Karyotypic analysis of two durum wheat varieties

1985 ◽  
Vol 27 (5) ◽  
pp. 617-621 ◽  
Author(s):  
P. J. Bebeli ◽  
P. J. Kaltsikes
Keyword(s):  
Durum Wheat ◽  
Key Words ◽  
Secondary Constriction ◽  
Triticum Turgidum ◽  
Giemsa Banding ◽  
Wheat Varieties ◽  
Karyotypic Analysis ◽  
C Banding ◽  
Chromosome 5B ◽  
Terminal Band

The karyotypes of 'Capeiti' and 'Mexicali', two durum wheat (Triticum turgidum L. var. durum) cultivars were constructed on the basis of the Giemsa banding of their chromosomes. No major differences were noted. Minor differences were as follows: chromosome 4B of 'Mexicali' has more heterochromatin than its counterpart in 'Capeiti', and chromosome 5B in 'Capeiti' has a terminal band on its long arm that is lacking in 'Mexicali', while the opposite is true for the long arm of 6B. In 'Mexicali' 6BS there is a wider band next to the secondary constriction than in 'Capeiti'.Key words: durum wheat, karyotype, C-banding, heterochromatin.

Plenty Durum wheat

1991 ◽  
Vol 71 (2) ◽  
pp. 501-503 ◽  
Author(s):  
D. R. Knott
Keyword(s):  
Disease Resistance ◽  
Durum Wheat ◽  
Key Words ◽  
Triticum Turgidum ◽  
Wheat Cultivar ◽  
Durum Wheat Cultivar ◽  
Cultivar Description

Plenty durum wheat (Triticum turgidum L.) is a high-yielding, moderately late durum wheat that is eligible for the top grades of amber durum wheat. It has moderately tall, strong straw and is well-adapted to the drier areas of durum production. It is similar to other durum cultivars in disease resistance. Key words: Triticum turgidum, durum wheat, cultivar description

Cytogenetic identification of Triticum peregrinum chromosomes added to common wheat

Genome ◽  
1996 ◽  
Vol 39 (2) ◽  
pp. 272-276 ◽  
Author(s):  
B. Friebe ◽  
E. D. Badaeva ◽  
B. S. Gill ◽  
N. A. Tuleen
Keyword(s):  
Triticum Aestivum ◽  
Key Words ◽  
Common Wheat ◽  
Addition Lines ◽  
Karyotypic Analysis ◽  
Chromosome Addition ◽  
C Banding ◽  
Chromosome Addition Lines ◽  
Complete Set ◽  
Donor Species

C-banded karyotypes of a complete set of 14 Triticum peregrinum whole chromosome addition lines and 25 telosomic addition lines are reported. The added T. peregrinum chromosomes were not structurally rearranged compared with the corresponding chromosomes of the donor accession. Comprehensive karyotypic analysis confirmed Triticum umbellulatum as the donor species of the Uv genome and identified Triticum longissimum as the donor species of the Sv genome of T. peregrinum. Neither the Uv nor Sv genome chromosomes of the T. peregrinum accession showed large modifications when compared with the ancestral U and S1 genomes. Key words : Triticum aestivum, Triticum peregrinum, Triticum umbellulatum, Triticum longissimum, chromosome addition lines, C-banding.

Effect of zinc on cadmium concentration in the tissue of durum wheat

1994 ◽  
Vol 74 (3) ◽  
pp. 549-552 ◽  
Author(s):  
M. Choudhary ◽  
L D. Bailey ◽  
C. A. Grant
Keyword(s):  
Ammonium Nitrate ◽  
Durum Wheat ◽  
Key Words ◽  
Triticum Turgidum ◽  
Cadmium Concentration ◽  
Growth Chamber ◽  
Monoammonium Phosphate ◽  
Chamber Study ◽  
Soil Temperatures

The addition of zinc at 20 mg kg−1 to soils in a growth chamber study reduced the shoot Cd concentration of two durum wheat (Triticum turgidum L. var durum) lines at 10 °C, 16 °C, and 22 °C soil temperatures while additions of ammonium nitrate (NH4NO3) and monoammonium phosphate (NH4H2PO4) increased shoot Cd concentrations. Applying Zn with NH4NO3 or NH4H2PO4 reduced shoot Cd concentrations of the plants to levels comparable to the control. Key words: Cd, durum wheat, ammonium nitrate, monoammonium phosphate, Zn

scholarly journals Karyotypic Study of seven Types of Impatiens balsamina L.

