Natural variation in the promoter of TGW2 determines grain width and weight in rice

• DOI: 10.1111/nph.16540
• Publication Date: 2020-03-13T15:33:06Z
• Authors: Banpu Ruan; Lianguang Shang; Bin Zhang; Jiang Hu; Yuexing Wang; Hai Lin; Anpeng Zhang; Chaolei Liu; Youlin Peng; Li Zhu; Deyong Ren; Lan Shen; Guojun Dong; Guangheng Zhang; Dali Zeng; Longbiao Guo; Qian Qian; Zhenyu Gao
• Keywords: Trait

Understanding the genetic basis of natural variation in grain size among diverse rice varieties can help breeders develop high-yielding cultivars. Here, we report discovery qTGW2, a new semidominant quantitative trait locus for width and weight. The corresponding gene, TGW2, encodes CELL NUMBER REGULATOR 1 (OsCNR1) localized to plasma membrane. A single nucleotide polymorphism (SNP) 1818 bp upstream TGW2 is responsible its different expression, leading alteration weight by influencing cell proliferation expansion glumes. interacts with KRP1, regulator cycle plants, negatively regulate Genetic diversity analysis 141 accessions revealed it as breeding target selective sweep region. Our findings provide insights into mechanism underlying morphology weight, uncover promising gene improving yield.