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https://www.readbyqxmd.com/read/30254374/patterns-of-polymorphism-and-selection-in-the-subgenomes-of-the-allopolyploid-arabidopsis-kamchatica
#1
Timothy Paape, Roman V Briskine, Gwyneth Halstead-Nussloch, Heidi E L Lischer, Rie Shimizu-Inatsugi, Masaomi Hatakeyama, Kenta Tanaka, Tomoaki Nishiyama, Renat Sabirov, Jun Sese, Kentaro K Shimizu
Genome duplication is widespread in wild and crop plants. However, little is known about genome-wide selection in polyploids due to the complexity of duplicated genomes. In polyploids, the patterns of purifying selection and adaptive substitutions may be affected by masking owing to duplicated genes or homeologs as well as effective population size. Here, we resequence 25 accessions of the allotetraploid Arabidopsis kamchatica, which is derived from the diploid species A. halleri and A. lyrata. We observe a reduction in purifying selection compared with the parental species...
September 25, 2018: Nature Communications
https://www.readbyqxmd.com/read/30182237/blastmap-a-shiny-based-application-to-visualize-blast-results-as-interactive-heat-maps-and-a-tool-to-design-gene-specific-baits-for-bespoke-target-enrichment-sequencing
#2
Katie Baker, Gordon Stephen, Shona Strachan, Miles Armstrong, Ingo Hein
Numerous genes that determine the outcome of plant-pathogen interactions are currently being discovered and include, for example, immune receptors, susceptibility factors and pathogen effectors and their host targets. Target enrichment sequencing provides a means to preferentially resequence these genes of interest without the need to first generate a genotype-specific genome assembly. The Basic Local Alignment Search Tool (BLAST), in combination with the here developed BLASTmap, can be used to design probes that specifically target such gene(s), either by using the target species or the closest related genus as a reference...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29453274/select-and-resequence-reveals-relative-fitness-of-bacteria-in-symbiotic-and-free-living-environments
#3
Liana T Burghardt, Brendan Epstein, Joseph Guhlin, Matt S Nelson, Margaret R Taylor, Nevin D Young, Michael J Sadowsky, Peter Tiffin
Assays to accurately estimate relative fitness of bacteria growing in multistrain communities can advance our understanding of how selection shapes diversity within a lineage. Here, we present a variant of the "evolve and resequence" approach both to estimate relative fitness and to identify genetic variants responsible for fitness variation of symbiotic bacteria in free-living and host environments. We demonstrate the utility of this approach by characterizing selection by two plant hosts and in two free-living environments (sterilized soil and liquid media) acting on synthetic communities of the facultatively symbiotic bacterium Ensifer meliloti We find ( i ) selection that hosts exert on rhizobial communities depends on competition among strains, ( ii ) selection is stronger inside hosts than in either free-living environment, and ( iii ) a positive host-dependent relationship between relative strain fitness in multistrain communities and host benefits provided by strains in single-strain experiments...
March 6, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28219438/genomic-insights-into-divergence-and-dual-domestication-of-cultivated-allotetraploid-cottons
#4
Lei Fang, Hao Gong, Yan Hu, Chunxiao Liu, Baoliang Zhou, Tao Huang, Yangkun Wang, Shuqi Chen, David D Fang, Xiongming Du, Hong Chen, Jiedan Chen, Sen Wang, Qiong Wang, Qun Wan, Bingliang Liu, Mengqiao Pan, Lijing Chang, Huaitong Wu, Gaofu Mei, Dan Xiang, Xinghe Li, Caiping Cai, Xiefei Zhu, Z Jeffrey Chen, Bin Han, Xiaoya Chen, Wangzhen Guo, Tianzhen Zhang, Xuehui Huang
BACKGROUND: Cotton has been cultivated and used to make fabrics for at least 7000 years. Two allotetraploid species of great commercial importance, Gossypium hirsutum and Gossypium barbadense, were domesticated after polyploidization and are cultivated worldwide. Although the overall genetic diversity between these two cultivated species has been studied with limited accessions, their population structure and genetic variations remain largely unknown. RESULTS: We resequence the genomes of 147 cotton accessions, including diverse wild relatives, landraces, and modern cultivars, and construct a comprehensive variation map to provide genomic insights into the divergence and dual domestication of these two important cultivated tetraploid cotton species...
February 20, 2017: Genome Biology
https://www.readbyqxmd.com/read/27357660/borrowed-alleles-and-convergence-in-serpentine-adaptation
#5
Brian J Arnold, Brett Lahner, Jeffrey M DaCosta, Caroline M Weisman, Jesse D Hollister, David E Salt, Kirsten Bomblies, Levi Yant
Serpentine barrens represent extreme hazards for plant colonists. These sites are characterized by high porosity leading to drought, lack of essential mineral nutrients, and phytotoxic levels of metals. Nevertheless, nature forged populations adapted to these challenges. Here, we use a population-based evolutionary genomic approach coupled with elemental profiling to assess how autotetraploid Arabidopsis arenosa adapted to a multichallenge serpentine habitat in the Austrian Alps. We first demonstrate that serpentine-adapted plants exhibit dramatically altered elemental accumulation levels in common conditions, and then resequence 24 autotetraploid individuals from three populations to perform a genome scan...
