New Zealand Institute for Crop and Food Research Limited, Private Bag 4704, Christchurch, New Zealand.
Theor Appl Genet. 1995 Dec;91(8):1288-92. doi: 10.1007/BF00220943.
Hordeum bulbosum L. is a source of disease resistance genes that would be worthwhile transferring to barley (H. vulgare L.). To achieve this objective, selfed seed from a tetraploid H. vulgare x H. bulbosum hybrid was irradiated. Subsequently, a powdery mildew-resistant selection of barley phenotype (81882/83) was identified among field-grown progeny. Using molecular analyses, we have established that the H. bulbosum DNA containing the powdery mildew resistance gene had been introgressed into 81882/83 and is located on chromosome 2 (2I). Resistant plants have been backcrossed to barley to remove the adverse effects of a linked factor conditioning triploid seed formation, but there remains an association between powdery mildew resistance and non-pathogenic necrotic leaf blotching. The dominant resistance gene is allelic to a gene transferred from H. bulbosum by co-workers in Germany, but non-allelic to all other known powdery mildew resistance genes in barley. We propose Mlhb as a gene symbol for this resistance.
大麦属（Hordeum vulgare L.）是一种抗病基因的来源，值得将其转移到大麦属（Hordeum vulgare L.）中。为了实现这一目标，对四倍体大麦属（Hordeum vulgare L.）×大麦属（Hordeum bulbosum L.）杂种的自交种子进行了辐射处理。随后，在田间生长的后代中鉴定出了大麦属（Hordeum vulgare L.）表型的抗白粉病选择（81882/83）。通过分子分析，我们已经确定，含有白粉病抗性基因的大麦属（Hordeum bulbosum L.）DNA已被导入 81882/83，并位于染色体 2（2I）上。抗性植株已回交至大麦属（Hordeum vulgare L.），以去除导致三倍体种子形成的连锁因子的不利影响，但白粉病抗性与非致病性坏死叶斑之间仍存在关联。显性抗性基因与德国同事从大麦属（Hordeum bulbosum L.）转移的基因等位，但与大麦属（Hordeum vulgare L.）中所有其他已知的白粉病抗性基因均非同位。我们建议将 Mlhb 作为该抗性的基因符号。
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