06.07.2013 Views

Contents - Faperta

Contents - Faperta

Contents - Faperta

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Genetic Engineering of Natural Enemies for Integrated Pest Management 299<br />

measurements. The A. californica NPV has also been used as a vector for expression of foreign<br />

genes in B. mori (Mori et al., 1995). Homologous recombination of the host gene and<br />

the virus allows specifi c alteration of gene sequences (Yamao et al., 2002). The baculovirus<br />

expression system has been used to modify silk proteins or production of hormones in<br />

silkworm (Kadonookuda et al., 1995; Yang et al., 2002).<br />

Genetic Improvement of Beneficial Arthropods<br />

Genetic transformation can be used to improve the effi cacy of natural enemies and their<br />

adaptation to the environment, resistance to insecticides, control of disease vectors, cryopreservation,<br />

and improve the rearing systems. A number of genes have been cloned and<br />

expressed in different insect species (Table 9.3). Various aspects of genetic improvement of<br />

natural enemies through genetic engineering have been discussed below.<br />

Cryopreservation<br />

One of the potential applications of biotechnology is the development of cryobiological<br />

methods for preserving embryos of arthropod biological control agents. Currently, arthropod<br />

biological control agents can be maintained only by continuous rearing or by holding<br />

TABLE 9.3<br />

Novel Genes Cloned for Genetic Manipulation of Insects<br />

Gene of Interest Species References<br />

Acetylcholinesterase (Ace)—pesticide<br />

resistance<br />

Drosophila Hall and Spierer (1986)<br />

Fournier et al. (1989)<br />

Anopheles stephensi Hall and Malcolm (1991)<br />

Hoffmann, Fournier, and Spierer (1992)<br />

Resistance to parathion Cardiochiles diaphaniae Presnail and Hoy (1996)<br />

Parathion hydrolase (opd )—parathion<br />

resistance<br />

Spodoptera frugiperda Dumas, Wild, and Rauschel (1990)<br />

Drosophila melanogaster Philips et al. (1990)<br />

Esterase b1 amplifi cation core—<br />

organophosphate resistance<br />

Culex species Mouches et al. (1986, 1990)<br />

Glutathione S-transferase (MdGST1)— Musca domestica Wang, McCommas, and Syvanen<br />

organohosphate resistance<br />

(1991)<br />

g-Aminobutyric acid A (GABAA)—dieldrin resistance<br />

Drosophila Ffrench-Constant et al. (1991)<br />

Cytochrome (P450-Ba)—DDT resistance Drosophila Waters et al. (1992)<br />

Glutathione S-transferase (DmGST1-1)—<br />

DDT resistance<br />

Drosophila Toung, Hsieh, and Tu (1990)<br />

Metallothionein genes (Mtn)—copper<br />

resistance<br />

Drosophila Theodore, Ho, and Marni (1991)<br />

continued

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!