Oloka H K, Tukamuhabwa P, Sengooba T, Shanmugasundram S
Department of Crop Science, Makerere University, P.O. Box 7062 Kampala, Uganda.
Program for Biosafety Systems, IFPRI-Uganda, P. O. Box 28565, Kampala, Uganda.
Plant Dis. 2008 Nov;92(11):1493-1496. doi: 10.1094/PDIS-92-11-1493.
Host plant resistance is the best long-term strategy for managing soybean rust (Phakopsora pachyrhizi) in endemic areas. Resistance breeding efforts are hampered by the presence of several races of the pathogen that often overcome single resistance genes deployed against them. In Uganda, only two soybean cultivars show moderate resistance to Phakopsora pachyrhizi, but this is likely to break down given the aggressive nature of the pathogen. A total of 25 rust tolerant or resistant accessions were imported from the Asian Vegetable Research and Development Centre and screened at Namulonge, in central Uganda. Only 10 accessions, G 33, G 8527, G8586, G 8587, GC 60020-8-7-7-18, GC 87016-11-B-2, GC 87021-26-B-1, SRE-D-14A, SRE-D-14B, and SS 86045-23-2, showed no rust symptoms at growth stage R6 during the three seasons of testing. Soybean rust resistance genes Rpp1, Rpp3, and Rpp4 did not confer resistance at Namulonge; gene Rpp2 was effective.
在疫病流行地区，寄主植物抗性是防治大豆锈病（豆薯层锈菌）的最佳长期策略。由于该病原菌存在多个生理小种，常能克服针对它们所部署的单个抗性基因，抗性育种工作受到阻碍。在乌干达，只有两个大豆品种对豆薯层锈菌表现出中等抗性，但鉴于病原菌的侵袭性，这种抗性可能会丧失。从亚洲蔬菜研究与发展中心总共引进了25份耐锈或抗锈种质，并在乌干达中部的纳穆隆格进行了筛选。在三个测试季节中，只有10份种质，即G 33、G 8527、G8586、G 8587、GC 60020-8-7-7-18、GC 87016-11-B-2、GC 87021-26-B-1、SRE-D-14A、SRE-D-14B和SS 86045-23-2，在R6生长阶段未表现出锈病症状。大豆锈病抗性基因Rpp1、Rpp3和Rpp4在纳穆隆格不具有抗性；基因Rpp2有效。
