野生大豆资源对灰斑病抗性鉴定与评价

开展野生大豆资源对灰斑病抗性鉴定，旨在为拓宽大豆灰斑病抗病的新基因资源和鉴定新的抗病种质，用于抗灰斑病育种工作。在大豆生育阶段R3-R4时期对104份野生大豆材料进行人工接种灰斑病菌。结果表明：抗病材料有29份，占供试材料的27.9%；中抗材料有45份，占供试材料的43.3%；感病材料有30份，占供试材料的28.8%。用灰斑病菌多菌株接种于104份野生大豆材料进行抗病性指数测定，结果表明：有86份材料抗性指数较高，对不同来源的菌株均表现了一定的抗病性，这些材料可用于水平抗性育种工作。野生大豆资源中有丰富的抗灰斑病基因资源，即有单一抗性资源还有广谱抗性资源。

Evaluation and Identification of Resistance of Wild Soybean Germplasm to Cercospora sojina

The identification of resistance of wild soybean germplasm to Cercospora sojina was developed in order to explore the new gene resources and identify new resistance germplasm to be used for resistance breeding. 104 portions of wild soybean materials were infected with C. sojina by artificial inoculation at the stage of R3-R4 of soybean growth phages. The results showed that 29 portions were resistant, 45 portions were interim resistant and 30 portions were sensitive, which accounted for 27.9%, 43.3% and 28.8% respectively of all the tested materials. The test of resistance index by way of inoculated several C. sojina strains into 104 portions of wild soybean materials showed that 86 portions had higher resistance index and expressed certain resistance to those different strains. These materials could be used for horizontal resistance breeding. There were rich resistance resources among the wild soybean germplasms, including single resistance resources and broad spectrum resistance resources.