RECS International Inc., 24-28 Sanbancho Chiyoda-ku, Tokyo 102-0075, Japan.
J Econ Entomol. 2012 Apr;105(2):598-607. doi: 10.1603/ec11253.
No soybean cultivars exhibit resistance to larval damage by the cerambycid, Dectes texanus LeConte, in the United States. Selected soybean varieties and plant introductions (PIs) in maturity groups VI to VIII from the U.S. Department of Agriculture National Soybean Germplasm Collection were evaluated for D. texanus resistance in a series of field and laboratory experiments from 2005 through 2008. In field cage experiments, the numbers of oviposition punctures (OPs) per plant were determined as indicators of oviposition antixenosis and the ratio of OPs per live D. texanus larvae (OP/Lv) served as an indicator of plant antibiosis to larvae. A D. texanus-susceptible variety treated with the systemic insecticide fipronil was used as a positive antibiosis control. Plant introduction PI165673 had the highest OP/Lv ratio, indicating that even if oviposition was successful, an antibiosis factor in PI165673 significantly reduced egg hatch and the resulting number of live D. texanus larvae. Factorial analyses indicated that maturity group is not a significant factor in the expression of resistance. Thus, PI165673 appears to be a potential source of resistance to D. texanus. In related field studies, the preferred D. texanus oviposition site was localized to leaf petioles in the upper four or five nodes of the plant canopy. Histomorphological analyses of petiole cross-sections of plant introductions PI171451, PI165676, and PI165673 indicated that leaf petiole morphology may be related to reduced D. texanus oviposition on petioles of PI171451 and PI165676, but that resistance in PI165673 is independent of petiole morphology.
在美国，没有大豆品种对 Cerambycid 幼虫的幼虫损害表现出抗性，Dectes texanus LeConte。从美国农业部国家大豆种质收集的成熟组 VI 至 VIII 的选定大豆品种和植物引种（PI）在 2005 年至 2008 年的一系列田间和实验室实验中评估了 D. texanus 抗性。在田间笼实验中，每个植物的产卵穿刺（OP）数被确定为产卵抗生性的指标，并且活 D. texanus 幼虫的 OP/Lv 比（OP/Lv）作为植物对幼虫的抗生作用的指标。用系统杀虫剂 fipronil 处理的 D. texanus 易感品种用作阳性抗生性对照。植物引种 PI165673 具有最高的 OP/Lv 比，这表明即使产卵成功，PI165673 中的抗生性因素也会显著降低卵孵化和由此产生的活 D. texanus 幼虫的数量。因子分析表明，成熟组不是抗性表达的重要因素。因此，PI165673 似乎是对 D. texanus 的潜在抗性来源。在相关的田间研究中，D. texanus 首选的产卵部位定位在植物冠层的上四个或五个节点的叶柄上。植物引种 PI171451、PI165676 和 PI165673 的叶柄横截面组织形态学分析表明，叶柄形态可能与减少 D. texanus 在 PI171451 和 PI165676 叶柄上的产卵有关，但 PI165673 的抗性独立于叶柄形态。
