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Pacific Biosciences is committed to providing high-quality products that meet customer expectations and comply with regulations. We will achieve these goals by adhering to and maintaining an effective quality-management system designed to ensure product quality, performance, and safety.

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Friday, September 18, 2020

Webinar: Beyond a single reference genome – The advantages of sequencing multiple individuals

Hear how scientists have used PacBio sequencing to develop pangenome collections and to study population genetics of plant and animal species to power their research. Learn about the advantages of sequencing multiple individuals to gain comprehensive views of genetic variation, and understand the speed, cost, and accuracy benefits of using highly accurate long reads (HiFi reads) to sequence your species of interest.

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Thursday, August 27, 2020

Case Study: Scientists create gold standard plant and animal genomes with SMRT Sequencing

From crop improvement to breeding healthier livestock to modeling human disease, scientists are using PacBio Sequencing to advance understanding of plant and animal genomes. In this article, we look at four examples of plant and animal genome references improved or made possible with SMRT Sequencing, including an early example of transcriptome sequencing of a chicken for improved annotation. These examples highlight insights gained with SMRT Sequencing that are missed with short-read data, such as complex regions or novel genes.

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Thursday, August 27, 2020

Case Study: With SMRT Sequencing for genomes, transcriptomes, and epigenomes, scientists are overcoming barriers in plant and animal research

Scientists are utilizing long-read PacBio sequencing to provide uniquely comprehensive views of complex plant and animal genomes. These efforts are uncovering novel biological mechanisms, enabling progress in crop development, and much more. To date, scientists have published over 1000 papers with Single Molecule, Real-Time (SMRT) Sequencing, many covering breakthroughs in the plant and animal sciences. In this case study, we look at examples in model organisms Drosophila and C. elegans and non-model organisms coffee, Oropeitum, danshen, and sugarbeet, where SMRT Sequencing has contributed to a more accurate understanding of biology. These efforts underscore the broad applicability of long-read sequencing in…

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Thursday, August 27, 2020

Case Study: Pioneering a pan-genome reference collection

At DuPont Pioneer, DNA sequencing is paramount for R&D to reveal the genetic basis for traits of interest in commercial crops such as maize, soybean, sorghum, sunflower, alfalfa, canola, wheat, rice, and others. They cannot afford to wait the years it has historically taken for high-quality reference genomes to be produced. Nor can they rely on a single reference to represent the genetic diversity in its germplasm.

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Tuesday, April 21, 2020

The bracteatus pineapple genome and domestication of clonally propagated crops.

Domestication of clonally propagated crops such as pineapple from South America was hypothesized to be a ‘one-step operation’. We sequenced the genome of Ananas comosus var. bracteatus CB5 and assembled 513?Mb into 25 chromosomes with 29,412 genes. Comparison of the genomes of CB5, F153 and MD2 elucidated the genomic basis of fiber production, color formation, sugar accumulation and fruit maturation. We also resequenced 89 Ananas genomes. Cultivars ‘Smooth Cayenne’ and ‘Queen’ exhibited ancient and recent admixture, while ‘Singapore Spanish’ supported a one-step operation of domestication. We identified 25 selective sweeps, including a strong sweep containing a pair of tandemly duplicated…

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Tuesday, April 21, 2020

Construction and comparison of three reference-quality genome assemblies for soybean.

We report reference-quality genome assemblies and annotations for two accessions of soybean (Glycine max) and one of Glycine soja, the closest wild relative of G. max. The G. max assemblies are for widely used U.S. cultivars: the northern line ‘Williams 82’ (Wm82); and the southern line ‘Lee’. The Wm82 assembly improves the prior published assembly, and the Lee and G. soja assemblies are new for these accessions. Comparisons among the three accessions show generally high structural conservation, but nucleotide difference of 1.7 SNPs/kb between Wm82 and Lee, and 4.7 SNPs/kb between these lines and G. soja. SNP distributions and comparisons…

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Tuesday, April 21, 2020

Chlorella vulgaris genome assembly and annotation reveals the molecular basis for metabolic acclimation to high light conditions.

Chlorella vulgaris is a fast-growing fresh-water microalga cultivated at the industrial scale for applications ranging from food to biofuel production. To advance our understanding of its biology and to establish genetics tools for biotechnological manipulation, we sequenced the nuclear and organelle genomes of Chlorella vulgaris 211/11P by combining next generation sequencing and optical mapping of isolated DNA molecules. This hybrid approach allowed to assemble the nuclear genome in 14 pseudo-molecules with an N50 of 2.8 Mb and 98.9% of scaffolded genome. The integration of RNA-seq data obtained at two different irradiances of growth (high light-HL versus low light -LL) enabled…

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Tuesday, April 21, 2020

Rapid evolution of a-gliadin gene family revealed by analyzing Gli-2 locus regions of wild emmer wheat.

a-Gliadins are a major group of gluten proteins in wheat flour that contribute to the end-use properties for food processing and contain major immunogenic epitopes that can cause serious health-related issues including celiac disease (CD). a-Gliadins are also the youngest group of gluten proteins and are encoded by a large gene family. The majority of the gene family members evolved independently in the A, B, and D genomes of different wheat species after their separation from a common ancestral species. To gain insights into the origin and evolution of these complex genes, the genomic regions of the Gli-2 loci encoding…

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Tuesday, April 21, 2020

The Chinese chestnut genome: a reference for species restoration

Forest tree species are increasingly subject to severe mortalities from exotic pests, diseases, and invasive organisms, accelerated by climate change. Forest health issues are threatening multiple species and ecosystem sustainability globally. While sources of resistance may be available in related species, or among surviving trees, introgression of resistance genes into threatened tree species in reasonable time frames requires genome-wide breeding tools. Asian species of chestnut (Castanea spp.) are being employed as donors of disease resistance genes to restore native chestnut species in North America and Europe. To aid in the restoration of threatened chestnut species, we present the assembly of…

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