Drought Stress Tolerance in Wheat and Barley: Advances in Physiology, Breeding and Genetics Research

International Journal of Molecular Sciences, Journal Year: 2019, Volume and Issue: 20(13), P. 3137 - 3137

Published: June 27, 2019

Climate change is a major threat to most of the agricultural crops grown in tropical and sub-tropical areas globally. Drought stress one consequences climate that has negative impact on crop growth yield. In past, many simulation models were proposed predict drought occurrences, it extremely important improve essential meet challenges which limits productivity production. Wheat barley are among common widely used due their economic social values. Many parts world depend these two for food feed, both vulnerable stress. Improving tolerance very challenging task wheat researchers more research needed better understand this The progress made understanding advances three main areas: physiology, breeding, genetic research. physiology focused physiological biochemical metabolic pathways plants use when exposed New genotypes having high degree produced through breeding by making crosses from promising drought-tolerant selecting progeny. Also, identifying genes contributing important. Previous studies showed polygenic trait constitution will help dissect gene network(s) controlling tolerance. This review explores recent barley.

Language: Английский

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Genetic Diversity and Population Structure of F3:6 Nebraska Winter Wheat Genotypes Using Genotyping-By-Sequencing

Frontiers in Genetics, Journal Year: 2018, Volume and Issue: 9

Published: March 12, 2018

The availability of information on the genetic diversity and population structure in wheat (Triticum aestivum L.) breeding lines will help breeders to better use their resources manage variation program. recent advances sequencing technology provide opportunity identify tens or hundreds thousands single nucleotide polymorphism (SNPs) large genome species (e.g., wheat). These SNPs can be utilized for understanding performing wide association studies (GWAS) complex traits. In this study, were investigated a set 230 genotypes (F3:6) derived from various crosses as prerequisite GWAS genomic selection. Genotyping-by-sequencing provided 25,566 high-quality SNPs. content (PIC) across chromosomes ranged 0.09 0.37 with an average 0.23. distribution markers 21 319 chromosome 3D 2,370 3B. analysis revealed three subpopulations (G1, G2, G3). Analysis molecular variance identified 8% among 92% within subpopulations. Of subpopulations, G2 had highest level based indices: Shannon's index (I) = 0.494, (h) 0.328 unbiased (uh) 0.331, while G3 lowest (I 0.348, h 0.226 uh 0.236). This high used develop new cultivars.

Language: Английский

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Genome-Wide Association Study Reveals Novel Genomic Regions for Grain Yield and Yield-Related Traits in Drought-Stressed Synthetic Hexaploid Wheat

International Journal of Molecular Sciences, Journal Year: 2018, Volume and Issue: 19(10), P. 3011 - 3011

Published: Oct. 2, 2018

Synthetic hexaploid wheat (SHW; 2n = 6x 42, AABBDD, Triticum aestivum L.) is produced from an interspecific cross between durum (2n 4x 28, AABB, T. turgidum and goat grass 2x 14, DD, Aegilops tauschii Coss.) reported to have significant novel alleles-controlling biotic abiotic stresses resistance. A genome-wide association study (GWAS) was conducted unravel these loci [marker–trait associations (MTAs)] using 35,648 genotyping-by-sequencing-derived single nucleotide polymorphisms in 123 SHWs. We identified 90 MTAs (45, 11, 34 on the A, B, D genomes, respectively) haplotype blocks associated with grain yield yield-related traits including root under drought stress. The phenotypic variance explained by ranged 1.1% 32.3%. Most of (120 out 194) were found genes, 45 genes annotated as having a potential role This result provides further evidence for reliability identified. large number (53) especially D-genome demonstrate SHWs elucidating genetic architecture complex provide opportunity improvement rapidly changing climatic conditions.

Language: Английский

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Fine mapping and gene cloning in the post-NGS era: advances and prospects

Theoretical and Applied Genetics, Journal Year: 2020, Volume and Issue: 133(5), P. 1791 - 1810

Published: Feb. 10, 2020

Abstract Improvement in traits of agronomic importance is the top breeding priority crop improvement programs. Majority these show complex quantitative inheritance. Identification trait loci (QTLs) followed by fine mapping QTLs and cloning candidate genes/QTLs central to analysis. Advances genomic technologies revolutionized our understanding genetics traits, regions associated with were employed marker-assisted or QTLs/genes. Next-generation sequencing (NGS) have enabled genome-wide methodologies for development ultra-high-density genetic linkage maps different crops, thus allowing placement within few kbs genomes. In this review, we compare marker systems used QTL pre- post-NGS era. We then discuss how NGS platforms combination advanced experimental designs improved analysis mapping. opine that efficient genotyping/sequencing assays may circumvent need cumbersome procedures earlier A deeper architectures agricultural significance will be crucial accelerate improvement.

