed admixture. Some accessions appear to be duplicates. The Kamut wheats grouped together in a cluster containing three accessions of Triticum polonicum and three of T. durum, originating from Turkey, Iraq, Iran and Israel. We suggest that Kamut perhaps derived from a natural hybrid between T. durum and T. polonicum, which occurred in the Fertile Crescent.

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