scholarly journals The determination of the resistance inheritance against common bunt in wheat and half-diallel hybrids

2019 ◽  
Vol 55 (No. 4) ◽  
pp. 254-260
Author(s):  
Gülçin Akgören Palabiyik ◽  
İsmail Poyraz ◽  
Ahmet Umay
Keyword(s):  
Disease Resistance ◽  
Bread Wheat ◽  
Resistance Genes ◽  
Common Bunt ◽  
Wheat Varieties ◽  
Complete Dominance ◽  
Selection For ◽  
Half Diallel ◽  
Dominant Genes

This study was conducted to determine the inheritance of common bunt resistance in twelve bread wheat varieties and their half-diallel hybrids in Turkey. The disease ratings were performed on the F2 generations of the hybrids in field conditions. The obtained data were analysed by the χ2 test to determine the effective gene numbers and inheritance type in the disease resistance. In addition, the data were evaluated according to the Jinks-Hayman diallel analyses. In conclusion, it was found that of the twelve wheat parents, four contained three resistance genes and four of them contain two resistance genes. The dominant genes were prominent in the population and complete dominance was present. Therefore, the selection for disease resistance should be delayed until the following generations.

scholarly journals PRELIMNARY RESULTS ON MARKER ASSISTED SELECTION FOR DISEASE RESISTANCE IN COMMON WHEAT (TRITICUM AESTIVUM)

1970 ◽  
Vol 62 ◽  
Author(s):  
C. Botez ◽  
Monica Iuoraş ◽  
P. Raica ◽  
N. N. Saulescu
Keyword(s):  
Triticum Aestivum ◽  
Disease Resistance ◽  
Bread Wheat ◽  
Ssr Markers ◽  
Resistance Genes ◽  
Marker Assisted Selection ◽  
Rapd Markers ◽  
Issr Markers ◽  
Resistant Lines ◽  
Selection For

Our attempts to find RAPD markers linked with resistance genes to Septoria and Tilletia relying on co-segregation and to test the SSR markers, identified in literature, in order to select bread wheat resistant to Septoria and Tilletia are presented. Several candidate RAPD markers possibly linked with Septoria resistance genes and fewer linked with Tilletia resistance genes were identified. Some RAPD and SSR markers were specific for some resistant lines. These markers, probably, marked different resistance genes in different lines. It seems that some Septoria resistance genes came from rye genome because these genes were marked with some primers specific for rye genome. We found segregation for these markers in several lines, indicating that the analyzed lines were not completely stabilized. The ISSR markers used could not discriminate the resistant from susceptible genotypes to Septoria and Tilletia.

Effectiveness of major resistance genes and identification of new sources for disease resistance in wheat

2011 ◽  
Vol 59 (3) ◽  
pp. 241-248 ◽  
Author(s):  
G. Vida ◽  
M. Cséplő ◽  
G. Gulyás ◽  
I. Karsai ◽  
T. Kiss ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Powdery Mildew ◽  
Leaf Rust ◽  
Resistance Genes ◽  
Rust Resistance ◽  
Genetic Material ◽  
Leaf Rust Resistance ◽  
Wheat Varieties ◽  
Major Resistance Genes ◽  
Greenhouse Tests

Among the factors which determine yield reliability an important role is played by disease resistance. One of the breeding aims in the Martonvásár institute is to develop wheat varieties with resistance to major diseases. The winter wheat varieties bred in Martonvásár are examined in artificially inoculated nurseries and greenhouses for resistance to economically important pathogens. The effectiveness of designated genes for resistance to powdery mildew and leaf rust has been monitored over a period of several decades. None of the designated major resistance genes examined in greenhouse tests is able to provide complete resistance to powdery mildew; however, a number of leaf rust resistance genes provide full protection against pathogen attack (Lr9, Lr19, Lr24, Lr25, Lr28 and Lr35). In the course of marker-assisted selection, efficient resistance genes (Lr9, Lr24, Lr25 and Lr29) have been incorporated into Martonvásár wheat varieties. The presence of Lr1, Lr10, Lr26, Lr34 and Lr37 in the Martonvásár gene pool was identified using molecular markers. New sources carrying alien genetic material have been tested for powdery mildew and leaf rust resistance. Valuable Fusarium head blight resistance sources have been identified in populations of old Hungarian wheat varieties. Species causing leaf spots (Pyrenophora tritici-repentis, Septoria tritici and Stagonospora nodorum) have gradually become more frequent over the last two decades. Tests on the resistance of the host plant were begun in Martonvásár four years ago and regular greenhouse tests on seedlings have also been initiated.

scholarly journals Map-based isolation of disease resistance genes from bread wheat: cloning in a supersize genome

2005 ◽  
Vol 85 (2) ◽  
pp. 93-100 ◽  
Author(s):  
BEAT KELLER ◽  
CATHERINE FEUILLET ◽  
NABILA YAHIAOUI
Keyword(s):  
Disease Resistance ◽  
Powdery Mildew ◽  
Leaf Rust ◽  
Bread Wheat ◽  
Genetic Map ◽  
Resistance Genes ◽  
Positional Cloning ◽  
Repetitive Sequences ◽  
Near Future ◽  
Genome Projects

