Bachman M S, Nickell C D
Graduate Research Fellow.
Professor of Plant Breeding, Department of Crop Sciences, University of Illinois, Urbana 61801.
Plant Dis. 2000 Jun;84(6):694-699. doi: 10.1094/PDIS.2000.84.6.694.
In an effort to identify new sources of resistance to brown stem rot, caused by Phialophora gregata, 829 soybean accessions originating from 14 provinces in central and southern China and ranging in maturity from group IV to group VIII were obtained from the USDA Soybean Germplasm Collection. All accessions were inoculated in sequential evaluations in the greenhouse with three isolates of P. gregata. Putatively resistant accessions were compared statistically with resistant and susceptible standards. Two hundred forty-one, or approximately 29% of the accessions evaluated, were resistant to all three isolates of P. gregata. The percentage of resistant accessions varied among provinces, with the highest percentages identified in the provinces of Anhui, Gansu, Jiangsu, and Sichuan. Resistance to brown stem rot was not associated with maturity of the accessions or presence of soybean mosaic virus. These resistant accessions could be utilized as sources of brown stem rot resistance through integration of northern and southern soybean germ plasm.
为了确定对由格氏瓶霉引起的褐纹病的新抗性来源，从美国农业部大豆种质库获得了829份大豆种质，这些种质来自中国中部和南部14个省份，成熟度从IV组到VIII组不等。所有种质在温室中依次用三种格氏瓶霉分离株进行接种。将推定抗性种质与抗性和感病标准进行统计学比较。在评估的种质中，有241份（约占29%）对所有三种格氏瓶霉分离株具有抗性。抗性种质的百分比在各省之间有所不同，安徽省、甘肃省、江苏省和四川省的抗性种质百分比最高。对褐纹病的抗性与种质的成熟度或大豆花叶病毒的存在无关。通过整合北方和南方大豆种质，这些抗性种质可作为褐纹病抗性来源加以利用。
