Fig. 1

Population structure analysis of tetraploid rice lines. PCA (a) and phylogenetic (b) analyses of tetraploid rice population based on whole genome SNP variations, (c) Population structure analysis conducted by ADMIXTURE with k = 5, (d) Fraction of indica (R498) and japonica (MSU7) genomes present in autotetraploid rice (ATRs) and neo-tetraploid rice (NTRs). Sample names start with “Huaduo” are NTRs. Accession 96,025 and the accessions with the extensions of “-4x” are ATRs, and samples from different ecotypes were distinguished by color. Samples with extensions of “-G”, “-I” represents japonica and indica diploid rice, respectively. Common wild rice samples start with “Huaye” or end with “-W”