At present, inbred lines of transgenic insect resistant maize with selective marker gene removed are in separating and inbreeding program assisted by DNA marker detection.

目前，正结合进行田间分离纯合和DNA分子鉴定，培育去除选择标记基因的转基因抗虫玉米自交系。

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Breeding of insect resistant cotton with gene engineering is one of the popular field of cotton biotechnology that bring hope for the prevention and control of cotton pests.

抗虫转基因棉花的培育是近年来棉花生物技术研究的热点，它为棉杜虫害的防治展示了希望。

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The result showed that: 1. These transgenic insect-resistant cotton after introducing different exogenous gene have different resistance to boll-worm because of distinct killing mechanism;

研究结果表明：1 导入不同外源基因的转基因抗虫棉因其杀虫机理不同而对棉铃虫抗性存在差异；

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Yet, as the National Academy of Sciences has noted, this method is far more unpredictable than inserting a single gene from another species, as was done to produce insect-resistant corn, soybeans and cotton.

FORBES: Green Genes

For example, widespread failure in our handful of remaining major crops and animal breeds due to disease or pest outbreaks is a very real possibility: given that pest and pathogens are constantly evolving, a diverse gene pool is essential if we are to develop insect- and disease-resistant strains in the future.

FORBES: The Future of Life On Earth: Part Two Of The Discussion