Finally, the resistance of these transgenic rice lines against other major lepidopteran pests such as yellow stem borer and the leaffolder also need to be evaluated in different rice production locations to define their insect-resistance spectrum. First reports of transgenic insect-resistant plants were only published in 19872,3 but technological develop-ment has been swift since then approximately 40 different genes conferring insect resistance have been incorporated into crops, and the first insect-resistant crops have been commercialized in several countries. Genetically modified rice are rice strains that have been genetically modified (also called genetic engineering) rice plants have been modified to increase micronutrients such as vitamin a , accelerate photosynthesis , tolerate herbicides, resist pests, increase grain size, generate nutrients, flavours or produce human proteins. Transgenic rice plants displayed high level expression in their leaves and result in high effective control of pest of rice in asia the yellow stem borer (ysb) and the striped stem borer (ssb) and feeding inhibition of two leaf folder species.
Transgenic plants exhibited high levels (1–2 point score on 0–9 scale) of resistance to both bph and glh, on a par with those of bph-resistant var ptb33 and glh-resistant var vikramarya, respectively susceptible var tn1 (9 point score on a 0–9 scale), on the other hand, showed complete damage caused by both the insects (figure 5b,c. The majority of insect-resistant transgenic plants produced today about which sufficient information has been published contain antibiotic-resistance genes as the selectable marker genes the most commonly used marker is the bacterial neomycin-phosphotransferase-ii gene [nptii or aph(3′)ii. A plant line with acceptable resistance against one pathogen may lack resistance against others breeding for resistance typically includes: identification of plants that may be less desirable in other ways, but which carry a useful disease resistance trait, including wild plant lines that often express enhanced resistance. The only commercialized insect-resistant transgenic plants to date express genes derived from the bacterium bacillus thuringiensis, but a wide range of genes from higher plants have also been transferred into crop cultivars, especially genes encoding inhibitors of digestive enzymes and lectins the use of resistance genes from other microorganisms and animals has so far been limited.
Plant science 131 (1998) 1 – 11 review transgenic plants for insect resistance lise jouanin a,, michel bonade ´ -bottino a, ce ´ cile girard a, gil morrot a, a,b marc giband. The only commercialized insect-resistant transgenic plants to date express genes derived from the bacterium bacillus thuringiensis, but a wide range of genes from higher plants have also been transferred into crop. Genetic engineering of rice for insect resistance 189 genetic engineering of rice for resistance to homopteran insect pests ja gatehouse, k powell, and h edmonds with the aim of producing transgenic rice plants that would express the foreign protein in their phloem. Here, we developed elite insect-resistant transgenic rice plants that may satisfy the standards of biosafety assessments we made a construct with the insecticide cry1ac gene for a target trait a total of 310 t 0 transgenic lines were generated and underwent extensive analysis.
Transgenic rice plants expressing snowdrop lectin (galanthus nivalis agglutinin gna) were screened for resistance to green leafhopper (nephotettix virescens glh), a major homopteran pest of rice. The transgenic rice plants expressing asa-l were shown to decrease transmission of rice tungro virus by its insect vector, presumably as a result of decreased feeding by the pest (saha et al, 2006b. The amount of gna in the transgenic rice plants was estimated to be 01–03% of total leaf soluble proteins, in comparison with gna standards on the blots. Transgenic plants expressing proteinase inhibitors act on insects as growth retardant, when feeds on the plant several plants, particularly pulses contains substantial amount of inhibitor proteins.
Expression of the man-specific snowdrop lectin (gna) in transgenic rice plants using constitutive or phloem-specific promoters gave plants that were partially resistant to rice brown planthopper (nilaparvata lugens) and other hemipteran pests. Genetic engineering of rice for insect resistance 189 genetic engineering of rice for resistance to homopteran insect pests ja gatehouse, k powell, and h edmonds the rice brown planthopper (bph nilaparvata lugens) is a serious pest of rice crops throughout asia, damaging plants both through its feeding behavior and by acting as a virus vector.
Review and prospect of transgenic rice research authors authors and affiliations in transgenic rice plants confers resistance to two major rice insect pests mol breeding burnell j n, et al changes in photosynthetic carbon flow in transgenic rice plants that express c4-type phosphoenolpyruvate carboxykinase from urochloa. Production of insect-resistant transgenic rice plants for use insect-resistant transgenic rice plants that can be used in practical agriculture keywords biotechnology bt intergenic insertion rice transgenic crop introduction the transgenic rice plants produced by.
Potential exploitation of lectin genes to confer insect resistance in transgenic plants has targeted hemipteran plant pests, the transgenic rice plants expressing asa-l were shown to decrease transmission of rice tungro virus by its insect vector, the production of transgenic insect-resistant plants, and their continuing development. The new technology of plant genetic engineering offers the possibility of introducing resistance genes from foreign species into crop plants different approaches to obtain insect-resistant plants are presently being explored.