Control of grain size, shape and quality by OsSPL16 in rice.
Grain size and shape are important components of grain yield and quality and have been under selection since cereals were first domesticated. Here, we show that a quantitative trait locus GW8 is synonymous with OsSPL16, which encodes a protein that is a positive regulator of cell proliferation. Higher expression of this gene promotes cell division and grain filling, with positive consequences for grain width and yield in rice. Conversely, a loss-of-function mutation in Basmati rice is associated with the formation of a more slender grain and better quality of appearance. The correlation between grain size and allelic variation at the GW8 locus suggests that mutations within the promoter region were likely selected in rice breeding programs. We also show that a marker-assisted strategy targeted at elite alleles of GS3 and OsSPL16 underlying grain size and shape can be effectively used to simultaneously improve grain quality and yield.
The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, National Centre for Plant Gene Research, Beijing, China.
Shaokui
S
Wang
Kun
K
Wu
Qingbo
Q
Yuan
Xueying
X
Liu
Zhengbin
Z
Liu
Xiaoyan
X
Lin
Ruizhen
R
Zeng
Haitao
H
Zhu
Guojun
G
Dong
Qian
Q
Qian
Guiquan
G
Zhang
Xiangdong
X
Fu
D000595:Amino Acid Sequence; D001483:Base Sequence; D002874:Chromosome Mapping; D018744:DNA, Plant / Q000235:genetics; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D008969:Molecular Sequence Data; D009154:Mutation; D012275:Oryza / Q000235:genetics* / Q000254:growth & development*; D010940:Plant Proteins / Q000235:genetics; D030821:Plants, Genetically Modified; D040641:Quantitative Trait Loci; D017386:Sequence Homology, Amino Acid
D018744:DNA, Plant; D010940:Plant Proteins