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首页> 外文期刊>Genetic Resources and Crop Evolution >Novel sources of resistance to the soybean cyst nematode (Heterodera glycines) found in wild relatives of azuki bean (Vigna angularis) and their characteristics of resistance
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Novel sources of resistance to the soybean cyst nematode (Heterodera glycines) found in wild relatives of azuki bean (Vigna angularis) and their characteristics of resistance

机译：在azuki bean（Vigna angularis）的野生近缘种中发现的对大豆孢囊线虫（Heterodera甘氨酸）的新抗性来源及其抗性特征

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摘要

Soybean cyst nematode (Heterodera glycines; SCN) is becoming a serious problem in azuki bean (Vigna angularis var. angularis) production in Hokkaido, Japan. To find sources of resistance to SCN, we screened wild relatives of azuki bean and calculated “female indices” (FIs) of 342 accessions from 8 Vigna species that are cross-compatible with azuki bean. Twenty-three accessions belonging to V. hirtella, V. minima, V. nakashimae, V. riukiuensis, and V. tenuicaulis were resistant to the most prevalent SCN race, race 3, but most of them were only moderately resistant or susceptible to race 5. Four promising accessions (V. minima JP205886, JP205891, and JP210806, and V. nakashimae JP107879) showed a high level of resistance to all SCN races found in Japan (1, 3, and 5) and race 2 (an experimentally derived race from race 5). Since the SCN-resistant soybean cultivars released in Japan are not resistant to races 2 and 5, these wild Vigna accessions may have resistance mechanisms different from that of soybean. Continuous culture of race 3 on promising accessions showed that it might be difficult to overcome the resistance of these accessions. The resistance sources found in this study will be useful in controlling SCN through the breeding of SCN-resistant azuki bean cultivars. This study also showed the effectiveness of using wild genetic resources for identifying novel resistance sources.
机译：大豆囊肿线虫（Heterodera甘氨酸； SCN）在日本北海道的小豆生产中正成为一个严重的问题。为了找到抗SCN的来源，我们筛选了小豆的野生近缘种，并计算了与小豆交叉兼容的8个Vigna物种的342个种的“女性指数”（FIs）。 hirtella，V。minima，V。nakashimae，V。ruukiuensis和V. tenuicaulis的23个种质对最普遍的SCN种族，第3种族具有抗性，但其中大多数仅具有中等抗性或对种族易感5.四个有希望的登录号（极小种JP205886，JP205891和JP210806，以及中假种V.nakashimae JP107879）显示出对日本（1、3和5）和第2种（实验性衍生的）所有SCN种族的高水平抗性。比赛5）。由于在日本发行的抗SCN大豆品种对第2和第5种不具有抗性，因此这些野生Vigna品种的抗性机制可能与大豆不同。第3种种族在有希望的种质上的连续培养表明，可能难以克服这些种质的抗性。本研究中发现的抗性来源将通过抗SCN的小豆品种的选育来控制SCN。这项研究还表明了利用野生遗传资源鉴定新型抗药性来源的有效性。

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