15 results on '"Sarwar, Azam"'
Search Results
2. Non-Synonymous Variants in Fat QTL Genes among High- and Low-Milk-Yielding Indigenous Breeds
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Neelam A. Topno, Veerbhan Kesarwani, Sandeep Kumar Kushwaha, Sarwar Azam, Mohammad Kadivella, Ravi Kumar Gandham, and Subeer S. Majumdar
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milk fat ,whole-genome sequencing ,SNPs ,genomic variation ,variant calling ,indigenous breeds ,Veterinary medicine ,SF600-1100 ,Zoology ,QL1-991 - Abstract
The effect of breed on milk components—fat, protein, lactose, and water—has been observed to be significant. As fat is one of the major price-determining factors for milk, exploring the variations in fat QTLs across breeds would shed light on the variable fat content in their milk. Here, on whole-genome sequencing, 25 differentially expressed hub or bottleneck fat QTLs were explored for variations across indigenous breeds. Out of these, 20 genes were identified as having nonsynonymous substitutions. A fixed SNP pattern in high-milk-yielding breeds in comparison to low-milk-yielding breeds was identified in the genes GHR, TLR4, LPIN1, CACNA1C, ZBTB16, ITGA1, ANK1, and NTG5E and, vice versa, in the genes MFGE8, FGF2, TLR4, LPIN1, NUP98, PTK2, ZTB16, DDIT3, and NT5E. The identified SNPs were ratified by pyrosequencing to prove that key differences exist in fat QTLs between the high- and low-milk-yielding breeds.
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- 2023
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3. Living ghosts and the Laapata: the episode of genocide continuum in Pakistani art.
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Sarwar, Azam
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PAKISTANI art , *GENOCIDE , *WAR on Terrorism, 2001-2009 , *POLITICAL change - Abstract
The systematic disappearance of individuals is very much a global phenomenon. In Pakistan, this phenomenon re-emerged after Pakistan decided to get involved in the U.S.-led 'war on terror' in the wake of 9/11. This paper exposes the politics of necropolitics in Pakistan through art, as death plays a significant role in setting up a political change. I contend that Ramla Fatima's artworks put a human face to death and speak truth to power, to draw on Foucault, interlinking death with politics to expose the hiding and camouflaging of death in Pakistan. Fatima's artworks represent another episode of the genocide continuum in Pakistan – the unending enforced disappearances and the sufferings of the families of the laapata – the disappeared. By painting necropolitics, she transgresses the silencing culture, a legacy of enforced disappearances. Through art, she illustrates how victims and their families are condemned to a state of subalternity and ambiguity – ambiguous loss, slow violence and torture, and psychological scars. Her artworks also draw attention to the role of expressive art in evoking awareness of human rights violations and establishing the fact that the laapata's lives matter. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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4. Transgression and transcendence in Shoaib Mansoor's feminist trilogy.
