Genome-wide analysis of Udai21: Unraveling the genetic basis of superior eating quality in rice
Hiroki Ikeda, Masatsugu Tamura, Takayuki Ohnishi, Kenta Shirasawa
TL;DR
This study identifies the genetic makeup of Udai21 rice, a variety known for its excellent eating quality, and finds it has a hybrid origin combining japonica and aus rice.
Contribution
The paper provides a curated genome resource and candidate genes for superior eating quality in Udai21 rice.
Findings
Udai21 rice has a hybrid origin with aus maternal and japonica paternal contributions.
Introgressed aus-derived segments are found on several chromosomes in Udai21.
1,017 genes with high- or moderate-impact variants were identified, linked to grain quality and starch metabolism.
Abstract
Rice (Oryza sativa L.) is a staple for more than half of the world’s population, and grain quality strongly influences consumer preference and market value. Udai21, also referred to as Ohkome21, and previously designated as Yudai21, is a Japanese japonica cultivar noted for excellent eating quality and storage performance, yet its breeding origin and genomic basis remain unclear. Here, we aimed to resolve the genomic composition and likely parental origins of Udai21, and to identify candidate genes related to its distinctive quality traits. We generated a chromosome-scale assembly using PacBio HiFi long reads and assessed within-cultivar uniformity by sampling two breeder-maintained lines. We then profiled population structure using double digest restriction-site associated DNA sequencing together with representative accessions and conducted whole-genome resequencing and organelle…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
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Taxonomy
TopicsGenetic Mapping and Diversity in Plants and Animals · Food composition and properties · Rice Cultivation and Yield Improvement