The genome of bread wheat is hexaploid and contains 1·6×1010 bp of DNA, of which more than 80% is repetitive sequences. Its size and complexity represent a challenge for the isolation of agronomically important genes, for which we frequently know only their position on the genetic map. Recently, new genomic resources and databases from genome projects have simplified the molecular analysis of the wheat genome. The first genes to be isolated from wheat by map-based cloning include three resistance genes against the fungal diseases powdery mildew and leaf rust. In this review, we will describe the approaches and resources that have contributed to this progress, and discuss genomic strategies that will simplify positional cloning in wheat in the near future.

scholarly journals Determination of the Rheological Properties of Red and White Bread Wheat Flours with Different Methods

2020 ◽  
Author(s):  
Pelin Dölek Ekinci ◽  
Incilay Gökbulut
Keyword(s):  
Rheological Properties ◽  
Bread Wheat ◽  
Wheat Flour ◽  
White Bread ◽  
Wheat Varieties ◽  
Flour Dough ◽  
Wheat Flour Dough ◽  
Wheat Flours ◽  
Average Development

In this study, rheological properties of the bread wheat flour dough from 6 wheat genotypes were determined. For the pereparation of flour, 3 red bread (Pandas, Sagitorya, Pehlivan) and 3 white bread (Kaşifbey, Göktan, Ceyhan-99) were selected as wheat genotype. To determine the rheological properties of the wheat flour dough, farinograph, extensograph, mixolab and glutograph devices were used. According to the results of the Farinograph analysis, the average development time of wheat White and red genotypes were 1.95 minutes and 8.96 minutes, respectively. According to the extensograph results of the flour samples, the most extended stability value was determined with 7.47 min in Ceyhan-99 cultivar. As a result of the research, it was determined that flour yields of red bread varieties were higher other genotypes, gas retention capacities of white bread flours were showed high result in extensograph application and resistance of dough to elongation was higher. In the Mixolab analysis, it determined that white bread wheat varieties have higher values in terms of kneading properties and gluten properties, and red bread wheat varieties have higher values in values of viscosity, amylase value and starch retrogradation.

Identification of resistance genes to Puccinia striiformis in seedlings of Ethiopian and CIMMYT bread wheat varieties and lines

1990 ◽  
Vol 96 (4) ◽  
pp. 199-210 ◽  
Author(s):  
Ayele Badebo ◽  
Ron W. Stubbs ◽  
Maarten Ginkel ◽  
Getinet Gebeyehu
Keyword(s):  
Bread Wheat ◽  
Resistance Genes ◽  
Puccinia Striiformis ◽  
Wheat Varieties

scholarly journals Drought and heat tolerance of bread wheat varieties on rainfe

2021 ◽  
pp. 60-62
Author(s):  
Zafar A. Ochilov ◽  
Мarina N. Pokrovskaya
Keyword(s):  
Bread Wheat ◽  
Common Wheat ◽  
Heat Tolerance ◽  
Scientific Center ◽  
Wheat Varieties ◽  
Experimental Station ◽  
Dry Conditions ◽  
New Varieties ◽  
Selection For ◽  
Leguminous Crops

Relevance and methods. The article presents the results of studied the drought and heat tolerance of bread wheat varieties on rainfed. The aim of the research is to study new varieties of common wheat obtained from the international scientific center ICARDA with high drought and heat resistance, in dry conditions and selection for further breeding work. The material of our research was 116 varieties of the international scientific center ICARDA of soft wheat. Research was carried out on bogar in the laboratory of selection and seed production of common wheat of the Gallyaral Scientific Experimental Station of the Research Institute of Grain and Leguminous Crops.Results. It selected 6 varieties of high drought and heat tolerance of bread wheat on rainfed.

The role of minimum disease resistance standards for the control of cereal diseases

2007 ◽  
Vol 58 (6) ◽  
pp. 588 ◽  
Author(s):  
Hugh Wallwork
Keyword(s):  
Disease Resistance ◽  
Resistance Genes ◽  
Rust Resistance ◽  
Historical Background ◽  
Wheat Varieties ◽  
Cereal Diseases ◽  
The Way

A set of Minimum Disease resistance Standards (MDS) has been developed for rust resistance in new wheat varieties in Australia. These standards aim to provide protection to growers from varieties that produce large amounts of inoculum and, more specifically, protect the usefulness of resistance genes by reducing the probability of new pathotypes evolving with virulences that can overcome them. This paper provides a historical background to the establishment of MDS in Australia, the rationale for its introduction and the appropriateness of different resistance scales, problems that have been encountered, and the way forward to fully implement MDS. A brief consideration is also given as to which other wheat and barley diseases MDS may usefully be applied to.

Sign in / Sign up

Export Citation Format

Share Document