Cited by 338Genetic Mapping and Diversity in Plants and AnimalsGenomics and Phylogenetic StudiesChromosomal and Genetic Variations

Single nucleotide polymorphism (SNP) discovery in the polyploid Brassica napus using Solexa transcriptome sequencing

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Trick, Martin, Long, Yan, Meng, Jinling, Bancroft, Ian·2009·Plant Biotechnology Journal

Abstract

Summary: Oilseed rape (Brassica napus) was selected as an example of a polyploid crop, and the Solexa sequencing system was used to generate approximately 20 million expressed sequence tags (ESTs) from each of two cultivars: Tapidor and Ningyou 7. A methodology and computational tools were developed to exploit, as a reference sequence, a publicly available set of approximately 94 000 Brassica species unigenes. Sequences transcribed in the leaves of juvenile plants were aligned to approximately 26 Mb of the reference sequences. The aligned sequences enabled the detection of 23 330–41 593 putative single nucleotide polymorphisms (SNPs) between the cultivars, depending on the read depth stringency applied. The majority of the detected polymorphisms (87.5–91.2%) were of a type indicative of transcription from homoeologous genes from the two parental genomes within oilseed rape, and are termed here ‘hemi‐SNPs’. The overall estimated polymorphism rate (~0.047%–0.084%) is consistent with that previously observed between the cultivars analysed. To demonstrate the heritability of SNPs and to assess their suitability for applications such as linkage map construction and association genetics, approximately nine million ESTs were generated, using the Solexa system, from each of four lines of a doubled haploid mapping population derived from a cross between Tapidor and Ningyou 7. Computational tools were developed to score the alleles present in these lines for each of the potential SNPs identified between their parents. For a specimen region of the genome analysed in detail, segregation of alleles largely, although not entirely, followed the pattern expected for genomic markers.

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Crossref · 10.1111/j.1467-7652.2008.00396.x

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  • Over the last two years, Illumina transcriptome or whole genome de novo sequencing and assembly have been successfully used for model and non-model organisms.

    “Over the last two years, with the further confirmation that the relatively short reads can be effectively assembled [15], especially with the great advantage of paired-end sequencing [54], the Illumina transcriptome or whole genome de novo sequencing and assembly have been successfully used for model [12,16,55-58]and non-model organisms [25-27,59].”

    From De novo assembly and characterization of root transcriptome using Illumina paired-end sequencing and development of cSSR markers in sweetpotato (Ipomoea batatas) (2010) · cites this paper as [12]

    The Solexa sequencing and validation sections show successful Illumina transcriptome sequencing in Brassica napus, supporting its use as an example involving a non-model organism. But the Alignment of ESTs to reference sequences and SNP calling using MAQ sections say the reads were mapped to previously assembled Brassica unigenes; the paper does not demonstrate de novo assembly of the Illumina reads. Page numbers are unavailable in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Large collections of ESTs have proven invaluable for functional genomics and molecular marker development.

    “Furthermore, large collections of ESTs have proven invaluable for functional genomics and molecular marker development [9-13].”

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Authors
Trick, M., Long, Y., Meng, J., & Bancroft, I.
Affiliations
  • John Innes Centre (GB)
  • Huazhong Agricultural University (CN)
Corresponding author
Bancroft, Ian
Venue
Plant Biotechnology Journal
Publisher
Wiley
Published
2009-04-13
Volume
7
Issue
4
Pages
334-346
ISSN
  • 1467-7644 (ISSN-L)
  • 1467-7652
OpenAlex
W2086338036
Cited by
338
References
26
Citations by year
2026: 3 · 2025: 3 · 2024: 6 · 2023: 6 · 2022: 8 · 2021: 10 · 2020: 20 · 2019: 11 · 2018: 16 · 2017: 22 · 2016: 27 · 2015: 34 · 2014: 44 · 2013: 31 · 2012: 44
FWCI
18.46
Type
journal article
Language
en
Open access
Locations
  • Plant Biotechnology Journal (publishedVersion, public-domain)
  • PubMed (publishedVersion)
Funders
  • Directorate for Biological Sciences
  • Biotechnology and Biological Sciences Research Council (BB/E017363, BB/E017363/1)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
Keywords
single nucleotide polymorphisms, Brassica napus, oilseed rape, polyploidy, homoeologous genes, expressed sequence tags, Illumina sequencing, SNP discovery, doubled haploid mapping population, allele segregation, linkage mapping, genetic association studies, polymorphism rate
MeSH terms
Alleles, Chromosome Mapping, Polyploidy, Software, Sequence Alignment, Sequence Analysis, DNA, Plant Leaves, Genome, Plant, RNA, Plant, Computational Biology, Expressed Sequence Tags, Polymorphism, Single Nucleotide, Gene Expression Profiling, Brassica napus

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