Bollgard I and Bollgard II technologies are mentioned in the context of

Correct Option

Bollgard I and Bollgard II are genetically modified (GM) technologies applied to cotton plants. These technologies involve the insertion of specific genes, known as cry genes, from the bacterium Bacillus thuringiensis (Bt) into the cotton plant's genome. The purpose of this genetic modification is to enable the cotton plant to produce insecticidal proteins, thereby conferring inherent resistance against certain lepidopteran pests, primarily the cotton bollworm.

Bollgard I technology incorporates the Cry1Ac gene, which targets the cotton bollworm. Bollgard II is an advanced version that contains two Bt genes, Cry1Ac and Cry2Ab. This dual-gene strategy provides broader protection against a wider range of lepidopteran pests and helps in delaying the development of pest resistance, leading to improved crop yields and reduced reliance on chemical pesticides.

Incorrect Options

• Clonal propagation of crop plants: This refers to methods of asexual reproduction that produce genetically identical copies of a plant, such as tissue culture or grafting. It is a technique for plant multiplication and is distinct from genetic modification for pest resistance.
• Production of plant growth substances: Plant growth substances are natural or synthetic organic compounds that regulate plant growth and development, including hormones like auxins, gibberellins, and cytokinins. This area is unrelated to the genetic engineering of crops for pest resistance.
• Production of biofertilizers: Biofertilizers are formulations containing living microorganisms that enhance soil fertility and promote plant growth by processes such as nitrogen fixation, phosphate solubilization, or production of growth-promoting substances. This concept is separate from genetically modified crops.