Publications by authors named "Rashid Muhammad Abdul Rehman"

Marburg virus (MV) is a highly etiological agent of haemorrhagic fever in humans and has spread across the world. Its outbreaks caused a 23-90% human death rate. However, there are currently no authorized preventive or curative measures yet.

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Wheat has a large and diverse repertoire of NLRs involved in disease resistance, with over 1500 NLRs detected in some studies. These NLR genes occur as singletons or clusters containing copies of NLRs from different phylogenetic clades. The number of NLRs and cluster size can differ drastically among ecotypes and cultivars.

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Background: Heat stress threatens rice yield and quality at flowering stage. In this study, average relative seed setting rate under heat stress (RHSR) and genotypes of 284 varieties were used for a genome-wide association study.

Results: We identified eight and six QTLs distributed on chromosomes 1, 3, 4, 5, 7 and 12 in the full population and indica, respectively.

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Background: Wheat is a staple cereal food around the globe. It provides a significant source of proteins, carbohydrates, and other micronutrients to humans. When grown on cadmium (Cd) contaminated soils, the uptake of trace elements .

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Background: Plant aquaporins are critical genetic players performing multiple biological functions, especially climate resilience and water-use efficiency. Their genomic diversity across genus Oryza is yet to be explored.

Results: This study identified 369 aquaporin-encoding genes from 11 cultivated and wild rice species and further categorized these into four major subfamilies, among which small basic intrinsic proteins are speculated to be ancestral to all land plant aquaporins.

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Mango () fruit is known for its taste, health benefits, and drought tolerance. Potassium (K) is one of the most abundant ions in a plant cell. It is important for various biological functions related to plant growth, development, and flowering/fruiting.

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Article Synopsis
  • Climate change poses significant challenges to agriculture and food security, making it crucial to understand traits linked to grain development and yield for developing climate-resilient wheat cultivars.
  • This study evaluated 105 bread wheat genotypes under various conditions (control, drought, heat stress) to identify genetic markers associated with key traits using a genome-wide association study (GWAS) approach.
  • The research uncovered 541 significant associations between markers and traits, highlighting several genetic loci that can help in breeding drought- and heat-tolerant wheat varieties, ultimately supporting food security goals.
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Background: Heterosis, or hybrid vigor, refers to the phenotypic superiority of an F hybrid relative to its parents in terms of growth rate, biomass production, grain yield, and stress tolerance. Light is an energy source and main environmental cue with marked impacts on heterosis in plants. Research into the production applications and mechanism of heterosis has been conducted for over a century and a half, but little is known about the effect of light on plant heterosis.

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DNA-binding with one finger (Dof) transcription factors have been demonstrated to regulate various stresses and developmental processes in plants. Their identification and comparative evolutionary analyses in cultivated and wild species of genus oryza were yet to be explored. In this context, we report a comprehensive genomics atlas of DNA-binding with one finger (Dof) family genes in 13 diverse rice genomes (five cultivated and eight rice wild-relatives) through a genome-wide scanning approach.

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Background: Begomovirus is one of the most devastating pathogens that can cause more than 90% yield loss in various crop plants. The pathogenicity determinant βC1, located on the betasatellite associated with monopartite begomoviruses, alters the host signaling mechanism to enhance the viral disease phenotype by undermining the host immunity. The understanding of its interacting proteins in host plants to develop disease symptoms such as curly leaves, enations, vein swelling, and chlorosis is crucial to enhance the disease resistance in crop plants.

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  • * The study analyzed 795 rice genotypes to evaluate lodging resistance using genome-wide association studies (GWAS) and identified 375 quantitative trait loci (QTLs) related to culm strength across the rice genome.
  • * The research discovered 33 pleiotropic loci affecting multiple traits and highlighted a specific candidate gene on chromosome 7 that significantly contributes to lodging resistance, with functional variations in its promoter linked to these traits.
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  • The NB-ARC gene family is crucial for plant development, especially in rice, but the mechanisms by which they control development in the panicle are not fully understood.
  • A genome-wide analysis of 258 NB-ARC genes revealed three main groups, with group II further divided into nine subgroups, and evolutionary studies showed conserved segments in related plants under weak selective pressure.
  • Expression analysis indicated that most NB-ARC genes are active in roots, panicles, and leaves during panicle development, with the RGH1A gene impacting yield traits like panicle length and grain number.
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Background: Glutinous rice as a special endosperm type is consumed as a staple food in East Asian countries by consumers' preference. Genetic studies on glutinous rice could be conducive to improve rice quality and understand its development and evolution. Therefor, we sought to explore more genes related to glutinous by genome wide association study and research the formation history for glutinous.

