Pure line of crops are produced through continuous

A pure line of crops is a type of crop that has been carefully selected and bred to have the same desirable traits from generation to generation. This ensures that the crop consistently produces the desired characteristics, such as high yield, disease resistance, or flavor.

To create a pure line of crops, a process called inbreeding is used. Inbreeding involves mating plants that are closely related, such as siblings or parent and offspring. This is done to increase the chances of offspring inheriting the desired traits from their parents. Through several generations of inbreeding, plants with the desired traits are selected and allowed to reproduce, while those without the desired traits are discarded. This helps to establish a stable and uniform population of plants with the desired traits.

The other options listed in the question, such as selection, hybridization, and crossbreeding, are also important breeding techniques in agriculture. However, these methods are used to introduce new traits into a crop population or to create new varieties, rather than producing pure lines.

Selection involves choosing individual plants with desired traits from a population and allowing them to reproduce, thereby increasing the frequency of those traits in subsequent generations. Hybridization involves crossing two different varieties or species of plants to create offspring with a combination of traits from both parents. Crossbreeding, on the other hand, refers to the deliberate mating of two different individuals within the same species to create offspring with desired traits.

In summary, a pure line of crops is produced through the process of inbreeding, which involves mating closely related plants to establish a population with consistent and desirable traits.