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Sunday, October 25, 2020

AGBT Conference: Automated de novo genome assemblies and bacterial epigenomes using PacBio sequencing

In this AGBT plenary talk, Jonas Korlach presented a number of collaborative studies between PacBio and other institutions to make use of highly accurate, long-read sequence data, which has led to a revival of finished genomes. Examples from the infectious disease or pathogen realm included Pertussis, Salmonella, and Listeria, all of which now have closed genomes from PacBio-generated data. Korlach also reported on epigenomic information in Salmonella and Listeria, indicating potential new forms of DNA modifications.

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Sunday, October 25, 2020

AGBT Conference: Automated, non-hybrid de novo genome assemblies and epigenomes of bacterial pathogens

Jonas Korlach, CSO of PacBio, discusses the revival of finished genomes the microbial community will see with long read data, emphasizing that for certain organisms such as rapidly evolving microbes, having a de novo finished genome will be more useful than creating a draft based on a previous related reference genome. Korlach describes two bioinformatic methods from PacBio, a hierarchical genome assembly process (HGAP) and an consensus caller (Quiver), which are used to generate finished genomes from just long-read PacBio data, with final genome sequence accuracies over 99.999%. Korlach demonstrates the ability of PacBio data to generate closed, high-quality de…

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Sunday, October 25, 2020

PAG Conference: Long reads sequencing technology to solve complex genomic regions assembly in plants

Hélène Berges, managing director of the Plant Genomic Center at the Institut National de la Recherche Agronomique (INRA) in Toulouse, France, discusses how obtaining accurate and reliable sequence data is still challenging when targeting specific genomic regions. These issues are even more noticeable for complex plant genomes. To overcome these issues, Dr. Berges and her team have developed a strategy to reduce the genome complexity by using the large insert BAC libraries combined with next-generation sequencing technologies. She compares different technologies to sequence pools of BAC clones from several species (maize, wheat, strawberry, barley, sugarcane, and sunflower) known to be…

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Sunday, October 25, 2020

i5K Webinar: High-quality de novo insect genome assemblies using PacBio sequencing

PacBio Sequencing is characterized by very long sequence reads (averaging > 10,000 bases), lack of GC-bias, and high consensus accuracy. These features have allowed the method to provide a new gold standard in de novo genome assemblies, producing highly contiguous (contig N50 > 1 Mb) and accurate (> QV 50) genome assemblies. We will briefly describe the technology and then highlight the full workflow, from sample preparation through sequencing to data analysis, on examples of insect genome assemblies, and illustrate the difference these high-quality genomes represent with regard to biological insights, compared to fragmented draft assemblies generated by short-read sequencing.

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Sunday, October 25, 2020

Tutorial: HGAP4 de novo assembly application [SMRT Link v5.0.0]

This tutorial provides an overview of the Hierarchical Genome Assembly Process (HGAP4) de novo assembly analysis application. HGAP4 generates accurate de novo assemblies using only PacBio data. HGAP4 is suitable for assembling a wide range of genome sizes and complexity. HGAP4 now includes some support for diploid-aware assembly. This tutorial covers features of SMRT Link v5.0.0.

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Sunday, October 25, 2020

PAG PacBio Workshop: SMRT Sequencing for complete genomes

PacBio CSO Jonas Korlach kicks off the PAG 2017 SMRT Sequencing workshop with acknowledgement of the remarkable work scientists have done with long-read sequencing technology, culminating in more than 2,000 papers so far. Also: Sequel System data, new chemistry and software release, longer libraries, and more.

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Sunday, October 25, 2020

Webinar: Beginner’s guide to PacBio SMRT Sequencing data analysis

PacBio SMRT Sequencing is fast changing the genomics space with its long reads and high consensus sequence accuracy, providing the most comprehensive view of the genome and transcriptome. In this webinar, I will talk about the various data analysis tools available in PacBio’s data analysis suite – SMRT Link – as well as 3rd party tools available. Key applications addressed in this talk are: Genome Assemblies, Structural Variant Analysis, Long Amplicon and Targeted Sequencing, Barcoding Strategies, Iso-Seq Analysis for Full-length Transcript Sequencing

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Sunday, October 25, 2020

PAG Conference: Using cattle subspecies crosses to explore chromosome of origin expression through Iso-seq analysis

In this PAG 2018 presentation, John Williams of University of Adelaide, presents research on using PacBio SMRT Sequencing to explore the genetic origins of cattle subspecies, Angus (Bos taurus taurus) and Brahman (Bos taurus indicus). He shares RNA sequencing data using the PacBio Iso-Seq method to compare transcriptomes and phase allelic expression and describes how the IsoPhase technique enables evaluation of SNPs through transcriptome mapping back to the single genome of a cross-bred individual. Using a genomic and transcriptomic approach, two high-quality genomes from a single individual and gene isoforms specific to each subspecies are being identified.

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Sunday, October 25, 2020

PAG Conference: Long-read sequencing reveals complex genomic architecture in independent carnivorous plant lineages

In this PAG 2018 presentation, Tanya Renner of Pennsylvania State University shares research using PacBio SMRT Sequencing to understand the genomes and transcriptomes of carnivorous plants. She describes the humped bladderwort, Utricularia gibba, as having an extreme genome due to its small size (100 Mbp) despite containing numerous tandem gene duplications and having undergone two whole genome duplications. Renner shares ongoing research into two Drosera species, commonly known as sundews, which through whole genome sequencing are illuminating carnivorous plant genome structural evolution including the transition from monocentric to holocentric chromosomes.

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Sunday, October 25, 2020

Webinar: A sketch of assembly recipes for PacBio data

This webinar, presented by Nisha Pillai, provides an overview of bioinformatics approaches for PacBio Single Molecule, Real-Time (SMRT) Sequencing data and discusses the whole genome sequencing application including: assembly workflow designs, an overview analysis tools for de novo assembly of SMRT Sequencing data (HGAP4, FALCON & FALCON-Unzip), and finally best practices and case studies.

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Sunday, October 25, 2020

Educational Video: Step 2 – de novo assembly of a genome

This video provides an overview of the techniques and steps of generating a de novo genome assembly with long-read sequencing data generated using PacBio Single Molecule, Real-Time (SMRT) Sequencing. In this video, a PacBio scientist covers the benefits of long reads when generating high-quality genome assemblies, the latest tools for creating assemblies, including HGAP, FALCON and FALCON-Unzip, how to polish and assess the quality of a genome assembly, and how to submit an assembly to NCBI.

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