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. 2017 May 17:8:826.
doi: 10.3389/fpls.2017.00826. eCollection 2017.

How Single Molecule Real-Time Sequencing and Haplotype Phasing Have Enabled Reference-Grade Diploid Genome Assembly of Wine Grapes

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How Single Molecule Real-Time Sequencing and Haplotype Phasing Have Enabled Reference-Grade Diploid Genome Assembly of Wine Grapes

Andrea Minio et al. Front Plant Sci. .
No abstract available

Keywords: cabernet sauvignon; comparative genomics; grape pan-genome; heterozygosity; inbreeding depression.

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Figures

Figure 1
Figure 1
Comparison of conventional assemblers and their application to the grapevine genome using FALCON-Unzip and its results on Cabernet Sauvignon. (A) A diagram comparing how conventional assemblers and FALCON-Unzip resolve homozygous and heterozygous regions of diploid genomes. (B) Comparison of sequence length distribution between the primary contigs of Cabernet Sauvignon assembled with FALCON-Unzip and other Vitis vinifera genome contig and scaffold assemblies. (C) Distribution of sequence identity between RNAseq reads and reference when mapping is done only on primary contigs or on a combination of primary contigs and haplotigs. (D) Shared coding genes sequences between Cabernet Sauvignon haplotypes and PN40024. Predicted coding sequences from the Cabernet Sauvignon primary contigs were aligned using GMAP (Wu and Watanabe, 2005) to the Cabernet Sauvignon haplotigs and the PN40024 chromosomes to identify the shared part of the represented gene space. Only alignments with identity ≥80% and coverage ≥66% were considered. In similar fashion, coding sequences from the Cabernet Sauvignon haplotigs were aligned against the primary contigs and the PN40024 chromosomes, and coding sequences from PN40024 were aligned against both primary contigs and haplotigs of Cabernet Sauvignon.

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