Long Noncoding RNA Ef-cd Promotes Maturity Without Yield Penalty in Rice
Received date: 2019-08-20
Accepted date: 2019-08-24
Online published: 2019-08-27
In rice breeding, ‘high yielding’ and ‘early maturing’ are negative-reciprocally regulated traits. A recent study identified a major maturity duration regulatory gene, Early flowering-completely dominant (Ef-cd), which encodes a long noncoding RNA. Ef-cd IncRNA overlaps with the antisense transcript of the OsSOC1 gene. Ef-cd positively regulates the expression of OsSOC1 and H3K36me3 deposition. Varieties and their derivatived hybrids harboring Ef-cd allele show 7-20 d early-maturation compared to their respective wild types at different latitudes, but without a concomitant yield penalty. Moreover, among 1 439 elite hybrid rice varieties, all of the hybrid cultivars with homozygous or heterozygous Ef-cd alleles mature significantly earlier. The mechanism of Ef-cd-promoted maturity without yield penalty is attributed to its facilitating nitrogen utilization and improving photosynthesis. Thus, Ef-cd may balance early maturating with stable grain yield, and can be used for molecular design breeding in rice.
Key words： rice; lncRNA; heading date; yield
Shuo Zhang, Changyin Wu . Long Noncoding RNA Ef-cd Promotes Maturity Without Yield Penalty in Rice[J]. Chinese Bulletin of Botany, 2019 , 54(5) : 550 -553 . DOI: 10.11983/CBB19163
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