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Sarwar, Azam
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WOMEN'S empowerment , *FEMININITY , *FEMINISTS , *COLLECTIVE representation , *OTHER (Philosophy) - Abstract
This article examines Shoaib Mansoor's cult feminist trilogy—Khuda Kay Liye (2007), Bol (2011), Verna (2017)—to demonstrate how his transgressive heroines transgress myths of femininity, for example, those pertaining to Otherness, division, and the eternal feminine. Mansoor features transgressive heroines who transcend the patriarchal boundaries structured to contain them and challenge the voice of male authority. His heroines' transgressions thus take agency as the driving force for pursuing self-fulfilment in transcendence, undermining the domineering traits of patriarchy embedded in the status quo and herd values. The article adumbrates Pakistani cinema's transitional odyssey from women as docile bodies to transcendent agents by analyzing heroines' portrayals in traditional Pakistani cinema. I argue that Mansoor's feminist trilogy significantly contributes to women's cinema by addressing the audience as a woman and concerning with women. As Mansoor persuasively features transgressive heroines, watching the feminist trilogy as counter-narrative provides us with the representation of women as social subjects whose transformative actions destabilize discursive formations, accomplish transcendence, and create a space of woman empowerment. [ABSTRACT FROM AUTHOR]
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- 2023
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5. Genetic Characterization and Comparative Genome Analysis of Brucella melitensis Isolates from India
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Sarwar Azam, Sashi Bhushan Rao, Padmaja Jakka, Veera NarasimhaRao, Bindu Bhargavi, Vivek Kumar Gupta, and Girish Radhakrishnan
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Genetics ,QH426-470 - Abstract
Brucellosis is the most frequent zoonotic disease worldwide, with over 500,000 new human infections every year. Brucella melitensis, the most virulent species in humans, primarily affects goats and the zoonotic transmission occurs by ingestion of unpasteurized milk products or through direct contact with fetal tissues. Brucellosis is endemic in India but no information is available on population structure and genetic diversity of Brucella spp. in India. We performed multilocus sequence typing of four B. melitensis strains isolated from naturally infected goats from India. For more detailed genetic characterization, we carried out whole genome sequencing and comparative genome analysis of one of the B. melitensis isolates, Bm IND1. Genome analysis identified 141 unique SNPs, 78 VNTRs, 51 Indels, and 2 putative prophage integrations in the Bm IND1 genome. Our data may help to develop improved epidemiological typing tools and efficient preventive strategies to control brucellosis.
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- 2016
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6. Genome Organization and Adaptive Potential of Archetypal Organophosphate Degrading Sphingobium fuliginis ATCC 27551
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Sarwar Azam, Chhaya Singh, Dayananda Siddavattam, Sunil Parthasarathy, and Shakti Kumar
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plasmids ,mobile elements ,genome sequence ,Biology ,Genome ,biodegradation ,Sphingobium ,03 medical and health sciences ,Plasmid ,Genetics ,Ecology, Evolution, Behavior and Systematics ,Phylogeny ,030304 developmental biology ,Genomic organization ,Whole genome sequencing ,organophosphate hydrolase ,0303 health sciences ,Whole Genome Sequencing ,030306 microbiology ,Molecular Sequence Annotation ,biology.organism_classification ,Genome Report ,Sphingomonadaceae ,Horizontal gene transfer ,horizontal gene transfer ,Mobile genetic elements ,GC-content ,Genome, Bacterial - Abstract
Sphingobium fuliginis ATCC 27551, previously classified as Flavobacterium sp. ATCC 27551, degrades neurotoxic organophosphate insecticides and nerve agents through the activity of a membrane-associated organophosphate hydrolase. This study was designed to determine the complete genome sequence of S. fuliginis ATCC 27551 to unravel its degradative potential and adaptability to harsh environments. The 5,414,624 bp genome with a GC content of 64.4% is distributed between two chromosomes and four plasmids and encodes 5,557 proteins. Of the four plasmids, designated as pSF1, pSF2, pSF3, and pSF4, only two (pSF1 and pSF2) are self-transmissible and contained the complete genetic repertoire for a T4SS. The other two plasmids (pSF3 and pSF4) are mobilizable and both showed the presence of an oriT and relaxase-encoding sequences. The sequence of plasmid pSF3 coincided with the previously determined sequence of pPDL2 and included an opd gene encoding organophosphate hydrolase as a part of the mobile element. About 15,455 orthologous clusters were identified from among the cumulatively annotated genes of 49 Sphingobium species. Phylogenetic analysis done using the core genome consisting of 802 orthologous clusters revealed a close relationship between S. fuliginis ATCC 27551 and bacteria capable of degradation of polyaromatic hydrocarbon compounds. Genes coding for transposases, efflux pumps conferring resistance to heavy metals, and TonR-type outer membrane receptors are selectively enriched in the genome of S. fuliginis ATCC 27551 and appear to contribute to the adaptive potential of the organism to challenging and harsh environments.
