scholarly journals Improvement of Yield, Rust Resistance and Grain Quality Characters in Bread Wheat Cross Sids 12 X Misr 3 تحسین صفات المحصول، مقاومة الأصداء وجودة الحبوب فی هجین قمح الخبز سدس 12 × مصر 3

2020 ◽  
Vol 11 (10) ◽  
pp. 1013-1020
Author(s):  
W. Z. E. Farhat ◽  
Eman Mohamed ◽  
M. Ashmawy
Keyword(s):  
Bread Wheat ◽  
Rust Resistance ◽  
Grain Quality ◽  
Wheat Cross

scholarly journals Map-Based Cloning of Leaf Rust Resistance Gene Lr21 From the Large and Polyploid Genome of Bread Wheat

Genetics ◽  
2003 ◽  
Vol 164 (2) ◽  
pp. 655-664 ◽  
Author(s):  
Li Huang ◽  
Steven A Brooks ◽  
Wanlong Li ◽  
John P Fellers ◽  
Harold N Trick ◽  
...  
Keyword(s):  
Amino Acid ◽  
Leaf Rust ◽  
Resistance Gene ◽  
Bread Wheat ◽  
Rust Resistance ◽  
Agronomic Traits ◽  
Leaf Rust Resistance ◽  
Triticum Aestivum L ◽  
Rust Resistance Gene ◽  
Leaf Rust Resistance Gene

Abstract We report the map-based cloning of the leaf rust resistance gene Lr21, previously mapped to a generich region at the distal end of chromosome arm 1DS of bread wheat (Triticum aestivum L.). Molecular cloning of Lr21 was facilitated by diploid/polyploid shuttle mapping strategy. Cloning of Lr21 was confirmed by genetic transformation and by a stably inherited resistance phenotype in transgenic plants. Lr21 spans 4318 bp and encodes a 1080-amino-acid protein containing a conserved nucleotide-binding site (NBS) domain, 13 imperfect leucine-rich repeats (LRRs), and a unique 151-amino-acid sequence missing from known NBS-LRR proteins at the N terminus. Fine-structure genetic analysis at the Lr21 locus detected a noncrossover (recombination without exchange of flanking markers) within a 1415-bp region resulting from either a gene conversion tract of at least 191 bp or a double crossover. The successful map-based cloning approach as demonstrated here now opens the door for cloning of many crop-specific agronomic traits located in the gene-rich regions of bread wheat.

The impact of supply, demand and grain quality on the UK bread and feed wheat price differential in the UK

2006 ◽  
Vol 144 (5) ◽  
pp. 411-419 ◽  
Author(s):  
P. D. HOLLINS ◽  
P. S. KETTLEWELL ◽  
S. T. PARSONS ◽  
M. D. ATKINSON
Keyword(s):  
Statistical Model ◽  
Bread Wheat ◽  
Interannual Variation ◽  
Grain Quality ◽  
Quality Criterion ◽  
Falling Number ◽  
Hypothetical Model ◽  
The Uk ◽  
The Impact ◽  
Hagberg Falling Number

The difference between the bread wheat and feed wheat prices in the UK (the premium) is an important influence on behaviour throughout the entire grain chain. The aim of the present study was to quantify the influence of grain quality and other factors on interannual variation in the premium calculated as a proportion of the feed price. A hypothetical model of the UK wheat economy was devised, appropriate annual national data from 1982 to 2000 were collected for each component and multiple regression was used to develop a statistical model for the premium.The statistical model included livestock numbers (calculated as pig equivalents), Hagberg falling number and wheat stocks, which together explained 0·80 of the interannual variation in the premium. A high premium was associated with high livestock numbers, low Hagberg falling number and low wheat stocks. These variables were included in the hypothetical model because: livestock numbers represent demand for feed wheat; Hagberg falling number is a quality criterion for purchase of bread wheat with a low value indicating poor quality and thus a smaller supply of bread wheat; wheat stocks are one of the sources of supply of wheat. It was concluded that of the 16 supply, demand or price variables in the hypothetical model the main variables associated with the premium from 1982 to 2000 were demand for feed wheat, quality of the wheat harvest and carry-over of wheat from the previous harvest.

scholarly journals Cytogenetic analysis and mapping of leaf rust resistance in Aegilops speltoides Tausch derived bread wheat line Selection2427 carrying putative gametocidal gene(s)

Genome ◽  
2017 ◽  
Vol 60 (12) ◽  
pp. 1076-1085 ◽  
Author(s):  
M. Niranjana ◽  
Vinod ◽  
J.B. Sharma ◽  
Niharika Mallick ◽  
S.M.S. Tomar ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Bread Wheat ◽  
Rust Resistance ◽  
Dominant Gene ◽  
Puccinia Triticina ◽  
Leaf Rust Resistance ◽  
Aegilops Speltoides ◽  
Lr Genes ◽  
Gametocidal Gene ◽  
Chromosome 3B

