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首页> 外文期刊>Acta Horticulturae >Powdery mildew resistant hop germplasm release: 'Kazak 2000'.
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Powdery mildew resistant hop germplasm release: 'Kazak 2000'.

机译：抗白粉病的啤酒花种质释放：'Kazak 2000'。

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A USDA-sponsored plant collecting expedition in collaboration with the Vavilov Institute of Plant Industry (VIR), St. Petersburg, Russian Federation, and the Aral Sea Experiment Station for Plant Genetic Resources, Chelkar Town, Kazakhstan, was conducted in the fall of 2000. Hop (Humulus lupulus var. lupulus) cones were collected from wild plants growing on trees in a moist area about 50 km NE of Emba, Kazakhstan. A portion of the seeds were brought to the US and donated to the US Department of Agriculture, Agricultural Research Service, National Clonal Germplasm Repository in Corvallis, Oregon. Of 74 seedlings that were germinated from Kazakhstani seedlots, four seedlings from PI 635262 demonstrated resistance to powdery mildew, caused by Podosphaera macularis (Braun and Takamatsu). One of these resistant seedlings, 'Kazak 2000', exhibited a hypersensitive response after challenge by powdery mildew, especially when incubated at temperatures greater than 29 degrees C post-infection. In greenhouse assays with an Oregon field population of P. macularis, macroscopic signs of powdery mildew were not observed following repeated inoculations. In laboratory assays at 18 degrees C, 'Kazak 2000' did not develop powdery mildew when challenged with a P. macularis isolate capable of overcoming resistance genes Rb, R3, and R5. Infection of 55% of detached leaves was observed when challenged with characterized isolates capable of overcoming Rb, R3, R4, R5, R6 or Rb, R1, R2, R3, R5, and R6, respectively. In experimental field plots in Oregon from 2003 to 2007, only one powdery mildew colony was observed despite inoculation and exposure to natural inoculum sources each year. Infection of cones was not observed. 'Kazak 2000' provides a novel source of powdery mildew resistance that is effective at high temperatures against multiple races of the pathogen. Limited quantities of cuttings of 'Kazak 2000' are available for research or breeding. Requests should be made to the Hop Curator, USDA-ARS, National Clonal Germplasm Repository, Corvallis, OR 97333.
机译：2000年秋天，美国农业部与俄罗斯联邦圣彼得堡瓦维洛夫植物工业研究所（VIR）以及哈萨克斯坦切尔卡尔镇植物遗传资源咸海实验站合作，开展了由美国农业部资助的植物收集研究。从哈萨克斯坦恩巴约50 km东北潮湿地区的树木上生长的野生植物中收集了蛇麻草（ var。 lupulus ）球果。部分种子被带到美国，并捐赠给了俄勒冈州科瓦利斯的国家克隆种质资源库的美国农业部农业研究局。在哈萨克斯坦种田发芽的74株幼苗中，来自PI 635262的4株幼苗表现出抗白粉病的能力，这是由 Podosphaera macularis （布劳恩和高松）引起的。这些抗性幼苗之一“ Kazak 2000”在受到白粉病侵袭后表现出超敏反应，尤其是在感染后于高于29摄氏度的温度下孵育时。在温室试验中，俄勒冈州田间种群的磷为P。黄斑病，反复接种后未观察到白粉病的宏观迹象。在18摄氏度的实验室分析中，'Kazak 2000'受到 P的攻击时，不会产生白粉病。能够克服抗性基因R b ，R 3 和R 5 的黄斑分离株。用能够克服R b ，R 3 ，R 4 ，R 5 ，R 6 或R b ，R 1 ，R 2 ，R 3 ，R 5 和R 6 。 2003年至2007年，在俄勒冈州的实验田中，尽管每年进行接种和暴露于自然接种源，但仅观察到一个白粉病菌落。未观察到视锥感染。 “ Kazak 2000”提供了一种新的抗白粉病来源，在高温下可有效抵抗多种病原体。 “ Kazak 2000”的cutting插数量有限，可用于研究或育种。应该向蛇麻草馆长，USDA-ARS，国家克隆种质资源库（科瓦利斯或OR 97333）提出要求。

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