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- 2019
7. Comprehensive transcriptome assembly of Chickpea (Cicer arietinum L.) using sanger and next generation sequencing platforms: development and applications.
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Himabindu Kudapa, Sarwar Azam, Andrew G Sharpe, Bunyamin Taran, Rong Li, Benjamin Deonovic, Connor Cameron, Andrew D Farmer, Steven B Cannon, and Rajeev K Varshney
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Medicine ,Science - Abstract
A comprehensive transcriptome assembly of chickpea has been developed using 134.95 million Illumina single-end reads, 7.12 million single-end FLX/454 reads and 139,214 Sanger expressed sequence tags (ESTs) from >17 genotypes. This hybrid transcriptome assembly, referred to as Cicer arietinumTranscriptome Assembly version 2 (CaTA v2, available at http://data.comparative-legumes.org/transcriptomes/cicar/lista_cicar-201201), comprising 46,369 transcript assembly contigs (TACs) has an N50 length of 1,726 bp and a maximum contig size of 15,644 bp. Putative functions were determined for 32,869 (70.8%) of the TACs and gene ontology assignments were determined for 21,471 (46.3%). The new transcriptome assembly was compared with the previously available chickpea transcriptome assemblies as well as to the chickpea genome. Comparative analysis of CaTA v2 against transcriptomes of three legumes - Medicago, soybean and common bean, resulted in 27,771 TACs common to all three legumes indicating strong conservation of genes across legumes. CaTA v2 was also used for identification of simple sequence repeats (SSRs) and intron spanning regions (ISRs) for developing molecular markers. ISRs were identified by aligning TACs to the Medicago genome, and their putative mapping positions at chromosomal level were identified using transcript map of chickpea. Primer pairs were designed for 4,990 ISRs, each representing a single contig for which predicted positions are inferred and distributed across eight linkage groups. A subset of randomly selected ISRs representing all eight chickpea linkage groups were validated on five chickpea genotypes and showed 20% polymorphism with average polymorphic information content (PIC) of 0.27. In summary, the hybrid transcriptome assembly developed and novel markers identified can be used for a variety of applications such as gene discovery, marker-trait association, diversity analysis etc., to advance genetics research and breeding applications in chickpea and other related legumes.
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- 2014
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8. An integrated SNP mining and utilization (ISMU) pipeline for next generation sequencing data.
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Sarwar Azam, Abhishek Rathore, Trushar M Shah, Mohan Telluri, BhanuPrakash Amindala, Pradeep Ruperao, Mohan A V S K Katta, and Rajeev K Varshney
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Medicine ,Science - Abstract
Open source single nucleotide polymorphism (SNP) discovery pipelines for next generation sequencing data commonly requires working knowledge of command line interface, massive computational resources and expertise which is a daunting task for biologists. Further, the SNP information generated may not be readily used for downstream processes such as genotyping. Hence, a comprehensive pipeline has been developed by integrating several open source next generation sequencing (NGS) tools along with a graphical user interface called Integrated SNP Mining and Utilization (ISMU) for SNP discovery and their utilization by developing genotyping assays. The pipeline features functionalities such as pre-processing of raw data, integration of open source alignment tools (Bowtie2, BWA, Maq, NovoAlign and SOAP2), SNP prediction (SAMtools/SOAPsnp/CNS2snp and CbCC) methods and interfaces for developing genotyping assays. The pipeline outputs a list of high quality SNPs between all pairwise combinations of genotypes analyzed, in addition to the reference genome/sequence. Visualization tools (Tablet and Flapjack) integrated into the pipeline enable inspection of the alignment and errors, if any. The pipeline also provides a confidence score or polymorphism information content value with flanking sequences for identified SNPs in standard format required for developing marker genotyping (KASP and Golden Gate) assays. The pipeline enables users to process a range of NGS datasets such as whole genome re-sequencing, restriction site associated DNA sequencing and transcriptome sequencing data at a fast speed. The pipeline is very useful for plant genetics and breeding community with no computational expertise in order to discover SNPs and utilize in genomics, genetics and breeding studies. The pipeline has been parallelized to process huge datasets of next generation sequencing. It has been developed in Java language and is available at http://hpc.icrisat.cgiar.org/ISMU as a standalone free software.
