research institutes disadvantages advantages gamma garden classification characters history mutation bt brinjal breeding needs agriculture production bt corn au brinjal bt cotton stress management biotic and abiotic stress sustainability production agriculture industrial pollution fossil fuels burning infrared radiation water vapour green house gases food web biological diversity bromine cfc ozone depletion green house effects impacts global warming biodiversity climate change critically endangered species flora and fauna biodiversity conservation least concern species plants in red data book vulnerable species threadened species extinct species endangered species objectives of red data book red data book history category of red list red list iucn red data book types of mutation pleiotropy types screening mutants varieties released mutation - polygenic trait mutation -oligogenic traits application chemical mutagens physical mutagens mutagens achievements steps mutation breeding
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