Epigenomics Aids Trait Unlocking in Polyploid Crop Breeding

Biomarker Technologies (BMKGene) is emphasizing the potential of epigenomics in the breeding of polyploid crops such as wheat, cotton, and potato. These plants, possessing three or more complete sets of chromosomes, present significant genetic challenges. Traditional breeding methods, relying on DNA sequences and SNP genotyping, often fail to fully explain phenotypic differences in traits like drought tolerance or yield.

Epigenetics provides an additional layer of gene regulation by influencing gene expression without changing the underlying DNA sequence. BMKGene suggests that epigenomic information can lead to a deeper understanding of subgenome dominance, the activation of dormant genes, and the stabilization of newly formed polyploid genomes. Key epigenetic mechanisms include DNA methylation, histone modifications, and small RNA-directed DNA methylation.

The company stresses the importance of selecting appropriate epigenomic assay technologies for studying polyploid crops. BMKGene compares methods such as Enzymatic Methyl-Seq (EM-Seq), Whole-Genome Bisulfite Sequencing (WGBS), CUT&Tag/CUT&RUN, and ATAC-Seq. These technologies offer different resolutions and are suited for identifying various epigenetic marks, which is crucial for complex plant genomes.

As a case in point, research on allotetraploid cotton ( Gossypium hirsutum) is mentioned, where scientists analyzed subgenome crosstalk. Understanding epigenetic regulation can help elucidate agronomically important plant traits. BMKGene offers tools and services to support plant research and advance the development of more efficient and resilient crops.