Leaf rust (Puccinia triticina) is a major biotic stress affecting wheat yields worldwide. Host-plant resistance is the best method for controlling leaf rust. Aegilops speltoides is a good source of resistance against wheat rusts. To date, five Lr genes, Lr28, Lr35, Lr36, Lr47, and Lr51, have been transferred from Ae. speltoides to bread wheat. In Selection2427, a bread wheat introgresed line with Ae. speltoides as the donor parent, a dominant gene for leaf rust resistance was mapped to the long arm of chromosome 3B (LrS2427). None of the Lr genes introgressed from Ae. speltoides have been mapped to chromosome 3B. Since none of the designated seedling leaf rust resistance genes have been located on chromosome 3B, LrS2427 seems to be a novel gene. Selection2427 showed a unique property typical of gametocidal genes, that when crossed to other bread wheat cultivars, the F1 showed partial pollen sterility and poor seed setting, whilst Selection2427 showed reasonable male and female fertility. Accidental co-transfer of gametocidal genes with LrS2427 may have occurred in Selection2427. Though LrS2427 did not show any segregation distortion and assorted independently of putative gametocidal gene(s), its utilization will be difficult due to the selfish behavior of gametocidal genes.

scholarly journals Pyramiding of Genes for Grain Protein Content, Grain Quality and Rust Resistance in Eleven Indian Bread Wheat Cultivars: A Multi-Institutional Effort

2021 ◽  
Author(s):  
Pushpendra K. Gupta ◽  
Harindra S. Balyan ◽  
Parveen Chhuneja ◽  
Jai P. Jaiswal ◽  
Shubhada Tamhankar ◽  
...  
Keyword(s):  
Protein Content ◽  
Rust Resistance ◽  
Grain Quality ◽  
Grain Protein Content ◽  
Grain Protein ◽  
Loaf Volume ◽  
Wheat Cultivars ◽  
Glutenin Subunits ◽  
Hmw Glutenin Subunits ◽  
Hmw Glutenin

Abstract Improvement of grain protein content (GPC), loaf volume and resistance to rusts was achieved in 11 Indian wheat cultivars that are widely grown in four different agro-climatic zones of India. This involved use of marker-assisted backcrossing (MABC) for introgression and pyramiding of the following genes: (i) the high GPC gene Gpc-B1; (ii) HMW glutenin subunits 5 + 10 at Glu-D1 loci, and (iii) rust resistance genes, Yr36, Yr15, Lr24 and Sr24. GPC was improved by 0.8–3.3%, although high GPC was generally associated with yield penalty. Further selection among high GPC lines, allowed development of progenies with higher GPC associated with improvement in 1000-grain weight and grain yield in the following four cultivars: NI5439, UP2338, UP2382 and HUW468. The high GPC progenies (derived from NI5439) were also improved for grain quality using HMW glutenin subunits 5 + 10 at Glu-D1 loci. Similarly, progenies combining high GPC and rust resistance were developed in the backgrounds of following five cultivars: Lok1, HD2967, PBW550, PBW621 and DBW1. The improved pre-bred lines developed during the present study should prove useful for development of cultivars with improved nutritional quality associated with rust resistance in future wheat breeding programmes.

scholarly journals Diversity of Resistance Gene Analogues in Rust Resistance and Susceptible Bread Wheat Varieties

2019 ◽  
Vol 5 (2) ◽  
pp. 29-40
Author(s):  
Faranak Khanmakoo ◽  
Seyed Abolghasem Mohammadi ◽  
Robab Salami ◽  
Saeed Aharizad ◽  
◽  
...  
Keyword(s):  
Resistance Gene ◽  
Bread Wheat ◽  
Rust Resistance ◽  
Wheat Varieties

Transfer of leaf rust and stripe rust resistance from Aegilops umbellulata Zhuk. to bread wheat (Triticum aestivum L.)

2007 ◽  
Vol 55 (6) ◽  
pp. 849-859 ◽  
Author(s):  
Parveen Chhuneja ◽  
Satinder Kaur ◽  
R. K. Goel ◽  
M. Aghaee-Sarbarzeh ◽  
M. Prashar ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Leaf Rust ◽  
Bread Wheat ◽  
Stripe Rust ◽  
Rust Resistance ◽  
Triticum Aestivum L ◽  
Stripe Rust Resistance ◽  
Aegilops Umbellulata

Effect of egg parasitoid density on the population suppression of Sunn Pest, Eurygaster integriceps (Hemiptera: Scutelleridae), and its resulting impact on bread wheat grain quality

2005 ◽  
Vol 79 (2) ◽  
pp. 83-87 ◽  
Author(s):  
Abdul Nasser Trissi ◽  
Mustapha El Bouhssini ◽  
Joumaa Ibrahem ◽  
Mohammed Abdulhai ◽  
Bruce L. Parker ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Grain Quality ◽  
Egg Parasitoid ◽  
Wheat Grain ◽  
Sunn Pest ◽  
Eurygaster Integriceps ◽  
Population Suppression
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