The greatest threat to genetic diversity in a | vedclass

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(A) The correct answer is $A$. The introduction of high-yielding varieties (HYVs) is considered the greatest threat to genetic diversity in agricultur

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introduction of high yielding varieties

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(A) The correct answer is $A$. The introduction of high-yielding varieties (HYVs) is considered the greatest threat to genetic diversity in agricultural crops. This is because the widespread adoption of a few genetically uniform high-yielding varieties often leads to the replacement and loss of traditional,locally adapted,and diverse crop varieties (landraces). This process,known as genetic erosion,significantly reduces the overall genetic diversity within the agricultural ecosystem. While the extensive use of fertilizers,insecticides,and pesticides can negatively impact soil health and local ecosystems,the replacement of diverse germplasm with uniform HYVs has a more direct and irreversible impact on genetic diversity.

The greatest threat to genetic diversity in agricultural crops is

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