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  • Understanding the genetic factors that affect wheat yield and drought tolerance is crucial for improving wheat breeding practices, and a genome-wide association study was conducted using a high-density SNP array to analyze various wheat genotypes.
  • The study involved phenotyping wheat accessions grown under both normal and water-stressed conditions, revealing significant differences in yield and drought-related traits, and identifying correlations between grain yield and relative water content.
  • A total of 134 significant SNPs were linked to yield and drought tolerance, with the discovery of novel markers and the identification of 171 candidate genes that could enhance our understanding and breeding of drought-resistant wheat.
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  • The study focuses on the genetic factors affecting heat tolerance in wheat, which is crucial for improving yields and ensuring food security as global temperatures rise.
  • Researchers used a genome-wide association study (GWAS) with a high-density SNP array to analyze diverse wheat genotypes under both normal and heat-stressed conditions, identifying significant genetic variations and marker-trait associations (MTAs).
  • Key findings include the discovery of several MTAs linked to physiological and yield traits, with some candidates showing pleiotropic effects across different conditions, paving the way for developing heat-tolerant wheat varieties.
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Rice ( L.) is an important staple food crop for more than half of the world's population. Enhancing the grain quality and yield of rice to meet growing demand remains a major challenge.

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  • Potassium is essential for plant health, making up to 10% of a plant's dry weight, and plants have complex systems to transport it from the soil to their various parts.
  • The study identified 39 potassium transport genes in a specific plant, categorizing them into transporters and channels, with discovery of conservation in their structure and function across species.
  • Analysis showed that many of these genes are involved in responses to abiotic stresses like salt, heat, and drought, and their expression changes when plants face these stresses, indicating their importance in maintaining plant health.
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Background: The speciation and fast global domestication of bread wheat have made a great impact on three subgenomes of bread wheat. DNA base composition is an essential genome feature, which follows the individual-strand base equality rule and [AT]-increase pattern at the genome, chromosome, and polymorphic site levels among thousands of species. Systematic analyses on base compositions of bread wheat and its wild progenitors could facilitate further understanding of the evolutionary pattern of genome/subgenome-wide base composition of allopolyploid species and its potential causes.

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Rice is an important cereal crop that serves as staple food for more than half of the world population. Abiotic stresses resulting from changing climatic conditions are continuously threating its yield and production. Genes in APETALA-2 (AP2) family encode transcriptional regulators implicated during regulation of developmental processes and abiotic stress responses but their identification and characterization in indica rice was still missing.

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Abiotic stresses are the major limiting factors influencing the growth and productivity of plants species. To combat these stresses, plants can modify numerous physiological, biochemical, and molecular processes through cellular and subcellular signaling pathways. Calcium-dependent protein kinases (CDPKs or CPKs) are the unique and key calcium-binding proteins, which act as a sensor for the increase and decrease in the calcium (Ca) concentrations.

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China is the world's leading country for potato production but potato is not native to China. To gain insights into the genetic diversity of potato germplasm various studies have been performed but no study has been reported for potato landraces in China. To improve the available genepool for future potato breeding programs, a diverse population containing 292 genotypes (including foreign elite lines, local landraces and cultivars) was developed and genotyped using 30 SSR markers covering the entire potato genome.

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The vigorous shoots and roots help to improve drought resistance and post-transplanting recovery in rice seedlings (Oryza sativa L.). Hundreds of loci related to root system have been identified recently, but little research has been done on shoot traits, and the relationship between roots and shoots development is also still unclear.

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A robust (long and thick) root system is characteristic of upland japonica rice adapted to drought conditions. Using deep sequencing and large scale phenotyping data of 795 rice accessions and an integrated strategy combining results from high resolution mapping by GWAS and linkage mapping, comprehensive analyses of genomic, transcriptomic and haplotype data, we identified large numbers of QTLs affecting rice root length and thickness (RL and RT) and shortlisted relatively few candidate genes for many of the identified small-effect QTLs. Forty four and 97 QTL candidate genes for RL and RT were identified, and five of the RL QTL candidates were validated by T-DNA insertional mutation; all have diverse functions and are involved in root development.

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Grain size, one of the important components determining grain yield in rice, is controlled by the multiple quantitative trait loci (QTLs). Intensive artificial selection for grain size during domestication is evidenced in modern cultivars compared to their wild relatives. Here, we report the molecular cloning and characterization of OsLG3b, a QTL for grain length in tropical japonica rice that encodes MADS-box transcription factor 1 (OsMADS1).

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