X hits on this document

PDF document

United States Department of Agriculture - page 23 / 36





23 / 36

For all diseases and pathogens surveyed, names of the diseases and the scientific names of the pathogens should be provided. Data from field tests in foreign countries are acceptable. If the data on diseases and pests were obtained in the foreign country, the applicant should submit information about the distribution of those pests, disease or pathogens in U.S.. Disease and pathogen susceptibility on wild type and transgenic plants should be determined preferably from natural infestations. However, if applicant must use direct inoculations; i.e., with virus resistant transgenic plants, the source and taxonomic classification of the virus should be provided.

SAMPLE PETITIONHerbicide-Tolerant Plants

D. Disease and Pest Resistance Characteristics

The transformed cotton plants were field-tested for 3 years at ten sites in five States (see data reports 93–1, 94–1, 95–1 in appendix). Based on field observation at these sites, pathogen- susceptibility or resistance characteristics of the transformed cultivar were unchanged when compared to those of the nontransformed cultivar. The transformed cultivar remains resistant or tolerant to bacterial blight (Xanthomonas campestris pv. malvacearum), Anthracnose boll rot, and Fusarium wilt–nematode complex rot. The transformed cultivar remains susceptible to Alternaria leaf spot, Cercospora leaf spot, and powdery mildew, as was the nontransformed cultivar.

E. Mycotoxins

Aflatoxins are most commonly found in food and feed commodities contaminated by Aspergillus flavus. Aflatoxins are the only contaminants of feeds and food routinely monitored. Banjaran was not any more susceptible to mold infection than its parent cultivar and was not going to be a source of mycotoxins.

F. Gossypol

Gossypol is a yellow pigment that occurs in various parts of the cotton plant. Cotton seed usually contains 0.4 percent to 1.7 percent gossypol (Abou-Donia, 1976). When present in untreated cottonseed meal, gossypol is toxic to animals. When cottonseed meal is processed under heat and moisture, most of the free gossypol is removed by solvent extraction or detoxified by the condensation of the aldehyde groups of gossypol with the free amino groups of proteins to form nonextractable (bound) gossypol. Flavanoids which are not major constituents in cotton were also measured because they can be toxic if eaten in large amounts. The amount of free or bound gossypol in the meal did not differ significantly between the transformed and nontransformed cultivars (Table 2).


Document info
Document views142
Page views142
Page last viewedTue Jan 24 15:36:14 UTC 2017