Genetic architecture of sugarcane traits in a polyploid genomics framework - PubMed
2 hours ago
- #Sugarcane genomics
- #Crop improvement
- #Polyploid genetics
- A fully phased genome assembly of sugarcane cultivar POJ2878 resolved 118 chromosomes, revealing subgenome recombination and chromosomal rearrangements.
- Breeder-favored haplotypes were identified, including a SUS2 haplotype linked to enhanced sucrose content.
- Resequencing of 981 Saccharum accessions traced POJ2878's impact on modern cultivars and identified domestication and improvement sweeps.
- Key genes under selection include CBL1 (cold tolerance), TIP1 (cell size regulation), and TB1 (tillering control).
- A polyploid-tailored genome-wide association study identified loci for parenchyma cell size and sucrose storage, validating sucrose transporter SUT2.