transgenic crops

Views:
 
Category: Education
     
 

Presentation Description

No description available.

Comments

Presentation Transcript

PowerPoint Presentation:

w e l c o m e * ** * ** ****

PowerPoint Presentation:

Transgenic crops ******** **********

Outline:

Outline What Are Transgenic Plants? What is the need of transgenic plants? Status of Transgenic crops in world How are Transgenic Crops Made? Popular transgenic crops Should We Use Transgenic Crops?

PowerPoint Presentation:

A transgenic crop plant contains a gene or genes which have been artificially inserted instead of the plant acquiring them through pollination. The inserted gene sequence (known as the transgene ) may come from another unrelated plant, or from a completely different species: transgenic Bt corn, for example, which produces its own insecticide, contains a gene from a bacterium. Plants containing transgenes are often called genetically modified or GM crops , although in reality all crops have been genetically modified from their original wild state by domestication, selection and controlled breeding over long periods of time. What Are Transgenic Plants?

Why Make Transgenic Crop Plants?:

Why Make Transgenic Crop Plants? Aplant breeder tries to assemble a combination of genes in a crop plant which will make it as useful and productive as possible. Depending on where and for what purpose the plant is grown, desirable genes may provide features such as higher yield or improved quality, pest or disease resistance, or tolerance to heat, cold and drought. This powerful tool enables plant breeders to do what they have always done - generate more useful and productive crop varieties containing new combinations of genes - but it expands the possibilities beyond the limitations imposed by traditional cross-pollination and selection techniques.

Over 5.5 million farmers are growing over 15 different transgenic crops on 52.6 million hectares all over the world.:

Over 5.5 million farmers are growing over 15 different transgenic crops on 52.6 million hectares all over the world.

Rapeseed (Brassica napus)(Rapa):

Rapeseed ( Brassica napus )(Rapa)

Procedure in production of Transgenic crops:

Procedure in production of Transgenic crops

PowerPoint Presentation:

Popular Transgenic Crops

Golden Rice:

Golden Rice Golden Rice technology is based on a simple principle. Notwithstanding the fact that rice plants synthesise β-carotene in vegetative tissues but not in the grain, all but two steps of the biosynthetic pathway are present in the grain. By addition of only two genes, phytoene synthase ( psy ) and phytoene desaturase ( crt I) , the pathway is reconstituted and β-carotene is consequently accumulated in the endosperm, ie the edible part of the grain.

Transgenic Soybean Roundup Ready® or Liberty Link® varieties:

Transgenic Soybean Roundup Ready ® or Liberty Link ® varieties Roundup ® (chemical name: glyphosate) or Liberty ® (glufosinate) Weed-infested soybean plot (left) and Roundup Ready® soybeans after Roundup treatment. Source: Monsanto Roundup Ready® soybeans Weed-infested soybean plot

Corn hybrid with a Bt gene (left) and a hybrid susceptible to European corn borer (right). Source: Monsanto:

Corn hybrid with a Bt gene (left) and a hybrid susceptible to European corn borer (right). Source: Monsanto Corn hybrid with a Bt gene Susceptible hybrid

Range of damage due to corn rootworm feeding, from severe (left) to no damge (right). Source: USDA:

Range of damage due to corn rootworm feeding, from severe (left) to no damge (right). Source: USDA Corn rootworm feeding on a young maize root Corn rootworm ( Diabrotica spp.)

Bt Cotton:

Bt Cotton Bollworm ( Helicoverpa) Cry 1Ac gene of Bacillus thuringiensis

Image: Results of insect infestation on Bt (right) and non-Bt (left) cotton bolls. Source: USDA:

Image: Results of insect infestation on Bt (right) and non-Bt (left) cotton bolls. Source: USDA

Bt Brianjal:

Bt Brianjal Brinjal fruit and shoot borer ( Leucinodes orbonalis ) Fruit borer ( Helicoverpa ) Infested brinjal

Transgenic tomato:

Transgenic tomato The researchers inserted a yeast gene , called ySAMdc , into tomato plants. They engineered the gene so that it would be activated in the fruit but not the rest of the plant. extended shelf life Good color

Advantages:

Advantages Resistance to biotic stress( insects,diseases,viruses ) Resistance to abiotic stress Herbicide resistance Improved quality Male sterile crops High yield Cheap to maintain disease resistant species High adaptability

Disadvantages:

Disadvantages Allergic reactions reducing the numbers of pest insects in farmland and impacting biodiversity. significant negative impact on wildlife( wider effects on food chains ) Chance of developing resistance in weeds (uncontrollable weeds)

PowerPoint Presentation:

Outcrossing of transgenic plants not only poses potential environmental risks , it may also trouble farmers and food producers. Many countries have different legislations for transgenic and conventional plants as well as the derived food and feed, and consumers demand the freedom of choice to buy GM-derived or conventional products. Therefore, farmers and producers must separate both production chains. This requires coexistence measures on the field level as well as traceability measures throughout the whole food and feed processing chain. Research projects such as Co-Extra , SIGMEA and Transcontainer investigate how farmers can avoid outcrossing and mixing of transgenic and non-transgenic crops, and how processors can ensure and verify the separation of both production chains. Agricultural impact of transgenic plants

I THINK THE FUTURE OF THESE GM CROP IS EXCITING ONCE WE GET EVERYTHING RIGHT…..:

I THINK THE FUTURE OF THESE GM CROP IS EXCITING ONCE WE GET EVERYTHING RIGHT…..

PowerPoint Presentation:

Presented by A.Bharath RA/08-07 N.Mahesh RA/08-28 G.Bheemesh RA/08-10 T.Jayaprakash RA/08-17 D.Karthik RA/08-20

PowerPoint Presentation:

T h a n k u

authorStream Live Help