Li Z F, Xia X C, Zhou X C, Niu Y C, He Z H, Zhang Y, Li G Q, Wan A M, Wang D S, Chen X M, Lu Q L, Singh R P
Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, 100081, Beijing, China.
Gansu Winter Wheat Research Institute, Duan Jia Tan 418, 730020, Lanzhou, China.
Plant Dis. 2006 Oct;90(10):1302-1312. doi: 10.1094/PD-90-1302.
Identification of seedling and slow stripe rust resistance genes is important for gene pyramiding, gene deployment, and developing slow-rusting wheat cultivars to control the disease. A total of 98 Chinese lines were inoculated with 26 pathotypes of Puccinia striiformis f. sp. tritici for postulation of stripe rust resistance genes effective at the seedling stage. A total of 135 wheat lines were planted at two locations to characterize their slow rusting responses to stripe rust in the 2003-2004 and 2004-2005 cropping seasons. Genes Yr2, Yr3a, Yr4a, Yr6, Yr7, Yr9, Yr26, Yr27, and YrSD, either singly or in combinations, were postulated in 72 lines, whereas known resistance genes were not identified in the other 26 accessions. The resistance genes Yr9 and Yr26 were found in 42 and 19 accessions, respectively. Yr3a and Yr4a were detected in two lines, and four lines may contain Yr6. Three lines were postulated to possess YrSD, one carried Yr27, and one may possess Yr7. Thirty-three lines showed slow stripe rusting resistance at two locations in both seasons.
鉴定幼苗期和慢锈性条锈病抗性基因对于基因聚合、基因布局以及培育慢锈性小麦品种以控制该病至关重要。总共98个中国品系接种了26个条锈菌生理小种，用于推测在幼苗期有效的条锈病抗性基因。2003 - 2004年和2004 - 2005年种植季，总共135个小麦品系种植在两个地点，以表征它们对条锈病的慢锈性反应。在72个品系中推测出单独或组合存在的Yr2、Yr3a、Yr4a、Yr6、Yr7、Yr9、Yr26、Yr27和YrSD基因，而在其他26份材料中未鉴定出已知抗性基因。抗性基因Yr9和Yr26分别在42份和19份材料中被发现。在两个品系中检测到Yr3a和Yr4a，四个品系可能含有Yr6。推测三个品系含有YrSD，一个品系携带Yr27，一个品系可能含有Yr7。33个品系在两个季节的两个地点均表现出慢条锈病抗性。