1970 ◽  
Vol 15 ◽  
pp. 147-152 ◽  
Author(s):  
USN Momtaz ◽  
G Kabir ◽  
MM Ud-deen ◽  
N Yasmin
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Secondary Constriction ◽  
Karyotype Analysis ◽  
Diploid Chromosome Number ◽  
Interphase Chromosome ◽  
Karyotypic Analysis ◽  
Total Frequency ◽  
Impatiens Balsamina ◽  
Karyotypic Study

Nuclear phenotype and chromosome characteristics of eight types of Impatiens balsamina L. were studied. The diploid chromosome number was found to be 2n=14 in all types of Impatiens balsamina. Interphase chromosome volume was found to range from 0.1665μ3 (violet type) to 0.3904 μ3 (red type). The maximum total chromatin length (24.73μm) was observed in pink type and minimum (11.70μm) in violet type. Maximum total frequency percent (50.00%) was found in both foreign types (red and violet) and minimum (48.03%) in violet type. The karyotype analysis revealed that there was no secondary constriction and sub-terminal chromosome in any of the seven types belonging to Impatiens balsamina. So, on the basis of karyotypic analysis the present findings indicated that all the types of Impatiens balsamina were of primitive nature. Key words: Karyotype, Nuclear phenotype, Impatiens balsamina L.   doi: 10.3329/jbs.v15i0.2155    J. bio-sci. 15: 147-152, 2007

The transfer of stem rust resistance from the Ethiopian durum wheat St. 464 to common wheat

1996 ◽  
Vol 76 (2) ◽  
pp. 317-319 ◽  
Author(s):  
D. R. Knott
Keyword(s):  
Triticum Aestivum ◽  
Durum Wheat ◽  
Key Words ◽  
Common Wheat ◽  
Stem Rust ◽  
Rust Resistance ◽  
Triticum Turgidum ◽  
Stem Rust Resistance ◽  
Puccinia Graminis ◽  
Monosomic Analysis

Two genes for stem rust (Puccinia graminis Pers. f. sp. tritici Eriks. & Henn.) resistance were transferred from the Ethiopian durum wheat (Triticum turgidum L) accession St. 464 to Thatcher and Prelude/8* Marquis common wheat. One gene was shown by monosomic analysis to be on chromosome 4B and proved to be Sr7a. Monosomic analysis failed to locate the second gene. It is only partially dominant and conditions resistance to a range of races. Key words: Rust resistance, stem rust, wheat, Puccinia graminis tritici, Triticum aestivum, Triticum turgidum

Structural and functional characterisation of two novel durum wheat annexin genes in response to abiotic stress

2018 ◽  
Vol 45 (5) ◽  
pp. 542 ◽  
Author(s):  
Marwa Harbaoui ◽  
Rania Ben Saad ◽  
Nihed Ben Halima ◽  
Mouna Choura ◽  
Faiçal Brini
Keyword(s):  
Abiotic Stress ◽  
Durum Wheat ◽  
Stress Responses ◽  
Triticum Turgidum ◽  
Expression Patterns ◽  
Redox Homeostasis ◽  
Heavy Metal Stress ◽  
Active Role ◽  
Crop Productivity ◽  
Wheat Varieties

Abiotic stress results in massive loss of crop productivity throughout the world. Understanding the plant gene regulatory mechanisms involved in stress responses is very important. Annexins are a conserved multigene family of Ca-dependent, phospholipid-binding proteins with suggested functions in response to environmental stresses and signalling during plant growth and development. Annexins function to counteract oxidative stress, maintain cell redox homeostasis and enhance drought tolerance. A full-length cDNA of two genes (TdAnn6 and TdAnn12) encoding annexin proteins were isolated and characterised from Tunisian durum wheat varieties (Triticum turgidum L. subsp. durum cv. Mahmoudi). Analyses of the deduced proteins encoded by annexin cDNAs (TdAnn6 and TdAnn12) indicate the presence of the characteristic four repeats of 70–75 amino acids and the motifs proposed to be involved in Ca2+ binding. Gene expression patterns obtained by real-time PCR revealed differential temporal and spatial regulation of the two annexin genes in durum wheat under different abiotic stress conditions such as salt (NaCl 150 mM), osmotic (10% polyethylene glycol 8000), ionic (LiCl 10 mM), oxidative (H2O2), ABA (100 µM), salicylic acid (10 mM), cold (4°C) and heat (37°C) stress. The two annexin genes were not regulated by heavy metal stress (CdCl2 150 µM). Moreover, heterologous expression of TdAnn6 and TdAnn12 in yeast improves its tolerance to abiotic stresses, suggesting annexin’s involvement in theses stress tolerance mechanisms. Taken together, our results show that the two newly isolated wheat annexin might play an active role in modulating plant cell responses to abiotic stress responses.

