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首页> 外文期刊>Plant Disease >Reduced incidence of bacterial rot on transgenic insect-resistant maize in the Philippines.
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Reduced incidence of bacterial rot on transgenic insect-resistant maize in the Philippines.

机译：降低了菲律宾转基因抗虫玉米上细菌腐烂的发生率。

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In the Philippines and parts of Southeast Asia, Asian corn borer (Ostrinia furnacalis) is a serious pest of maize, and injury from this insect often is associated with the occurrence of bacterial stalk and ear rot (caused by Erwinia chrysanthemi pv. zeae). The effect of transgenic insect protection on the incidence of bacterial stalk and ear rot was studied in the Philippines with seven field trials in Mindanao and two trials in Laguna. Three transgenic hybrids (expressing Bt protein Cry1Ab) and their conventional near-isogenic counterparts were included in Mindanao, and one transgenic/conventional hybrid pair was used in Laguna (Los Banos). In the Mindanao trials, bacterial stalk rot was rated on a 1 to 9 scale approximately 2 weeks before harvest, while in Laguna, bacterial rot mortality and bacterial ear rot incidence were assessed 10 days before and at harvest, respectively. In all trials, the number of Asian corn borer tunnels was assessed by splitting stalks at harvest. Results of the trials showed significant differences between the transgenic hybrids and their conventional counterparts in terms of bacterial stalk and ear rot incidence, number of Asian corn borer tunnels, and yield. Transgenic hybrids invariably showed significantly lower bacterial stalk rot mortality and ear rot incidence, no Asian corn borer infestation, and higher yield compared with their conventional counterparts. Average yield advantage of transgenic hybrids ranged from 1.2 to 5.1 t/ha. Results confirm the important role of Asian corn borer in the initiation and spread of bacterial stalk and ear rot in maize; hence, the use of transgenic insect-resistant hybrids will have an added value in areas where this disease is prevalent..
机译：在菲律宾和东南亚的部分地区，亚洲玉米bore（Ostrinia furnacalis）是一种严重的玉米害虫，这种昆虫的伤害通常与细菌茎和耳腐的发生有关（由欧文氏菌chrysanthemi pv。zeae引起）。在菲律宾，棉兰老岛有7个田间试验，拉古纳有2个试验，研究了转基因昆虫保护对细菌茎和耳腐发生率的影响。棉兰老岛（Mindanao）包括3个转基因杂种（表达Bt蛋白Cry1Ab）和它们的常规近等基因对等体，在拉古纳（Los Banos）中使用了一对转基因/常规杂种对。在棉兰老岛试验中，大约在收获前2周以1到9的等级对细菌茎腐进行了评分，而在拉古纳，分别在收获前和收获前10天评估了细菌腐烂的死亡率和细菌性耳腐的发生率。在所有试验中，亚洲玉米bore隧道的数量均通过在收获时分裂茎杆来评估。试验结果表明，转基因杂种与常规杂种之间在细菌茎和耳腐发病率，亚洲玉米bore隧道数量和产量方面存在显着差异。与传统的同类产品相比，转基因杂种始终显示出显着降低的细菌秸秆腐烂死亡率和耳腐发病率，没有亚洲玉米bore侵扰，并且产量更高。转基因杂种的平均产量优势介于1.2至5.1吨/公顷之间。结果证实了亚洲玉米bore在玉米中细菌杆和耳腐的发生和传播中的重要作用。因此，在这种疾病流行的地区，使用转基因抗虫杂种将具有附加价值。

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