What are genetic resources and why are they conserved? Genetic resources for agriculture, forestry and fishery include crop plants and their wild relatives, domestic animal breeds, forest trees and fish species. Genetic resources are both ecologically and economically significant components of biodiversity. The most important reason for their conservation is to develop the economic and sustainable use of natural resources and to improve the quality of end products. This includes preparedness for changes in the agricultural, forest and aquatic environments. Genetic resources are the basis for plant and animal breeding.