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- 2014
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9. Breaking free from patriarchal appropriation of sacred texts: An Islamic feminist critique of Bol.
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Sarwar, Azam and Zeng, Hong
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MUSLIM women ,FEMINISM ,FEMINIST theory ,WOMEN'S rights ,ISLAMIC fundamentalism ,FEMINISTS ,INSTRUCTIONAL films - Abstract
This paper is focused on Shoaib Mansoor's feminist film, Bol (2011), seen as a commentary on religious "absolute explanatory schemes."
1 Arguing that the film demonstrates how Pakistani patriarchy maneuvers sacred texts to construct comforting illusions for women, this paper uses the theory of Islamic Feminism to unravel the politics of religious interpretation and the discursive influence of Islamic fundamentalism. It notes that the protagonist's inner conflict is a transgressional act and dragoons her into disrupting socio-religious boundaries. The paper also examines the film's confessional nature, exposing gender inequalities and injustices exercised through self-authorized religious dogma. Viewers of Bol enter a journey not only through the nodi that confront women and plague contemporary enunciations of Islam, but also through heterogeneous forms of iniquitous oppression, systematic bigotry, forced marriage, and endemic violence. The article concludes that by bridging the gulf between Islam and feminism, women's rights movements can be effective in the Islamic world. [ABSTRACT FROM AUTHOR]- Published
- 2021
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10. Leptospira surface adhesin (Lsa21) induces Toll like receptor 2 and 4 mediated inflammatory responses in macrophages
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Syed M. Faisal, M. Subathra, Vivek Phani Varma, Anil K. Sunkara, Yung-Fu Chang, Mohd Akif, Sarwar Azam, and Mirza S. Baig
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0301 basic medicine ,MAP Kinase Signaling System ,030106 microbiology ,Article ,Cell Line ,Proinflammatory cytokine ,Mice ,03 medical and health sciences ,Leptospira ,Protein Interaction Mapping ,Animals ,Humans ,Leptospirosis ,Phosphorylation ,Adhesins, Bacterial ,Inflammation ,Toll-like receptor ,Multidisciplinary ,Innate immune system ,biology ,Chemistry ,Macrophages ,biology.organism_classification ,Antibodies, Neutralizing ,Immunity, Innate ,Recombinant Proteins ,Toll-Like Receptor 2 ,Cell biology ,Mice, Inbred C57BL ,Toll-Like Receptor 4 ,TLR2 ,HEK293 Cells ,RAW 264.7 Cells ,030104 developmental biology ,Myeloid Differentiation Factor 88 ,Immunology ,TLR4 ,Cytokines ,bacteria ,Female ,Cytokine secretion ,Signal transduction ,Signal Transduction - Abstract
Leptospirosis is zoonotic and emerging infectious disease of global importance. Little is understood about Leptospira pathogenesis and host immune response. In the present work we have investigated how Leptospira modulates the host innate immune response mediated by Toll-like receptors (TLRs) via surface exposed proteins. We screened Leptospira outer membrane/surface proteins for their ability to activate/inhibit TLR2/4 signaling in HEK293 cell lines. Of these the 21 kDa Leptospira surface adhesin, Lsa21 had strong TLR2 and TLR4 activity leading to production of proinflammatory cytokines and expression of costimulatory molecules in mouse macrophages. This activity of Lsa21 on innate response was dependent on activation of mitogen activated protein kinases (MAPKs) via stimulating the rapid phosphorylation of p38, JNK and activation of transcription factor NF-κB. Additionally, neutralizing antibodies against TLR2 and TLR4 significantly inhibited cytokine secretion and attenuated Lsa21 induced phosphorylation of p38 and JNK. Furthermore, Lsa21 induced cytokine levels were significantly lower in TLR2−/− and TLR4−/− than in wild type mouse macrophage cell lines. Confocal microscopy and molecular docking confirmed that Lsa21 interacted with both TLR2 and TLR4. These results indicate that Lsa21 is a potent TLR2 and TLR4 agonist that induces strong innate response and may play important role in Leptospira pathogenesis.
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- 2016
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11. Identification and Validation of Selected Universal Stress Protein Domain Containing Drought-Responsive Genes in Pigeonpea (Cajanus cajan L.)
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Rachit K. Saxena, L. Krishnamurthy, Vikas K. Singh, Aamir W. Khan, Sarwar Azam, Pallavi Sinha, Lekha T. Pazhamala, and Rajeev K. Varshney
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0106 biological sciences ,0301 basic medicine ,Antiporter ,legumes ,Protein domain ,Drought tolerance ,Plant Science ,Biology ,lcsh:Plant culture ,01 natural sciences ,03 medical and health sciences ,Cajanus ,Genotype ,Gene expression ,in silico analysis ,lcsh:SB1-1110 ,in-silico analysis ,Gene ,Original Research ,Genetics ,business.industry ,pigeonpea ,food and beverages ,biology.organism_classification ,drought responsive genes ,Biotechnology ,Gene expression profiling ,other legumes ,030104 developmental biology ,expression profiling ,business ,010606 plant biology & botany - Abstract
Pigeonpea is a resilient crop, which is relatively more drought tolerant than many other legume crops. To understand the molecular mechanisms of this unique feature of pigeonpea, 51 genes were selected using the Hidden Markov Models (HMM) those codes for proteins having close similarity to universal stress protein domain. Validation of these genes was conducted on three pigeonpea genotypes (ICPL 151, ICPL 8755, and ICPL 227) having different levels of drought tolerance. Gene expression analysis using qRT-PCR revealed 6, 8, and 18 genes to be ≥2-fold differentially expressed in ICPL 151, ICPL 8755, and ICPL 227, respectively. A total of 10 differentially expressed genes showed ≥2-fold up-regulation in the more drought tolerant genotype, which encoded four different classes of proteins. These include plant U-box protein (four genes), universal stress protein A-like protein (four genes), cation/H(+) antiporter protein (one gene) and an uncharacterized protein (one gene). Genes C.cajan_29830 and C.cajan_33874 belonging to uspA, were found significantly expressed in all the three genotypes with ≥2-fold expression variations. Expression profiling of these two genes on the four other legume crops revealed their specific role in pigeonpea. Therefore, these genes seem to be promising candidates for conferring drought tolerance specifically to pigeonpea.
