Bayerische Landesanstalt für Landwirtschaft (LfL), Institut für Pflanzenbau und Pflanzenzüchtung (IPZ), Am Gereuth 8, 85354, Freising, Germany.
Plant Breeding, Centre for Food and Life Sciences Weihenstephan, Technical University of Munich, Liesel-Beckmann-Str. 2, 85354, Freising, Germany.
J Appl Genet. 2020 May;61(2):163-168. doi: 10.1007/s13353-020-00541-z. Epub 2020 Jan 24.
Seedling resistance to leaf rust available in the synthetic hexaploid wheat line Syn137 was characterised by means of cytogenetic and linkage mapping. Monosomic analysis located a single dominant gene for leaf rust resistance on chromosome 5D. Molecular mapping not only confirmed this location but also positioned the gene to the distal part of the long arm of chromosome 5D. A test of allelism showed that the gene, tentatively named LrSyn137, is independent but closely linked to Lr1. It appears that Syn137 is occasionally heterogeneous for Lr1 since the analysis of the Lr1-specific marker RGA567-5 in the genetic mapping population indicated the presence of Lr1. Syn137 represents another source of genetic variation that can be useful for the diversification of leaf rust resistance in wheat cultivars.
利用细胞学和连锁作图的方法对合成六倍体小麦品系 Syn137 中存在的幼苗抗叶锈性进行了鉴定。单体分析将一个控制叶锈病的显性单基因定位于 5D 染色体上。分子作图不仅证实了该位置，还将该基因定位在 5D 染色体长臂的远端。等位基因测试表明，该基因暂命名为 LrSyn137，是独立的，但与 Lr1 紧密连锁。由于在遗传作图群体中分析 Lr1 特异性标记 RGA567-5 表明存在 Lr1，因此 Syn137 对 Lr1 来说似乎偶尔是异质的。Syn137 代表了另一种遗传变异来源，可用于小麦品种叶锈病抗性的多样化。
