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none great essay GENETIC DIVERSITY IN AGRICULTURE                                                                                                            Genetic variation is the raw material for the plant breeder, who must often select from primitive and wild plants, including wild species, in search of new genes. The appearance of new diseases, new pests, or new virulent forms of disease causing organisms makes it imperative that the plant be preserved, because it offers a potential for the presence of disease resistant genes not present in cultivated varieties. Also, …

…lean bacon instead of lard, and small and broad breasted turkeys.         Artificial insemination has become a major factor in cattle improvement. In this technique the sperm of genetically superior bulls is used to inseminate thousands of cows. In this way a herd can be upgraded significantly in a single generation. However, some people feel that producing plants and animals that conform to the needs mechanization and increased production has resulted in less desirable farm products.