Aspects of brown planthopper adaptation to resistant rice varieties with the Bph3 gene
Aspects of brown planthopper adaptation to resistant rice varieties with the Bph3 gene
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DOI：
10.1111/j.1570-7458.2011.01193.x
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发表时间：
2011-12-01
影响因子：
1.9
通讯作者：
Horgan, Finbarr G.
中科院分区：
文献类型：
--
作者：
Penalver Cruz, Ainara;Arida, Arriza;Horgan, Finbarr G.
尽管已经部署了30多年，但具有Bph 3基因的抗褐飞虱（BPH）品种，Nilaparvata lugens（Stal）（半翅目：Delphacidae），在菲律宾大部分地区仍然有效。在本研究中，我们确定了适应一个抗性品种的影响，IR 62假定拥有Bph 3基因对（1）对一系列具有相似生物型反应的品种的抗性（假定包含相同的主要抗性基因），和（2）与Bph 3发生在相同染色体位置的bph 4基因的差异品种。我们还研究了高土壤氮对Bph 3有效性的影响。饲养，稻飞虱生物量，发育时间减少在一个野生褐飞虱人口饲养IR 62相比，敏感的标准品种TN 1。但施氮增加了IR 62的感病性。在IR 62上经13代后，褐飞虱已适应了植株的抗性。适应的BPH对品种Rathu Heenati的毒力支持Bph 3存在于IR 62中的想法。在类似的IR品种（IR 60，IR 66，IR 68，IR 70，IR 72和IR 74），喂养，稻飞虱生物量，和发展速度一般较高的IR 62适应比非适应的BPH;然而，与预期相反，这些品种中的许多已经对野生BPH敏感。适应IR 62的BPH在Babawee品种上的适合度也较高，表明Bph 3和bph 4之间的密切关系。结果表明，传统的理解背后的遗传抗性IR品种需要重新处理，以开发和改进部署策略的阻力管理。
Despite over 30 years of deployment, varieties with the Bph3 gene for resistance to the brown planthopper (BPH), Nilaparvata lugens (Stal) (Hemiptera: Delphacidae), are still effective in much of the Philippines. In the present study, we determined the effects of adaptation to one resistant variety, IR62 assumed to possess the Bph3 gene on (1) resistance against a series of varieties with similar biotypical responses (presumed to contain the same major resistance genes), and (2) a differential variety with the bph4 gene that occurs at the same chromosome position as Bph3. We also examined the effects of high soil nitrogen on the effectiveness of Bph3. Feeding, planthopper biomass, and development times were reduced in a wild BPH population when reared on IR62 compared with the susceptible standard variety TN1. However, nitrogen application increased the susceptibility of IR62. After 13 generations on IR62, BPH had adapted to the plants resistance. Virulence of the adapted BPH against the variety Rathu Heenati supports the idea that Bph3 is present in IR62. Across similar IR varieties (IR60, IR66, IR68, IR70, IR72, and IR74), feeding, planthopper biomass, and development rates were generally higher for IR62-adapted than for non-adapted BPH; however, contrary to expectations, many of these varieties were already susceptible to wild BPH. Fitness was also higher for IR62-adapted BPH on the variety Babawee indicating a close relation between Bph3 and bph4. The results indicate that the conventional understanding of the genetics behind resistance in IR varieties needs to be readdressed to develop and improve deployment strategies for resistance management.