Resistance evaluation of soybean varieties to phytophthora root rot in South China
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    Abstract:

    【Objective】To systematically evaluate the resistance levels of soybean varieties to 7 strains of Phytophthora sojae in South China. 【Method】 Sixty seven soybean extension cultivars and main parents were identified for the resistance to 7 strains of Phytophthora sojae using the hypocotyls inoculation technique. 【Result and conclusion】 The infection rates of PGD1, Pm14, Pm28, PNJ1, PNJ3, PNJ4 and P6497 were 86.6%, 80.6%, 85.1%, 61.2%, 77.6%, 74.6% and 80.6% respectively, while 9.0% of the cultivars or lines were resistant to PGD1 strain which was newly found and isolated in Guangdong Province. Soybean varieties resistant to the Phytophthora strain PGD1 included Huaxia6, Yuexia2011-4, Guichun6, Guichun10, Guixia1 and Zhechun3. Among all tested species, twenty nine cultivars were susceptible to the 7 strains (accounting for about 43.3%). There are few Phytophthora-resistant soybean varieties in South China. It is necessary to breed and extend resistant cultivars(lines).

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CHENG Yanbo, MA Qibin, MU Yinghui, TAN Zhiyuan, WU Hong, NIAN Hai. Resistance evaluation of soybean varieties to phytophthora root rot in South China[J]. Journal of South China Agricultural University,2015,36(4):69-75

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History
  • Received:December 21,2014
  • Revised:
  • Adopted:
  • Online: July 10,2015
  • Published: