Fig. 4

Sequence variation of OsC1 in 50 accessions. According to DNA sequence variation, 5 groups were classified. The accessions of Group I exhibit red purple, purple, tryan rose and green leaf sheath and have complete OsC1 sequences closely resembling that of Tainung 72. The accessions of Group II have red purple and tryan rose leaf sheath and share the sequence of Shang Chi Tsao Tao, which has one nonsynonymous mutation in position 1192. The accessions of Group III have blackish purple and green leaf sheath and share the sequence of Kun Shan Wu Siang Keng, which has one nonsynonymous mutation in position 918. The accessions of Group IV have green leaf sheath and share the sequence of Taichung Sen 17, which has a 10-bp deletion starting at position 796. The accessions of Group V include 6 wild A-genome species. Non-synonymous amino acid mutations were indicated to have similar function (yellow) or altered polarity (blue), charge (pink) and aromatic nature (green). d: deletion. i: insertion