NDLI: One gene in diamondback moth confers resistance to four Bacillus thuringiensis toxins

Content Provider	PubMed Central
Author	Tabashnik, Bruce E. Liu, Yong-biao Finson, Naomi Masson, Luke Heckel, David G.
Copyright Year	1997
Abstract	Environmentally benign insecticides derived from the soil bacterium Bacillus thuringiensis (Bt) are the most widely used biopesticides, but their success will be short-lived if pests quickly adapt to them. The risk of evolution of resistance by pests has increased, because transgenic crops producing insecticidal proteins from Bt are being grown commercially. Efforts to delay resistance with two or more Bt toxins assume that independent mutations are required to counter each toxin. Moreover, it generally is assumed that resistance alleles are rare in susceptible populations. We tested these assumptions by conducting single-pair crosses with diamondback moth (Plutella xylostella), the first insect known to have evolved resistance to Bt in open field populations. An autosomal recessive gene conferred extremely high resistance to four Bt toxins (Cry1Aa, Cry1Ab, Cry1Ac, and Cry1F). The finding that 21% of the individuals from a susceptible strain were heterozygous for the multiple-toxin resistance gene implies that the resistance allele frequency was 10 times higher than the most widely cited estimate of the upper limit for the initial frequency of resistance alleles in susceptible populations. These findings suggest that pests may evolve resistance to some groups of toxins much faster than previously expected.
Starting Page	1640
File Format	PDF
ISSN	10916490
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	5
Volume Number	94
Language	English
Publisher	The National Academy of Sciences of the USA
Publisher Date	1997-03-04
Access Restriction	Open
Rights Holder	The National Academy of Sciences of the USA
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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One gene in diamondback moth confers resistance to four Bacillus thuringiensis toxins.

Studies on diamondback moth resistance to bacillus thuringiensis CRY toxins

Genetic mapping of resistance to Bacillus thuringiensis toxins in diamondback moth using biphasic linkage analysis

Global variation in the genetic and biochemical basis of diamondback moth resistance to Bacillus thuringiensis

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Independent and Synergistic Effects of Knocking out Two ABC Transporter Genes on Resistance to Bacillus thuringiensis Toxins Cry1Ac and Cry1Fa in Diamondback Moth

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High Genetic Variability for Resistance to Bacillus thuringiensis Toxins in a Single Population of Diamondback Moth

One gene in diamondback moth confers resistance to four Bacillus thuringiensis toxins

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One gene in diamondback moth confers resistance to four Bacillus thuringiensis toxins.

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