Pathogenic races of <i>Phytophthora sojae</i> in <i>Glycine max</i> cv. Tanbakuro producing areas in Hyogo and selection of parental soybeans for breeding new resistant cultivars

DOI Web Site 2 Citations
  • Sugimoto Takuma
    Hyogo Agricultural Institute for Agriculture, Forestry and Fisheries
  • Yoshida Shinya
    Hyogo Agricultural Institute for Agriculture, Forestry and Fisheries
  • Aino Masataka
    Hyogo Agricultural Institute for Agriculture, Forestry and Fisheries
  • Maekawa Kazumasa
    Hyogo Agricultural Institute for Agriculture, Forestry and Fisheries
  • Kanto Takeshi
    Hyogo Agricultural Institute for Agriculture, Forestry and Fisheries
  • Matoh Toru
    Graduate school of Agriculture, Kyoto University
  • Koroda Yasuo
    Hyogo Prefectural Tanba Agricultural Improvement and Extension Center
  • Irie K.
    Hyogo Agricultural Institute for Agriculture, Forestry and Fisheries
  • Watanabe Kazuhiko
    Hyogo Agricultural Institute for Agriculture, Forestry and Fisheries Tokyo University of Agriculture Department of Applied Biology and Chemistry

Bibliographic Information

Other Title
  • 兵庫県の丹波黒栽培地域におけるダイズ茎疫病菌のレース分布と育種母本の選抜
  • Pathogenic races of Phytophthora sojae in Glycine max cv. Tanbakuro producing areas in Hyogo and selection of parental soybeans for breeding new resistant cultivars

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Abstract

This study investigated disease occurrence of Phytophthora stem rot of soybean (caused by Phytophthora sojae) in Glycine max (L.) Merr. cv. Tanbakuro producing areas in Hyogo from 2005-2007, pathogenic races of P. sojae, and effectiveness of five Rps genes and eight soybean cultivars to several races. Disease incidence at 93 different fields in seven regions of Hyogo ranged from 3.3 to 23.5% in 2005 to 2007. Ninety-three isolates of P. sojae were recovered from the 93 fields. Six Japanese differential soybean cultivars were used for race determination of the 93 isolates with the agar medium inoculation method. The results showed that race E was a major component of all the P. sojae population, followed by races A, L, K, M, G, N and new race O. This result was subsequently integrated with the previous data with 51 isolates derived from 2002-2004. Race E tended to be dominant from 2002-2007 throughout seven regions of Hyogo. Cvs. Enrei, Sachiyutaka, Rps6 in cv. Altona, Rps1a+Rps7 in cv. Harosoy 63, and Rps1k in cv. L77-1794, considered to be strongly resistant in the USA, were susceptible to most of 144 isolates, suggesting that they were ineffective. Rps1d in cv. PI103091 was not defeated by the 144 isolates, nor was cv. Gedenshirazu-1. Cv. Ohojyu was resistant to 140 of the 144 isolates. These results indicate that three soybean cultivars were still potential sources of resistance to breed new resistant cultivars with the desirable characteristics of cv. Tanbakuro.

Journal

  • Journal of Crop Research

    Journal of Crop Research 55 (0), 19-25, 2010

    The Society of Crop Science and Breeding in Kinki, Japan

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