Genetic Diversity of Bread Wheat under Drought Conditions

2017 ◽  
Vol 1 (2) ◽  
pp. 1-7
Author(s):  
Hadi Ranjbar
Keyword(s):  
Genetic Diversity ◽  
Bread Wheat ◽  
Drought Conditions

scholarly journals Genetic diversity of high and low molecular weight glutenin subunits in Saharan bread and durum wheats from Algerian oases

2012 ◽  
Vol 48 (No. 1) ◽  
pp. 23-32 ◽  
Author(s):  
I. Bellil ◽  
M. Chekara Bouziani ◽  
D. Khelifi
Keyword(s):  
Genetic Diversity ◽  
Molecular Weight ◽  
Durum Wheat ◽  
Bread Wheat ◽  
Allelic Variation ◽  
Low Molecular Weight ◽  
Glutenin Subunits ◽  
Lmw Glutenin Subunits ◽  
Genotypic Identification ◽  
Diversity Studies

Saharan wheats have been studied particularly from a botanical viewpoint. Genotypic identification, classification and genetic diversity studies to date were essentially based on the morphology of the spike and grain. For this, the allelic variation at the glutenin loci was studied in a set of Saharan bread and durum wheats from Algerian oases where this crop has been traditionally cultivated. The high molecular weight and low molecular weight glutenin subunit composition of 40 Saharan bread and 30 durum wheats was determined by SDS-PAGE. In Saharan bread wheats 32 alleles at the six glutenin loci were detected, which in combination resulted in 36 different patterns including 17 for HMW and 23 for LMW glutenin subunits. For the Saharan durum wheats, 29 different alleles were identified for the five glutenin loci studied. Altogether, 29 glutenin patterns were detected, including 13 for HMW-GS and 20 for LMW-GS. Three new alleles were found in Saharan wheats, two in durum wheat at the Glu-B1 and Glu-B3 loci, and one in bread wheat at the Glu-B1 locus. The mean indices of genetic variation at the six loci in bread wheat and at the five loci in durum wheat were 0.59 and 0.63, respectively, showing that Saharan wheats were more diverse. This information could be useful to select Saharan varieties with improved quality and also as a source of genes to develop new lines when breeding for quality.

Evaluation of genetic diversity among bread wheat varieties and landraces of Pakistan by SSR markers

2009 ◽  
Vol 37 (4) ◽  
pp. 489-498 ◽  
Author(s):  
N. Iqbal ◽  
A. Tabasum ◽  
H. Sayed ◽  
A. Hameed
Keyword(s):  
Genetic Diversity ◽  
Bread Wheat ◽  
Ssr Markers ◽  
Wheat Varieties

Selection of large seed and high yielding lines of bread wheat for drought conditions

2021 ◽  
Vol 11 (4) ◽  
pp. 595-606
Author(s):  
Dilmurodov Sherzod Dilmurodovich ◽  
Shodiyev Sherzod Shomiljonovich ◽  
Abdumajidov Jaloliddin Raxmatullaevich ◽  
Hayitov Azizbek Sherkulovich ◽  
Mavlanov Javokhir Sarvar Ogli
Keyword(s):  
Bread Wheat ◽  
Large Seed ◽  
Drought Conditions ◽  
Selection Of

scholarly journals Phenotypic diversity of bread wheat lines with introgressions from the diploid cereal Aegilops speltoides for technological properties of grain and f lour

2020 ◽  
Vol 24 (7) ◽  
pp. 738-746
Author(s):  
L. V. Shchukina ◽  
I. F. Lapochkina ◽  
T. A. Pshenichnikova
Keyword(s):  
Genetic Diversity ◽  
Bread Wheat ◽  
Phenotypic Diversity ◽  
Chromosomal Rearrangements ◽  
Diploid Species ◽  
Aegilops Speltoides ◽  
Technological Properties ◽  
Gluten Content ◽  
Spring Variety ◽  
Growing Conditions

The creation of varieties adapted to changing environmental conditions, resistant to various pathogens, and satisfying various grain purposes is impossible without using the genetic diversity of wheat. One of the ways to expand the genetic diversity of wheat is to introduce new variants of genes from the genetic pool of congeners and wild relatives into the genotypes of existing varieties. In this study, we used 10 lines from the Arsenal collection created on the genetic basis of the spring variety ‘Rodina’ and the diploid species Aegilops speltoides in the Federal Research Center “Nemchinovka” in 1994. The lines were previously characterized for the presence of translocations and chromosomal rearrangements cytologically and using molecular markers. Technological analyses were performed on grain obtained in Western Siberia and Moscow region. The aim of this study was to establish the possibilities of expanding the phenotypic diversity for technological properties of grain and flour as a result of such hybridization of bread wheat and the diploid cereal Aegilops speltoides. The variety ‘Rodina’ forms a vitreous grain with a high gluten content in Siberia, but has low physical properties of flour and dough. Five derived lines were found to have significantly higher protein and gluten content in grain. The highest values under both growing conditions were found in lines 73/00i, 82/00i, and 84/00i. Two lines (69/00i and 76/00i) showed a high flour strength and dough elasticity, characterizing the lines as strong and valuable in quality. These lines can be used for baking bread. Line 82/00i inherited from Ae. speltoides a soft-grain endosperm, which indicates the introgression of the Ha-Sp gene, homoeoallelic to the Ha gene of bread wheat, into ‘Rodina’. Flour of this line is suitable for the manufacture of confectionery without the use of technological additives. The lines generally retained their characteristics in different growing conditions. They can be attracted as donors of new alleles of genes that determine the technological properties of grain and resistance to biotic stresses.

