HIFI-SE

HIFI-SE assembles full-length cytochrome c oxidase subunit I (COI) DNA barcodes from MGISEQ-2000 SE400 single-end 400 bp sequencing data for high-throughput species identification.

Key Features:

• Read Length Utilization: Leverages MGISEQ-2000 SE400 single-end 400 bp reads to cover the full COI barcode region, exceeding Illumina MiSeq 300 bp read-length limits.
• Bioinformatic Pipeline: Implements four Python modules—filter, assign, assembly, and taxonomy—to process sequencing data.
• Full-Length Barcode Assembly: Assembles reads from both the 5' and 3' ends of the COI barcode into complete sequences.
• High Accuracy and Sensitivity: In a study of 845 samples (marine invertebrates and insects) it assembled 747 full-length COI barcodes and matched Sanger results for 71 of 72 compared samples.
• Cost-Effectiveness: Optimizes sequencing resource use to reduce per-barcode cost compared with traditional approaches.

Scientific Applications:

• Biodiversity Assessment: Generates COI barcodes for large-scale biodiversity surveys.
• Species Identification: Provides high-throughput species identification via full-length COI barcodes.
• Morphological Classification Support: Supplies molecular COI barcodes to support morphological classification.
• New Species Description: Facilitates description of new species through accurate COI barcode sequences.
• Ecological and Evolutionary Studies: Enables large-scale ecological and evolutionary analyses requiring extensive barcode datasets.

Methodology:

The pipeline comprises four computational modules—filter, assign, assembly, and taxonomy—implemented in Python, and assembles 5' and 3' reads into full-length COI sequences.