抗大豆疫霉根腐病野生大豆资源的初步筛选

Preliminary Screening for Phytophthora Root Rot Resistance in Wild Soybean

由大豆疫霉菌引起的大豆疫霉根腐病是严重影响大豆生产的毁灭性病害之一。防治该病唯一经济、有效和环境安全的方法是利用抗病品种。本研究对野生大豆资源进行抗大豆疫霉根腐病初步筛选,以期探讨野生大豆的抗性水平、分布和获得抗性野生大豆资源。通过苗期接种大豆疫霉菌对4 12份野生大豆资源进行抗病性鉴定,有13 4 %的资源抗大豆疫霉根腐病,15 3%的资源表现为中间反应类型。对野生大豆资源的来源分析表明,抗大豆疫霉根腐病野生大豆资源在我国分布广泛,其中安徽省野生大豆资源抗性最丰富。

Phytophthora root rot caused by Phytophthora sojae is a destructive disease for soybeans throughout the soybean production regions of world. Utilization of resistant varieties is the most economical and environmentally safe method for controlling the disease. The study screened for resistance of wild soybeans to Phytophthora root rot and investigated their geographical distribution. Four hundred and twelve wild soybean accessions were identified for their reaction to P. sojae strain USAR1 with virulence 1a, 1d,2,3b,5,7 using an agar pluginoculation in seedling. 13.4 % accessions were resistant and 15.3 % accessions were intermediate response. The results indicated that the distribution of Phytophthora resistant wild soybeans was extensive in China, in which it was the most abundant in Anhui province.