Multi-omics integration reveals candidate genes and molecular mechanisms associated with resistance to sugarcane smut

Sugarcane smut, a fungal disease caused by Sporisorium scitamineum, poses a significant threat to sugarcane crops, potentially resulting in substantial yield reductions. As traditional breeding methods struggle with the genetic complexity of sugarcane varieties, researchers have turned to molecular and omics approaches to better understand the genetic underpinnings of disease resistance.

To explore sugarcane's resistance to smut, scientists conducted a study involving a panel of 155 genotypes, each genotyped with 33,335 SNP markers and subsequently inoculated with S. scitamineum. This experimental setup yielded three distinct phenotypic variables, which were subsequently subjected to genome-wide association analyses to uncover marker-trait associations.

Furthermore, transcriptomic analyses were carried out using data from four existing studies examining sugarcane's response to smut. By integrating these multi-omics datasets, researchers were able to identify candidate genes implicated in various biological processes, including structural reinforcement, immune signaling, redox homeostasis, genome maintenance, and cellular adaptation.

These findings present valuable molecular resources for the functional validation and development of breeding strategies aimed at creating sugarcane cultivars with improved resistance to sugarcane smut.