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- 2016
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12. Detection of a new QTL/gene for growth habit in chickpea CaLG1 using wide and narrow crosses
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Teresa Millán, Sarwar Azam, Weidong Chen, Himabindu Kudapa, Eva Madrid, P. Castro, Josefa Rubio, Juan Gil, Latifeh Ali, Rajeev K. Varshney, CSIC - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ministry of Higher Education (Syrian Arab Republic), and International Crops Research Institute for the Semi-Arid Tropics
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Genetics ,Prostrate ,Candidate gene ,education.field_of_study ,Physical map ,Population ,food and beverages ,Plant Science ,Horticulture ,Biology ,Quantitative trait locus ,Cicer ,RAPD ,Erect ,Genetic marker ,Genetic linkage ,Microsatellite ,Semi-erect ,education ,Indel ,Agronomy and Crop Science ,Linkage analysis - Abstract
A recombinant inbred line population (RIP-9) derived from an interspecific cross (ILC72 × Cr5-10) was evaluated for growth habit during 2 years (2003 and 2004). This RIP was used to develop a pair of near isogenic lines (NILs) for erect vs prostrate growth habit in chickpea. Molecular characterization of the identified pair of NILs was performed using 52 sequence tagged microsatellite site markers distributed over different chickpea linkage groups (CaLG) of the genetic map. It revealed polymorphic markers in CaLG1 and CaLG3. Starting from a previous data base simple linear regression was applied to detect association between markers and growth habit. The RAPD (random amplified polymorphic DNA) marker OPAD091053 mapped on CaLG1 explained the highest percentage (maximum 15.4 %) of the total phenotypic variation for growth habit and it was used to develop a SCAR (sequence characterized amplified region) marker (SCAD091053). New markers were developed from sequences surrounding SCAD091053 in the physical map. QTL (quantitative trait loci) analysis revealed a new QTL (QTLHg2) in CaLG1. The Indel marker (deletion/insertion) Indel 3 and the predicted gene Ca_07000 (14,5 Mb of Ca1) and (15,3 Mb of Ca1) had the highest LOD values explaining 24.6 and 23.4 % of the phenotypic variation in years 2003 and 2004, respectively. To confirm these results, another RIP (RIP-5) derived from an intraspecific cross (WR315 × ILC3279) and segregating for erect vs semi-erect growth habit was employed. RIP-5 allowed mapping the gene (Hg2/hg2) on CaLG1 that was flnaked by two Indel markers (Indel 1 and Indel 2) in the range of 12,3 and 16,2 Mb. So, Hg2/hg2 gene corresponds to QTLHg2 region. The annotated genes Ca_07000 and Ca_06999 were homologues to predicted zinc finger genes in Glycine max and Pisum sativum, respectively. Hence, they could be considered as possible candidate genes., This work has been supported by the project INIA contract RTA2010-00059, co-financed by EU funds (FEDER). Ali L. acknowledges Ph.D. fellowship from Syrian Ministry of High Education and ICRISAT for supporting six months stay at the Center of Excellence in Genomic (ICRISAT, Patancheru, India).
- Published
- 2015
13. Draft genome sequence of chickpea (Cicer arietinum) provides a resource for trait improvement
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Steven B. Cannon, Ying Wang, Xudong Zhang, Chi Song, Janet A. Condie, Shancen Zhao, Benjamin D. Rosen, Noelia Carrasquilla-Garcia, Mahendar Thudi, Chunyan Xu, James K. Hane, Josefa Rubio, Larissa Ramsay, Bunyamin Tar’an, Hari D. Upadhyaya, Narendra Singh, Kailash C. Bansal, Juan Gil, Judith Lichtenzveig, Andrew Farmer, Peter Winter, Gengyun Zhang, Karam B. Singh, Sheng Yu, Rachit K. Saxena, Scott A. Jackson, Jaroslav Dolezel, Sarwar Azam, Andrew G. Sharpe, Carol Soderlund, Xun Xu, David Edwards, Aiko Iwata, Teresa Millán, William Nelson, Swapan K. Datta, Arvind K. Bharti, Rajeev K. Varshney, Ming-Cheng Luo, Krishna K. Gali, Weiming He, C. L. L. Gowda, R. Varma Penmetsa, Guenter Kahl, Pooran M. Gaur, N. Nadarajan, Jun Wang, Douglas R. Cook, and Jong-Min Baek
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plant genome ,Genotype ,balancing selection ,Biomedical Engineering ,Bioengineering ,Food supply ,gene sequence ,Biology ,Plant disease resistance ,Applied Microbiology and Biotechnology ,Genome ,Developing countries ,Genetic variation ,chickpea ,Domestication ,Gene ,Phylogeny ,Disease Resistance ,Repetitive Sequences, Nucleic Acid ,Whole genome sequencing ,Molecular breeding ,Shotgun sequencing ,business.industry ,Genetic Variation ,Cicer arietinum ,nucleotide sequence ,Agriculture ,DNA ,Sequence Analysis, DNA ,agronomic trait ,Cicer ,Biotechnology ,Genome sequences ,Trait improvement ,Agronomy ,Genes ,breeding ,Whole-genome shotgun ,Molecular Medicine ,Agronomic traits ,business ,Genome, Plant - Abstract
Chickpea (Cicer arietinum) is the second most widely grown legume crop after soybean, accounting for a substantial proportion of human dietary nitrogen intake and playing a crucial role in food security in developing countries. We report the ∼738-Mb draft whole genome shotgun sequence of CDC Frontier, a kabuli chickpea variety, which contains an estimated 28,269 genes. Resequencing and analysis of 90 cultivated and wild genotypes from ten countries identifies targets of both breeding-associated genetic sweeps and breeding-associated balancing selection. Candidate genes for disease resistance and agronomic traits are highlighted, including traits that distinguish the two main market classes of cultivated chickpea - desi and kabuli. These data comprise a resource for chickpea improvement through molecular breeding and provide insights into both genome diversity and domestication. Copyright © 2013 Nature America, Inc.
