Figure 3.
Variations in GLA were significantly associated with grain length and awn development. (a) Gene‐based association analysis of GLA for grain length (upper) and awns (lower) using a naïve model (t‐test; P = 2.17 × 10−2). Red arrows represent significant loci. (b,f) Haplotype analysis of GLA for grain length (b) and awns (f). No., number. Average grain lengths of rice varieties harbouring corresponding haplotypes are indicated following the slash. (c) Comparison of grain lengths in different haplotypes. (d) Transient expression assays of promoter activity in tobacco leaves. ProGLA represents the presence of InDel1 in the promoter. Progla represents the deletion of InDel1 in the promoter. Each experiment consisted of three biological repeats with four technical replications. (e) Correlation analysis between GLA mRNA levels and grain length in 26 rice varieties assessed at Sanya (Hainan province).