Temporal diversity changes among 198 Nordic bread wheat landraces and cultivars detected by retrotransposon-based S-SAP analysis

2008 ◽  
Vol 6 (02) ◽  
pp. 113-125 ◽  
Author(s):  
Shu-Chin Hysing ◽  
Torbjörn Säll ◽  
Hilde Nybom ◽  
Erland Liljeroth ◽  
Arnulf Merker ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Bread Wheat ◽  
Growth Habit ◽  
Gene Diversity ◽  
Pedigree Information ◽  
Principal Coordinates Analysis ◽  
Subsequent Increase ◽  
Principal Coordinates ◽  
Frequent Exchange ◽  
Wheat Landraces

The sequence-specific amplified polymorphism (S-SAP) method was used to genotype 198 Nordic bread wheat landraces and cultivars from the 19th to the 21st centuries. It was shown that theSukkula-9900-LARD retrotransposon primer was highly suitable for resolving closely related wheat materials. Cluster analysis was generally consistent with pedigree information and revealed a clear separation for growth habit but not for countries. A principal coordinates analysis (PCoA) showed a separation into different time periods (before 1910, 1910–1969 and 1970–2003). These results are consistent with the breeding history and pedigree information, indicating that little hybridization has occurred between winter and spring wheat, in contrast to frequent exchange of germplasm between the Nordic countries. Estimates of gene diversity, the PCoA results, and changes in band frequencies across time indicate that plant breeding has led to substantial genetic shifts in Nordic wheat. Diversity was reduced through selections from landraces during the early 20th century, followed by a period of relatively lower genetic diversity, and a subsequent increase and net gains in diversity from the late 1960s onwards through the use of exotic germplasm. Thus, an anticipated loss of overall genetic diversity was found to be negligible, although allele losses have occurred at specific loci.

Genetic diversity of high-molecular-weight glutenin subunit compositions in bread wheat landraces originated from Turkey

2016 ◽  
Vol 16 (1) ◽  
pp. 28-38 ◽  
Author(s):  
Ridvan Temizgul ◽  
Mikail Akbulut ◽  
Domenico Lafiandra
Keyword(s):  
Genetic Diversity ◽  
Molecular Weight ◽  
Genetic Variation ◽  
High Molecular Weight ◽  
Bread Wheat ◽  
Gene Diversity ◽  
Polyacrylamide Gel Electrophoresis ◽  
Genetic Erosion ◽  
Allele Polymorphism ◽  
Wheat Landraces

AbstractFocusing on 116 bread wheat landraces, this study investigated high molecular weight glutenin allele polymorphism, gene diversity, genetic variation and linkage disequilibrium (LD) inGlu-1loci. To identify gluten alleles, sodium dodesyl sulphate-polyacrylamide, gel electrophoresis was used and for statistical analyses POPGENE software was employed. The results indicated that average genetic variation (h) was the highest inGlu-B1(0.6421) and the lowest inGlu-A1locus (0.4548); genetic similarity ratio (I) was the highest inGlu-B1(1.4170); the highest average genetic diversity (Ht) was observed inGlu-B1(0.6575) and the lowest diversity was observed inGlu-A1(0.4558). It was also observed that genetic diversity inGlu-1locus was largely due to intra-population variations. Inter-population gene flow was also calculated as 4.0051. Marmara and Southeastern Anatolia regions, the results further indicated, had the highest (2.8691) and lowest (0.1694) heterozygosity. Genetic erosion risk for Turkish bread wheat landraces was also seen to be high. Considering the mutual analyses of subunits of nationwide wheat landraces, it is possible to speculate about a limited migration between the landraces. LD of the landraces was largely because of this limited migration and/or epistatic natural selection. Since Turkey is known as the gene centre for major cereals including wheat, barley, rye and oat, where they diversified and spread throughout the world, studying the gluten allele diversity of Turkish bread wheat landraces is important. In addition, this study has revealed the applicability of LD, and neutrality tests to gluten protein diversity for the first time.

scholarly journals Estimating Genetic Diversity in Durum and Bread Wheat Cultivars from Turkey using AFLP and SAMPL Markers

2007 ◽  
Vol 0 (0) ◽  
pp. 070915221117006-??? ◽  
Author(s):  
S. Altıntaş ◽  
F. Toklu ◽  
S. Kafkas ◽  
B. Kilian ◽  
A. Brandolini ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Bread Wheat ◽  
Wheat Cultivars
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