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H3K36me3 ChIP-seq of 2 rice lines D248 and SH881

ABSTRACT: A major maturity duration-regulatory gene, Early flowering-completely dominant (Ef-cd) was cloning in this study. The Ef-cd locus gives rise to a long noncoding RNA (lncRNA) antisense transcript overlapping the OsSOC1 gene. Ef-cd lncRNA expression positively correlates with the expression of OsSOC1 and H3K36me3 deposition.

ORGANISM(S): Oryza sativa

PROVIDER: GSE134021 | GEO | 2019/07/10

REPOSITORIES: GEO

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Ef-cd locus shortens rice maturity duration without yield penalty

Project description:The contradiction between ‘high-yielding’ and ‘early-maturing’ hampers further improvement on annual rice yield. Here we reported the positional cloning of a major maturity duration-regulatory gene, Early flowering-completely dominant (Ef-cd), and demonstrated that natural variation in Ef-cd could be used to overcome the above contradictory. The Ef-cd locus gives rise to a long noncoding RNA (lncRNA) antisense transcript overlapping the OsSOC1 gene. Ef-cd lncRNA expression positively correlates with the expression of OsSOC1 and H3K36me3 deposition. Field test comparisons of early-maturing Ef-cd near-isogenic lines (NILs) with their wild types as well as the derivative early-maturing hybrids with their wild-type hybrids conducted under different latitudes determined that early-maturing Ef-cd allele shortens maturity duration (ranging from 7 to 20 days) without a concomitant yield penalty. Ef-cd facilitates nitrogen utilization and also improves the photosynthesis rate. Analysis of 1,439 elite hybrid rice varieties revealed that the 16 homozygotes and 299 heterozygotes possessing Ef-cd matured significantly earlier. Therefore, Ef-cd could be a vital contributor of elite early-maturing hybrid varieties in balancing grain yield with maturity duration.

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