Autor(es):Mostrar menos -

Martins, Monica Leticia Turibio ; Sforca, Danilo Augusto ; dos Santos, Luis Paulo ; Pimenta, Ricardo Jose Gonzaga ; Mancini, Melina Cristina ; Aono, Alexandre Hild ; Cardoso-Silva, Claudio Benicio ; Vautrin, Sonia ; Bellec, Arnaud ; dos Santos, Renato Vicentini ; Berges, Helene ; da Silva, Carla Cristina ; de Souza, Anete Pereira

• Tipo de documento: Artigo Científico
• Fonte: BMC Genomics; v. 25, n. 1, p. 18-pg., 2024-12-18.

Resumo

BackgroundElucidating the intricacies of the sugarcane genome is essential for breeding superior cultivars. This economically important crop originates from hybridizations of highly polyploid Saccharum species. However, the large size (10 Gb), high degree of polyploidy, and aneuploidy of the sugarcane genome pose significant challenges to complete genome sequencing, assembly, and annotation. One successful strategy for identifying candidate genes linked to agronomic traits, particularly those associated with sugar accumulation, leverages synteny and potential collinearity with related species.ResultsIn this study, we explored synteny between sorghum and sugarcane. Genes from a sorghum Brix QTL were used to screen bacterial artificial chromosome (BAC) libraries from two Brazilian sugarcane varieties (IACSP93-3046 and SP80-3280). The entire region was successfully recovered, confirming synteny and collinearity between the species. Manual annotation identified 51 genes in the hybrid varieties that were subsequently confirmed to be present in Saccharum spontaneum. This study employed a multifaceted approach to identify candidate genes for sugar accumulation, including retrieving the genomic region of interest, performing a gene-by-gene analysis, analyzing RNA-seq data for internodes from Saccharumofficinarum and S. spontaneum accessions, constructing a coexpression network to examine the expression patterns of genes within the studied region and their neighbors, and finally identifying differentially expressed genes (DEGs).ConclusionsThis comprehensive approach led to the discovery of three candidate genes potentially involved in sugar accumulation: an ethylene-responsive transcription factor (ERF), an ABA 8'-hydroxylase, and a prolyl oligopeptidase (POP). These findings could be valuable for identifying additional candidate genes for other important agricultural traits and directly targeting candidate genes for further work in molecular breeding. (AU)

• Processo FAPESP: 19/03232-6 - Seleção genômica ampla em cana-de-açúcar via aprendizado de máquina e redes complexas para caracteres de importância econômica
• Beneficiário: Alexandre Hild Aono
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 17/18225-0 - Identificação e caracterização de uma região genômica de cana-de-açúcar utilizando um QTL para Brix em sorgo
• Beneficiário: Luís Paulo dos Santos
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 19/21682-9 - Mapeamento associativo e transcriptômica na investigação da resistência da cana-de-açúcar ao vírus do amarelecimento foliar
• Beneficiário: Ricardo José Gonzaga Pimenta
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto