Chromosomal location of genes for resistance to powdery mildew in Chinese wheat lines Jieyan 94-1-1 and Siyan 94-1-2
Chromosomal location of genes for resistance to powdery mildew in Chinese wheat lines Jieyan 94-1-1 and Siyan 94-1-2
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DOI：
10.1034/j.1601-5223.2002.1360306.x
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发表时间：
2002-01-01
期刊：
影响因子：
2.7
通讯作者：
Zeller, FJ
中科院分区：
文献类型：
--
作者：
Huang, XQ;Hsam, SLK;Zeller, FJ
两个小麦品系杰研94-1-1和泗研94-1-2对120个小麦白粉病菌菌株全部表现抗性。在德国的魏亨斯特潘保存了一个小种。对21个中国春感病单体系进行单体分析，结果表明：结研94-1-1在小麦/黑麦易位系1B/1 R染色体上携带一对显性基因，在7 B染色体上携带一对隐性基因，而泗研94-1-2在7 B染色体上携带一对隐性基因，在5D染色体上携带一对显性基因。等位性测定结合特异分离物的使用证实，杰研94-1-1和四研94-1-2的显性基因分别为Pm_8和Pm_2。两个品系中存在的隐性基因显示为位于染色体7 B上pm 5位点的新等位基因。这两个基因在杰研94-1-1中暂时命名为mljy，在四研94-1-2中暂时命名为mlsy。
Two Chinese wheat lines Jieyan 94-1-1 and Siyan 94-1-2 are resistant to all 120 isolates of Blumeria graminis f. sp. tritici maintained in Weihenstephan, Germany. Monosomic analyses employing the susceptible set of 21 Chinese Spring monosomic lines revealed that the line Jieyan 94-1-1 carries one dominant gene on translocated wheat/rye chromosome 1B/1R and one recessive gene on chromosome 7B, whereas line Siyan 94-1-2 possesses one recessive gene on chromosome 7B and one dominant gene on chromosome 5D. Allelism tests in combination with the use of specific isolates confirmed that the dominant genes in Jieyan 94-1-1 and Siyan 94-1-2 are Pm8 and Pm2, respectively. The recessive genes present in each of the two lines are shown to be new alleles located on chromosome 7B at the pm5 locus. The two genes are tentatively designated mljy in Jieyan 94-1-1 and mlsy in Siyan 94-1-2, respectively.