- Published
- 2013
14. Semiotics of Exile in Photography, Intersectional Racism and Epistemic Violence in Natasha Trethewey.
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Zeng, Hong and Sarwar, Azam
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- *
POETRY (Literary form) , *NONFICTION - Published
- 2022
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15. Genotyping-by-sequencing based intra-specific genetic map refines a ‘‘QTL-hotspot' region for drought tolerance in chickpea
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Sandip M. Kale, Pooran M. Gaur, Mahendar Thudi, Sarwar Azam, Deepa Jaganathan, Manish Roorkiwal, Rajeev K. Varshney, Henry T. Nguyen, Tim Sutton, and P. B. Kavi Kishor
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Genetic Markers ,Fine mapping ,Genotyping Techniques ,Genetic Linkage ,Population ,Quantitative Trait Loci ,Biology ,Quantitative trait locus ,CAPS/dCAPS ,Genes, Plant ,Polymorphism, Single Nucleotide ,Candidate genes ,Gene mapping ,Chickpea ,Genetic linkage ,Cleaved amplified polymorphic sequence ,Genetics ,education ,Molecular Biology ,Genetic Association Studies ,education.field_of_study ,Original Paper ,Dehydration ,“QTL-hotspot” ,Chromosome Mapping ,food and beverages ,General Medicine ,Drought tolerance ,Marker-assisted breeding ,Cicer ,Genetic distance ,Genetic marker ,Genotyping-by-sequencing - Abstract
To enhance the marker density in the “QTL-hotspot” region, harboring several QTLs for drought tolerance-related traits identified on linkage group 04 (CaLG04) in chickpea recombinant inbred line (RIL) mapping population ICC 4958 × ICC 1882, a genotyping-by-sequencing approach was adopted. In total, 6.24 Gb data from ICC 4958, 5.65 Gb data from ICC 1882 and 59.03 Gb data from RILs were generated, which identified 828 novel single-nucleotide polymorphisms (SNPs) for genetic mapping. Together with these new markers, a high-density intra-specific genetic map was developed that comprised 1,007 marker loci spanning a distance of 727.29 cM. QTL analysis using the extended genetic map along with precise phenotyping data for 20 traits collected over one to seven seasons identified 49 SNP markers in the “QTL-hotspot” region. These efforts have refined the “QTL-hotspot” region to 14 cM. In total, 164 main-effect QTLs including 24 novel QTLs were identified. In addition, 49 SNPs integrated in the “QTL-hotspot” region were converted into cleaved amplified polymorphic sequence (CAPS) and derived CAPS (dCAPS) markers which can be used in marker-assisted breeding. Electronic supplementary material The online version of this article (doi:10.1007/s00438-014-0932-3) contains supplementary material, which is available to authorized users.
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