Nucleotide diversity survey at OsAMT1;1 and at seven loci around it. For each locus, nucleotide diversity was investigated by sequencing 94 accessions of O. sativa and 19 accessions of O. rufipogon. Positions (kb) of sequenced regions relative to OsAMT1;1. (A) Levels of nucleotide diversity (Pi) for O. sativa and O. rufipogon. (B) Ratio of nucleotide diversity at these regions between O. sativa and O. rufipogon.