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Difference in SSR Variations Between Japanese Barnyard Millet (Echinochloa esculenta) and its Wild Relative E. crus-galli

2006; Japanese Society of Breeding; Volume: 56; Issue: 4 Linguagem: Inglês

10.1270/jsbbs.56.335

1347-3735

Shigeki Nozawa, Mitsuko Takahashi, Hirokazu Nakai, Yoichiro Sato,

Allelopathy and phytotoxic interactions

Simple sequence repeat (SSR) variations were investigated in the Japanese barnyard millet, Echinochloa esculenta, its wild relative, E. crus-galli var. crus-galli and the rice-mimicking weed E. crus-galli var. formosensis. E. esculenta showed less average gene diversity (H) based on observed SSR allele frequency (0.37) than either E. crus-galli var. crus-galli (0.56) or E. crus-galli var. formosensis (0.55). Accessions of the three Echinochloa taxa were categorized into 13 phenotypes from the combinations of SSR alleles. Only two phenotypes, phenotypes 1 and 4, were detected in 49 accessions of E. esculenta, whereas 12 phenotypes were observed in 94 accessions of E. crus-galli var. crus-galli, and six phenotypes in 12 accessions of E. crus-galli var. formosensis. The H′ value (Shannon's information index) for SSR phenotypes was 0.69 in E. esculenta, 1.47 in E. crus-galli var. formosensis and 1.90 in E. crus-galli var. crus-galli respectively. In cultivated barnyard millet, two phenotypes aggregated in particular areas of Japan; phenotype 4 was found in the central and northeastern part of Japan, while phenotype 1 in the northern and southern parts of Japan.