AC Navigator durum wheat

2000 ◽  
Vol 80 (2) ◽  
pp. 343-345 ◽  
Author(s):  
J. M. Clarke ◽  
J. G. McLeod ◽  
R. M. DePauw ◽  
B. A. Marchylo ◽  
T. N. McCaig ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Durum Wheat ◽  
Key Words ◽  
Triticum Turgidum ◽  
Wheat Cultivar ◽  
High Yield ◽  
Canadian Prairies ◽  
Durum Wheat Cultivar ◽  
Brown Soil ◽  
Cultivar Description

AC Navigator durum wheat is adapted to the Brown and Dark Brown soil zones of the Canadian prairies. It combines high yield with strong gluten properties. It is a semidwarf with shorter straw than all other registered cultivars in Canada, and has similar maturity to Kyle. Key words: Triticum turgidum L. var durum, durum wheat, cultivar description, yield, protein, disease resistance

The chromosomal location of a gene (msg) affecting megasporogenesis in durum wheat

Genome ◽  
1987 ◽  
Vol 29 (4) ◽  
pp. 578-581 ◽  
Author(s):  
L. R. Joppa ◽  
N. D. Williams ◽  
S. S. Maan
Keyword(s):  
Durum Wheat ◽  
Key Words ◽  
Chromosomal Location ◽  
Triticum Turgidum ◽  
Wheat Line ◽  
Pollen Mother Cells ◽  
Chromosome Arm ◽  
Pollen Nucleus ◽  
Mother Cells ◽  
Metaphase I

An aneuploid durum wheat line (Triticum turgidum L. var. durum) having 13 chromosome pairs and 2 unpaired chromosomes at metaphase I of meiosis in pollen mother cells (i.e., monosomic for chromosomes 7A and 7D) was observed to produce some progeny plants with 2n = 40 chromosomes. These aneuploid (triploid) plants were usually weak and sterile. Triploid plants also occurred in the progeny of durum plants monosomic for chromosome 7A, or in progeny of plants that were mono-telodisomic or ditelomonotelosomic for chromosome 7Aq (13 II + 1 t II or 13 II + t II + t I) but not in the progeny of plants ditelomonotelosomic for chromosome 7Ap (13 II + t II + t 1). Therefore, there is a gene(s) on chromosome arm 7Ap that prevents the production of diploid (2n) egg cells in wheat. In the absence of 7Ap, a portion of the egg cells have 26 chromosomes, which when fertilized with a pollen nucleus with 14 chromosomes, produces progeny plants with 2n = 40 chromosomes. The data also indicated that chromosome arm 7Dp probably contains a second gene that is capable of preventing the production of triploid plants. Key words: Triticum turgidum L. var. durum, polyploidy, aneuploid, triploid, monosomic.

scholarly journals Development of a new wheat microarray from a durum wheat totipotent cDNA library used for a powdery mildew resistance study

2013 ◽  
Vol 18 (2) ◽  
Author(s):  
Rosa Cifarelli ◽  
Olimpia D’Onofrio ◽  
Rosalba Grillo ◽  
Teresa Mango ◽  
Francesco Cellini ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Durum Wheat ◽  
Cdna Library ◽  
Triticum Turgidum ◽  
Cdna Libraries ◽  
Chromosome 5B ◽  
A Genome ◽  
Gene Expression Studies ◽  
Wheat Lines ◽  
Six Genes

AbstractTotipotent cDNA libraries representative of all the potentially expressed sequences in a genome would be of great benefit to gene expression studies. Here, we report on an innovative method for creating such a library for durum wheat (Triticum turgidum L. var. durum) and its application for gene discovery. The use of suitable quantities of 5-azacytidine during the germination phase induced the demethylation of total DNA, and the resulting seedlings potentially express all of the genes present in the genome. A new wheat microarray consisting of 4925 unigenes was developed from the totipotent cDNA library and used to screen for genes that may contribute to differences in the disease resistance of two near-isogenic lines, the durum wheat cultivar Latino and the line 5BIL-42, which are respectively susceptible and resistant to powdery mildew. Fluorescently labeled cDNA was prepared from the RNA of seedlings of the two near-isogenic wheat lines after infection with a single powdery mildew isolate under controlled conditions in the greenhouse. Hybridization to the microarray identified six genes that were differently expressed in the two lines. Four of the sequences could be assigned putative functions based on their similarity to known genes in public databases. Physical mapping of the six genes localized them to two regions of the genome: the centromeric region of chromosome 5B, where the Pm36 resistance gene was previously localized, and chromosome 6B.

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