Phakopsora pachyrhizi is an obligatory biotrophic fungus that causes Asian soybean rust (ASR) disease. ASR control primarily involves chemical control and the use of resistant soybean cultivars carrying an Rpp (resistance to P. pachyrhizi) gene. This study aimed to characterize the ASR resistance of three soybean Asian landraces. By screening the world core collection (WC) of soybean, which consists of 80 varieties, three landraces were identified in Southeast Asia as resistant to ASR. Genetic mapping using the F₂ population derived from a cross with an ASR-susceptible variety, BRS 184, indicated that KS 1034 (WC2) has ASR resistance conferred by a single dominant resistance gene, mapped on chromosome 18, in the same region where Rpp1 was mapped previously. The BRS 184 × WC61 (COL/THAI/1986/THAI-80) F₂ population, on the other hand, showed an ASR resistance locus mapped by quantitative trait locus analysis on chromosome 6, in the region where the resistance conferred by PI 416764 Rpp3 resides, with a logarithm of the odds score peak at the same position as the marker, Satt079, while the BRS 184 × WC51 (HM 39) population showed the resistance to ASR allocated between Satt079 and Sat_263 markers, also in the region where Rpp3 was mapped previously. Both WC51 and WC61 have the same infection profile as FT-2 and PI 462312 when tested against the same ASR isolate panel. These three WCs can be used in MAS programs for introgression of Rpp1 and Rpp3 and the development of ASR-resistant cultivars in the breeding program.

豆薯层锈菌（Phakopsora pachyrhizi）是一种必需的生物营养真菌，可引起亚洲大豆锈病（ASR）。ASR控制主要涉及化学控制和使用携带抗性大豆品种的RPP（抗性P。锈菌基因）。这项研究旨在表征三种亚洲大豆地方品种的抗ASR特性。通过筛选由80个品种组成的世界大豆核心品种（WC），在东南亚确定了三种抗ASR的地方品种。使用F _2进行基因定位来源于具有ASR易感品种BRS 184的杂交群体表明，KS 1034（WC2）具有一个单一的显性抗性基因所赋予的ASR抗性，该基因定位在18号染色体上，与之前绘制Rpp1的区域相同。另一方面，BIR 184×WC61（COL / THAI / 1986 / THAI-80）F ₂种群显示了通过PI 66464赋予抗性的区域通过定量性状基因座分析在6号染色体上绘制的ASR抗性基因座。Rpp3驻留，比值得分峰的对数与标记Satt079处于同一位置，而BRS 184×WC51（HM 39）种群显示出对Satt079和Sat_263标记之间分配的ASR的抵抗力，也位于Rpp3所在的区域之前已映射。当针对相同的ASR分离物组进行测试时，WC51和WC61与FT-2和PI 462312具有相同的感染特征。这三个WC可用于MAS程序中，以使Rpp1和Rpp3渗入基因，并在育种程序中开发抗ASR品种。