Language: Английский

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Genetic diversity, linkage disequilibrium, and population structure analysis of the tea plant (Camellia sinensis) from an origin center, Guizhou plateau, using genome-wide SNPs developed by genotyping-by-sequencing

BMC Plant Biology, Journal Year: 2019, Volume and Issue: 19(1)

Published: July 23, 2019

To efficiently protect and exploit germplasm resources for marker development breeding purposes, we must accurately depict the features of tea populations. This study focuses on Camellia sinensis (C. sinensis) population aims to (i) identify single nucleotide polymorphisms (SNPs) genome level, (ii) investigate genetic diversity structure, (iii) characterize linkage disequilibrium (LD) pattern facilitate next genome-wide association mapping marker-assisted selection. We collected 415 accessions from Origin Center analyzed diversity, structure LD using genotyping-by-sequencing (GBS) approach. A total 79,016 high-quality SNPs were identified; polymorphism information content (PIC) (GD) based these showed a higher level in cultivated type than wild type. The clustered into three groups by STRUCTURE software confirmed principal component analyses (PCA)—wild type, admixed However, unweighted pair group method with arithmetic mean (UPGMA) trees indicated should be grouped more clusters. Further identified four groups, Pure Wild Type, Admixed ancient landraces modern STRUCTURE, results PCA UPGMA tree method. was detected Type that landraces. highest differentiation between relatively fast decay short range (kb) observed, decays inferred populations different. is, our knowledge, first analysis Center, Guizhou Plateau, GBS. pattern, revealed will benefit further studies, protection, breeding.

Language: Английский

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QTL mapping for yield-related traits in wheat based on four RIL populations

Theoretical and Applied Genetics, Journal Year: 2020, Volume and Issue: 133(3), P. 917 - 933

Published: Jan. 2, 2020

Language: Английский

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GWAS revealed effect of genotype × environment interactions for grain yield of Nebraska winter wheat

BMC Genomics, Journal Year: 2021, Volume and Issue: 22(1)

Published: Jan. 2, 2021

Abstract Background Improving grain yield in cereals especially wheat is a main objective for plant breeders. One of the constrains improving this trait G × E interaction (GEI) which affects performance genotypes different environments. Selecting high yielding that can be used target set environments needed. Phenotypic selection misleading due to environmental conditions. Incorporating information from phenotypic and genomic analyses useful selecting higher group Results A 270 F 3:6 Nebraska winter breeding program was tested nine High genetic variation found among genotypes. also highly significant. The highest genotype differed each environment. correlation low (0 0.43). Genome-wide association study revealed 70 marker traits (MTAs) associated with increased yield. analysis linkage disequilibrium 16 regions significant (LD). candidate parents’ were selected based on three criteria; number alleles genotype, distance genotypes, between two parents. Conclusion Although present, advances DNA technology provided very tools analyzes. Such features helped genetically select cross production

Language: Английский

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Combined GWAS and QTL mapping revealed candidate genes and SNP network controlling recovery and tolerance traits associated with drought tolerance in seedling winter wheat

Genomics, Journal Year: 2022, Volume and Issue: 114(3), P. 110358 - 110358

Published: April 6, 2022

To date, very little research on drought tolerance has been conducted at the seedling stage in winter wheat. In this study, two types of traits, namely and recovery associated with were scored biparental mapping population (BPP) association (A-set). The results study revealed no or weak significant correlation between traits. Based GWAS QTL analyses, all QTLs traits completely different from those except one each that was found to be trait trait. analysis SNP gene networks confirmed combined mapping. One marker located 2B chromosome (S2B_26494801) both populations. provided new information understanding improving

Language: Английский

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Flag leaf size and posture of bread wheat: genetic dissection, QTL validation and their relationships with yield-related traits

Theoretical and Applied Genetics, Journal Year: 2019, Volume and Issue: 133(1), P. 297 - 315

Published: Oct. 18, 2019

Language: Английский

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Molecular genetic analysis of spring wheat core collection using genetic diversity, population structure, and linkage disequilibrium

BMC Genomics, Journal Year: 2020, Volume and Issue: 21(1)

Published: June 26, 2020

Abstract Background Wheat ( Triticum aestivium L.) is an important crop globally which has a complex genome. To identify the parents with useful agronomic characteristics that could be used in various breeding programs, it very to understand genetic diversity among global wheat genotypes. Also, understanding studies such as marker-assisted selection (MAS), genome-wide association (GWAS), and genomic selection. Results wheat, set of 103 spring genotypes represented five different continents were used. These genotyped using 36,720 genotyping-by-sequencing derived SNPs (GBS-SNPs) well distributed across chromosomes. The tested 103-wheat contained three subpopulations based on population structure, principle coordinate, kinship analyses. A significant variation was found within AMOVA. Subpopulation 1 more diverse subpopulation allelic patterns Na , Ne I h uh ). No high linkage disequilibrium between SNPs. However, level, D genome have highest LD compared two other genomes B. ratio number LD/number non-significant suggested chromosomes 2D, 5A, 7B are their value 0.08, 0.07, 0.05, respectively. Based decay, lowest haplotype blocks chromosome 2D. Conclusion recent study concluded 103-spring GBS-SNP markers appropriate for GWAS QTL-mapping. core collection comprises subpopulations. Genotypes most future programs if they desired traits. distribution hotspots investigated provides information regions includes interesting genes.

Language: Английский

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