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为了明确三江平原地区主栽大豆品种对大豆疫霉根腐病的抗性,对合丰56、合丰55、合丰50等13个主栽品种进行了大豆疫霉菌1号小种的盆栽接种和大田接种抗性分析试验。结果表明:合丰55在盆栽接种鉴定中表现为抗病,死亡率为27.41%,与其它品种相比,除了垦丰16和绥农28外,差异极显著。其在大田接种鉴定中表现为抗病,死亡率为3.33%,与其它品种相比,除垦丰16外,差异显著;大田接种减产率为3.84%,与未接种对照相比,差异显著。垦丰16在盆栽接种鉴定中表现为抗病,死亡率为24.81%,与其它品种相比,除了合丰55和绥农28外,差异极显著;在大田接种鉴定中表现为抗病,死亡率为6.67%,与其它品种相比,除合丰55外,差异显著;大田接种减产率为5.19%,与未接种对照相比,差异显著。研究结果表明,合丰55和垦丰16具有良好的抗性,大田接种试验表现减产率低,是适合三江平原地区种植的抗大豆疫霉根腐病的优良品种。
In order to clarify the resistance of the main cultivated soybean varieties to Phytophthora sojae in Sanjiang Plain, 13 main cultivars of Hefeng 56, Hefeng 55 and Hefeng 50 were inoculated with the inoculum of Phytophthora sojae 1 And field vaccination resistance test. The results showed that Hefeng 55 showed resistance to disease in pot inoculation identification, with a mortality rate of 27.41%. Compared with other varieties, Hefeng 55 had significant difference except for Kenfeng 16 and Suinong 28. Compared with other cultivars, the difference was significant except for Kenfeng 16; the yield reduction rate of field inoculation was 3.84%, which was significantly different from the non-inoculated control. Kenfeng 16 showed resistance to disease in pot inoculation identification, with a mortality rate of 24.81%. Compared with other varieties, except for Hefeng 55 and Suinong 28, Kenfeng 16 showed extremely significant difference. In field identification, resistance to disease and death The rate was 6.67%. Compared with other varieties, except for Hefeng 55, the difference was significant. The yield reduction rate of field inoculation was 5.19%, which was significantly different from the non-inoculated control. The results showed that Hefeng 55 and Kenfeng 16 had good resistance, and the yield reduction rate in field inoculation test was low, which was an excellent variety resistant to P. sojae root rot planted in the Sanjiang Plain.