Intra- and inter-population variations in grain protein percentage in wild tetraploid wheat, Triticum turgidum var. dicoccoides

Euphytica ◽  
1989 ◽  
Vol 42 (3) ◽  
pp. 251-258 ◽  
Author(s):  
A. A. Levy ◽  
M. Feldman
Keyword(s):  
Triticum Turgidum ◽  
Tetraploid Wheat ◽  
Grain Protein ◽  
Protein Percentage

Paternal and maternal effects on grain weight and protein percentage in crosses between hexaploid and tetraploid high- and low-protein wheat genotypes

Genome ◽  
1992 ◽  
Vol 35 (2) ◽  
pp. 257-260 ◽  
Author(s):  
E. Millet ◽  
M. Zaccai ◽  
M. Feldman
Keyword(s):  
Ploidy Level ◽  
Maternal Effect ◽  
Triticum Turgidum ◽  
High Protein ◽  
Grain Weight ◽  
Mother Plant ◽  
Interspecific Crosses ◽  
Grain Protein ◽  
Breeding Lines ◽  
Protein Percentage

The inheritance of grain protein percentage and of grain weight were studied by crossing common and durum wheat cultivars with hexaploid and tetraploid breeding lines that excel in grain protein percentage. All high protein lines were descendants of the tetraploid wild emmer Triticum turgidum var. dicoccoides. One hexaploid cultivar was also crossed with a high-protein var. dicoccoides genotype. All crosses were made between low- and high-protein genotypes and were carried out reciprocally for any combination of genotypes; some of them between genotypes of the same ploidy level and some between hexaploid and tetraploid lines. Weight and protein percentage were determined in selfed and crossed grains that developed on the same spike. Mean weight and protein percentage were also determined in F2 grains of all crosses of the same ploidy level, either tetraploid or hexaploid. At any ploidy level, F1 grains resembled the selfed grains of the mother plant both in grain weight and in grain protein percentage, indicating a major maternal effect on both traits. F2 grains had similar grain weight to the heavy-grained parent, and their protein percentage was close to the midparents value. However, a slight indication of cytoplasmic inheritance of grain protein percentage was found in the comparison between most pairs of F2 reciprocals. The interspecific crosses (hexaploid with tetraploid combinations) yielded shrivelled seeds with highly reduced weight but relatively unchanged protein percentage. Weight reduction in the shrivelled hybrid grains (compared with the selfed ones) was more severe when the mother plant was hexaploid rather than tetraploid. The significance of the different tissues in determining grain weight and protein percentage is discussed.Key words: grain weight, grain protein percentage, maternal effect, paternal effect, reciprocal crosses, wheat, Triticum aestivum, Triticum turgidum var. dicoccoides.

scholarly journals Factors Affecting the Storage Grain Protein Content of Tetraploid Wheat (Triticum turgidum L.) and Their Management

2019 ◽  
pp. 1-8
Author(s):  
Anteneh Agezew Melash
Keyword(s):  
Protein Content ◽  
Protein Concentration ◽  
Triticum Turgidum ◽  
Tetraploid Wheat ◽  
Grain Filling ◽  
Sowing Date ◽  
Grain Protein Content ◽  
Grain Protein ◽  
Wheat Grain ◽  
Factors Affecting

This review work aims to evaluate the factors affecting the storage grain protein content of tetraploid Wheat (Triticum turgidum L.) and their management. For commercial production of tetraploid wheat, grain protein content is considered very important. As the grain receive great market attention due to protein premium price paid for farmers, mainly above 13% that will give about 12% of protein in the milled semolina. However, this review state that grain protein content of tetraploid wheat is sensitive to environmental conditions prevailing before and during grain filling, crop genetics and cultural practices. This and associated problems universally call agronomic based alternative solution to ameliorate protein concentration in durum wheat grain. This could be modified through manipulating seeding rates, selection crop varieties, adjusting nitrogen amount and fertilization time and sowing date. The decision of time of nitrogen application however should be made based on the interest of the farmers. If the interest gears towards grain yield, apply nitrogen early in the season and apply the fertilizer later if heading for better protein concentration.

scholarly journals Function and evolution of allelic variation of Sr13 conferring resistance to stem rust in tetraploid wheat ( Triticum turgidum L.)

2021 ◽  
Author(s):  
Baljeet K. Gill ◽  
Daryl L. Klindworth ◽  
Matthew N. Rouse ◽  
Jinglun Zhang ◽  
Qijun Zhang ◽  
...  
Keyword(s):  
Stem Rust ◽  
Triticum Turgidum ◽  
Allelic Variation ◽  
Tetraploid Wheat

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.

Molecular characterization and chromosome-specific TRAP-marker development for Langdon durum D-genome disomic substitution lines

Genome ◽  
2006 ◽  
Vol 49 (12) ◽  
pp. 1545-1554 ◽  
Author(s):  
J. Li ◽  
D.L. Klindworth ◽  
F. Shireen ◽  
X. Cai ◽  
J. Hu ◽  
...  
Keyword(s):  
Triticum Turgidum ◽  
Tetraploid Wheat ◽  
Substitution Lines ◽  
Genome Chromosome ◽  
D Genome ◽  
Single Chromosome ◽  
B Genome ◽  
The Individual ◽  
Trap Marker

The aneuploid stocks of durum wheat ( Triticum turgidum L. subsp. durum (Desf.) Husnot) and common wheat ( T. aestivum L.) have been developed mainly in ‘Langdon’ (LDN) and ‘Chinese Spring’ (CS) cultivars, respectively. The LDN-CS D-genome chromosome disomic substitution (LDN-DS) lines, where a pair of CS D-genome chromosomes substitute for a corresponding homoeologous A- or B-genome chromosome pair of LDN, have been widely used to determine the chromosomal locations of genes in tetraploid wheat. The LDN-DS lines were originally developed by crossing CS nulli-tetrasomics with LDN, followed by 6 backcrosses with LDN. They have subsequently been improved with 5 additional backcrosses with LDN. The objectives of this study were to characterize a set of the 14 most recent LDN-DS lines and to develop chromosome-specific markers, using the newly developed TRAP (target region amplification polymorphism)-marker technique. A total of 307 polymorphic DNA fragments were amplified from LDN and CS, and 302 of them were assigned to individual chromosomes. Most of the markers (95.5%) were present on a single chromosome as chromosome-specific markers, but 4.5% of the markers mapped to 2 or more chromosomes. The number of markers per chromosome varied, from a low of 10 (chromosomes 1A and 6D) to a high of 24 (chromosome 3A). There was an average of 16.6, 16.6, and 15.9 markers per chromosome assigned to the A-, B-, and D-genome chromosomes, respectively, suggesting that TRAP markers were detected at a nearly equal frequency on the 3 genomes. A comparison of the source of the expressed sequence tags (ESTs), used to derive the fixed primers, with the chromosomal location of markers revealed that 15.5% of the TRAP markers were located on the same chromosomes as the ESTs used to generate the fixed primers. A fixed primer designed from an EST mapped on a chromosome or a homoeologous group amplified at least 1 fragment specific to that chromosome or group, suggesting that the fixed primers might generate markers from target regions. TRAP-marker analysis verified the retention of at least 13 pairs of A- or B-genome chromosomes from LDN and 1 pair of D-genome chromosomes from CS in each of the LDN-DS lines. The chromosome-specific markers developed in this study provide an identity for each of the chromosomes, and they will facilitate molecular and genetic characterization of the individual chromosomes, including genetic mapping and gene identification.

Sign in / Sign up

Export Citation Format

Share Document