Download Data/hora: 06/05/2017 10:02:26 Biblioteca(s): Embrapa Informática

Data/hora: 08/06/2017 17:10:49
Biblioteca(s): Embrapa Informática Agropecuária.
Data corrente: 20/01/2015
Data da última atualização: 20/01/2015
Autoria: CRATIVOL, C.; REGULSKI, M.; BERTALAN, M.; MCCOMBIE, W. R.; SILVA, F. R.
da; ZERLOTINI NETO, A.; VICENTINI, R.; FARINELLI, L.; HEMERLY, A. S.;
MARTIENSSEN, R. A.; FERREIRA, P. C. G.
Afiliação: CLÍCIA GRATIVOL, UFRJ; MICHAEL REGULSKI, Cold Spring Harbor Laboratory;
MARCELO BERTALAN, Institute of Biological Psychiatry, Mental Health Center; W.
RICHARD MCCOMBIE, Cold Spring Harbor Laboratory; FELIPE RODRIGUES DA
SILVA, CNPTIA; ADHEMAR ZERLOTINI NETO, CNPTIA; RENATO VICENTINI,
CBMEG/Unicamp; LAURENT FARINELLI, Fasteris SA; ADRIANA SILVA
HEMERLY, UFRJ; ROBERT A. MARTIENSSEN, Cold Spring Harbor Laboratory;
PAULO CAVALCANTI GOMES FERREIRA, UFRJ.
Título: Sugarcane genome sequencing by methylation filtration provides tools for genomic
research in the genus Saccharum.
Ano de publicação: 2014
Fonte/Imprenta: The Plant Journal, Oxford, v. 79, n. 1, p. 162-172, 2014.
DOI: 10.1111/tpj.12539
Idioma: Inglês
Conteúdo: Many economically important crops have large and complex genomes that hamper their
sequencing by standard methods such as whole genome shotgun (WGS). Large tracts of
methylated repeats occur in plant genomes that are interspersed by hypomethylated
gene-rich regions. Gene-enrichment strategies based on methylation profiles offer an
alternative to sequencing repetitive genomes. Here, we have applied methyl filtration with
McrBC endonuclease digestion to enrich for euchromatic regions in the sugarcane
genome. To verify the efficiency of methylation filtration and the assembly quality of
sequences submitted to gene-enrichment strategy, we have compared assemblies using
methyl-filtered (MF) and unfiltered (UF) libraries. The use of methy filtration allowed a
better assembly by filtering out 35% of the sugarcane genome and by producing 1.53
more scaffolds and 1.73 more assembled Mb in length compared with unfiltered dataset.
The coverage of sorghum coding sequences (CDS) by MF scaffolds was at least 36%
higher than by the use of UF scaffolds. Using MF technology, we increased by 1343 the
coverage of gene regions of the monoploid sugarcane genome. The MF reads assembled
into scaffolds that covered all genes of the sugarcane bacterial artificial chromosomes
(BACs), 97.2% of sugarcane expressed sequence tags (ESTs), 92.7% of sugarcane
RNA-seq reads and 98.4% of sorghum protein sequences. Analysis of MF scaffolds from
encoded enzymes of the sucrose/starch pathway discovered 291 single-nucleotide
polymorphisms (SNPs) in the wild sugarcane species, S. spontaneum and S. officinarum.
A large number of microRNA genes was also identified in the MF scaffolds. The
information achieved by the MF dataset provides a valuable tool for genomic research in
the genus Saccharum and for improvement of sugarcane as a biofuel crop.
Palavras-Chave: Cana-de-açúcar; De novo assembly; Gene-rich regions; Metilação.
Thesaurus NAL: Methylation; Saccharum; Sugarcane.
Categoria do assunto: -Registro original: Embrapa Informática Agropecuária (CNPTIA)
Exemplares: CNPTIA - (18222-1) - UPC - AP - DD - - - - DIS