How can people implement new diversity into the gene pool, with genes that would create a stronger species?

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trophyhunter1 | College Teacher | (Level 1) Educator Emeritus

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Sometimes in agriculture, year after year, the same crop species is grown. This is purposefully planted for whatever traits are desired by the farmer to sell at market. However, these plants may not be the best adapted for the environment and if something changes, for example, the climate, the amount of moisture or even a new pest invading the habitat, the crop yield may decrease or the crop may even fail. To enhance the gene pool, sometimes the crop is crossed with a wild variety. The wild variety may possess resistant genes to a particular pest, or be able to withstand a drier climate. By cross-breeding with the wild variety, the hope is that this will result in a hybrid which has more vigor and is better adapted for survival.

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