July 19, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/25873147/joint-prediction-of-multiple-quantitative-traits-using-a-bayesian-multivariate-antedependence-model
#6
J Jiang, Q Zhang, L Ma, J Li, Z Wang, J-F Liu
Predicting organismal phenotypes from genotype data is important for preventive and personalized medicine as well as plant and animal breeding. Although genome-wide association studies (GWAS) for complex traits have discovered a large number of trait- and disease-associated variants, phenotype prediction based on associated variants is usually in low accuracy even for a high-heritability trait because these variants can typically account for a limited fraction of total genetic variance. In comparison with GWAS, the whole-genome prediction (WGP) methods can increase prediction accuracy by making use of a huge number of variants simultaneously...
July 2015: Heredity
https://www.readbyqxmd.com/read/25762551/origin-and-domestication-of-papaya-yh-chromosome
#7
Robert VanBuren, Fanchang Zeng, Cuixia Chen, Jisen Zhang, Ching Man Wai, Jennifer Han, Rishi Aryal, Andrea R Gschwend, Jianping Wang, Jong-Kuk Na, Lixian Huang, Lingmao Zhang, Wenjing Miao, Jiqing Gou, Jie Arro, Romain Guyot, Richard C Moore, Ming-Li Wang, Francis Zee, Deborah Charlesworth, Paul H Moore, Qingyi Yu, Ray Ming
Sex in papaya is controlled by a pair of nascent sex chromosomes. Females are XX, and two slightly different Y chromosomes distinguish males (XY) and hermaphrodites (XY(h)). The hermaphrodite-specific region of the Y(h) chromosome (HSY) and its X chromosome counterpart were sequenced and analyzed previously. We now report the sequence of the entire male-specific region of the Y (MSY). We used a BAC-by-BAC approach to sequence the MSY and resequence the Y regions of 24 wild males and the Y(h) regions of 12 cultivated hermaphrodites...
April 2015: Genome Research
https://www.readbyqxmd.com/read/25408240/te-tracker-systematic-identification-of-transposition-events-through-whole-genome-resequencing
#8
Arthur Gilly, Mathilde Etcheverry, Mohammed-Amin Madoui, Julie Guy, Leandro Quadrana, Adriana Alberti, Antoine Martin, Tony Heitkam, Stefan Engelen, Karine Labadie, Jeremie Le Pen, Patrick Wincker, Vincent Colot, Jean-Marc Aury
BACKGROUND: Transposable elements (TEs) are DNA sequences that are able to move from their location in the genome by cutting or copying themselves to another locus. As such, they are increasingly recognized as impacting all aspects of genome function. With the dramatic reduction in cost of DNA sequencing, it is now possible to resequence whole genomes in order to systematically characterize novel TE mobilization in a particular individual. However, this task is made difficult by the inherently repetitive nature of TE sequences, which in some eukaryotes compose over half of the genome sequence...
2014: BMC Bioinformatics
https://www.readbyqxmd.com/read/23641177/functional-genomics-of-tomato-in-a-post-genome-sequencing-phase
#9
Koh Aoki, Yoshiyuki Ogata, Kaori Igarashi, Kentaro Yano, Hideki Nagasaki, Eli Kaminuma, Atsushi Toyoda
Completion of tomato genome sequencing project has broad impacts on genetic and genomic studies of tomato and Solanaceae plants. The reference genome sequence derived from Solanum lycopersicum cv 'Heinz 1706' serves as the firm basis for sequencing-based approaches to tomato genomics. In this article, we first present a brief summary of the genome sequencing project and a summary of the reference genome sequence. We then focus on recent progress in transcriptome sequencing and small RNA sequencing and show how the reference genome sequence makes these analyses more comprehensive than before...
March 2013: Breeding Science
https://www.readbyqxmd.com/read/22726804/transcriptome-sequencing-for-snp-discovery-across-cucumis-melo
#10
José Blanca, Cristina Esteras, Pello Ziarsolo, Daniel Pérez, Victoria Fernã Ndez-Pedrosa, Carmen Collado, Raquel Rodrã Guez de Pablos, Alida Ballester, Cristina Roig, Joaquín Cañizares, Belén Picó
BACKGROUND: Melon (Cucumis melo L.) is a highly diverse species that is cultivated worldwide. Recent advances in massively parallel sequencing have begun to allow the study of nucleotide diversity in this species. The Sanger method combined with medium-throughput 454 technology were used in a previous study to analyze the genetic diversity of germplasm representing 3 botanical varieties, yielding a collection of about 40,000 SNPs distributed in 14,000 unigenes. However, the usefulness of this resource is limited as the sequenced genotypes do not represent the whole diversity of the species, which is divided into two subspecies with many botanical varieties variable in plant, flowering, and fruit traits, as well as in stress response...
