New sources of resistance to Phytophthora sojae in the soybean plant introductions
New sources of resistance to Phytophthora sojae in the soybean plant introductions
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DOI：
10.1094/pdis.2000.84.12.1303
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发表时间：
2000-12-01
期刊：
影响因子：
4.5
通讯作者：
Schmitthenner, AF
中科院分区：
文献类型：
--
作者：
Dorrance, AE;Schmitthenner, AF
单一显性Rps基因对大豆疫霉的控制效果显著。然而，大豆疫霉的许多生理小种已经响应于部署单基因抗性而发展。需要具有潜在新型Rps基因的新抗性来源。使用Rps基因的下胚轴接种技术和部分抗性的层测试，评估来自美国农业部大豆种质资源收集的一系列种质（PI 273483至PI 427107）对Fl大豆的抗性。在1，015份供试材料中，159份材料感病小种7（vir 1a，2，3a，3c，4，5，6，7），17（1b，1d，2，3a，3b，3c，4，5，6，7）和25（1a，1b，1c，1k，7）。然而，162个加入这三个种族和32个加入抵抗额外的五个种族，特别是选择引发一个敏感的相互作用与两个和三个Rps基因组合。此外，在887份供试材料中，55.5%的材料对大豆疫霉具有高水平的部分抗性或耐性（得分小于或等于4.0）。大多数对所有测试的小种都有抗性的品种和具有非常高水平的部分抗性的品种来自大韩民国。这些结果表明，该地区是一个多源抗源区，既有特异的Rps基因，又有部分抗性。
Single dominant Rps genes have been highly effective in managing Phytophthora sojae. However, numerous physiological races of P. sojae have developed in response to deploying single gene resistance. New sources of resistance with potentially novel Rps genes are needed. A selection of accessions (PI273483 to PI427107) from the United States Department of Agriculture Soybean Germplasm collection were evaluated for resistance to Fl sojae using the hypocotyl inoculation technique for Rps genes and the layer test for partial resistance. Of the 1,015 accessions tested, 159 accessions were susceptible to races 7 (vir 1a, 2, 3a, 3c, 4, 5, 6, 7), 17 (1b, 1d, 2, 3a, 3b, 3c, 4, 5, 6, 7), and 25 (1a, 1b, 1c, 1k, 7). However, 162 accessions were resistant to these three races and 32 accessions were resistant to an additional five races chosen specifically to elicit a susceptible interaction with two and three Rps gene combinations. In addition, 55.5% of the 887 accessions tested had high levels of partial resistance or tolerance (scores less than or equal to4.0) to P. sojae. The majority of the accessions that were resistant to all of the races tested and those that had very high levels of partial resistance originated in the Republic of Korea. These results indicate that this region is an area with many sources of resistance to P. sojae for both specific Rps genes and partial resistance.