Evaluation of resistance of some hybrid rices, conventional early indica and late japonica rice to Magnaporthe grisea in China

Shen Ying; Adreit, H.; Zhu XuDong; Milazzo, J.; Chen HongQi; Tharreau, D.

Scientia Agricultura Sinica 37(3): 362-369

2004


ISSN/ISBN: 0578-1752
Accession: 004152424

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Abstract
Thirty isolates of M. grisea collected from 18 provinces/cities of China representing 12 pathotypes and 9 different lineages were chosen for pathogenicity test with artificial inoculation on some rice varieties with known resistance genes, of hybrid rice, and conventional early indica and late japonica varieties cultivated in China since the 1990s. Virulence spectrum of the 30 isolates tested was very different, showing that they recognize numerous different resistance genes. Varieties also revealed very different resistance patterns showing that they carry different resistance genes or combinations of resistance genes. On the basis of comparisons with international differential varieties with known resistance genes, the presence of these resistance genes in certain Chinese varieties could be speculated. The results indicated that some varieties were resistant to most of the isolates tested and that they could be of interest as resistance sources for hybrid parents or to be planted in the field directly.