2012: BMC Genomics
https://www.readbyqxmd.com/read/22554552/fine-scale-population-recombination-rates-hotspots-and-correlates-of-recombination-in-the-medicago-truncatula-genome
#11
Timothy Paape, Peng Zhou, Antoine Branca, Roman Briskine, Nevin Young, Peter Tiffin
Recombination rates vary across the genome and in many species show significant relationships with several genomic features, including distance to the centromere, gene density, and GC content. Studies of fine-scale recombination rates have also revealed that in several species, there are recombination hotspots, that is, short regions with recombination rates 10-100 greater than those in surrounding regions. In this study, we analyzed whole-genome resequence data from 26 accessions of the model legume Medicago truncatula to gain insight into the genomic features that are related to high- and low-recombination rates and recombination hotspots at 1 kb scales...
2012: Genome Biology and Evolution
https://www.readbyqxmd.com/read/21599914/isolation-and-analysis-of-high-quality-nuclear-dna-with-reduced-organellar-dna-for-plant-genome-sequencing-and-resequencing
#12
Kerry A Lutz, Wenqin Wang, Anna Zdepski, Todd P Michael
BACKGROUND: High throughput sequencing (HTS) technologies have revolutionized the field of genomics by drastically reducing the cost of sequencing, making it feasible for individual labs to sequence or resequence plant genomes. Obtaining high quality, high molecular weight DNA from plants poses significant challenges due to the high copy number of chloroplast and mitochondrial DNA, as well as high levels of phenolic compounds and polysaccharides. Multiple methods have been used to isolate DNA from plants; the CTAB method is commonly used to isolate total cellular DNA from plants that contain nuclear DNA, as well as chloroplast and mitochondrial DNA...
2011: BMC Biotechnology
https://www.readbyqxmd.com/read/20526617/identification-and-fine-mapping-of-a-major-quantitative-trait-locus-originating-from-wild-rice-controlling-cold-tolerance-at-the-seedling-stage
#13
Maiko Koseki, Noriyuki Kitazawa, Shoji Yonebayashi, Yumiko Maehara, Zi-Xuan Wang, Yuzo Minobe
Cold tolerance at the seedling stage (CTSS) is an important trait affecting stable rice production in temperate climates and areas of high elevation. In this study, 331 single nucleotide polymorphism (SNP) markers were developed and used along with phenotypic evaluation to identify quantitative trait loci (QTLs) associated with CTSS from a mapping population of 184 F(2) plants derived from a cold tolerant wild rice, W1943 (Oryza rufipogon), and a sensitive indica cultivar, Guang-lu-ai 4 (GLA4). Three QTLs were detected on chromosomes 3, 10 and 11...
July 2010: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/20230488/repeat-subtraction-mediated-sequence-capture-from-a-complex-genome
#14
Yan Fu, Nathan M Springer, Daniel J Gerhardt, Kai Ying, Cheng-Ting Yeh, Wei Wu, Ruth Swanson-Wagner, Mark D'Ascenzo, Tracy Millard, Lindsay Freeberg, Natsuyo Aoyama, Jacob Kitzman, Daniel Burgess, Todd Richmond, Thomas J Albert, W Brad Barbazuk, Jeffrey A Jeddeloh, Patrick S Schnable
Sequence capture technologies, pioneered in mammalian genomes, enable the resequencing of targeted genomic regions. Most capture protocols require blocking DNA, the production of which in large quantities can prove challenging. A blocker-free, two-stage capture protocol was developed using NimbleGen arrays. The first capture depletes the library of repetitive sequences, while the second enriches for target loci. This strategy was used to resequence non-repetitive portions of an approximately 2.2 Mb chromosomal interval and a set of 43 genes dispersed in the 2...
June 1, 2010: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/19679362/next-generation-sequencing-technologies-and-their-implications-for-crop-genetics-and-breeding
#15
REVIEW
Rajeev K Varshney, Spurthi N Nayak, Gregory D May, Scott A Jackson
Using next-generation sequencing technologies it is possible to resequence entire plant genomes or sample entire transcriptomes more efficiently and economically and in greater depth than ever before. Rather than sequencing individual genomes, we envision the sequencing of hundreds or even thousands of related genomes to sample genetic diversity within and between germplasm pools. Identification and tracking of genetic variation are now so efficient and precise that thousands of variants can be tracked within large populations...
September 2009: Trends in Biotechnology
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