gentic diversity play vital role and allow population to adapt to changes in environment.
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La diversidad genética es el número total de características genéticas dentro de cada especie. A mayor diversidad genética, las especies tienen mayores probabilidades de sobrevivir a cambios en el ambiente. Las especies con poca diversidad genética tienen mayor riesgo frente a esos cambios.
la actividad humana es la principal causante de la erosión genética de plantas y animales debido que solo quiere que sobrevivan algunas especies de animales haciendo que no todos tengan la oportunidad de vivir, esto puede causar una desorganizacion biológica. según la biodiversidad genética las comunidades o individuos tienen la oportunidad de vivir.
Genetic diversity is important because it gives plants the ability to withstand harsh conditions.
What is plant breeding?
Why is biodiversity Important?
Genetic variation is central to biological diversity and the evolution of organisms.
Whereas ecosystem diversity is a measure of variability among populations of species, genetic diversity refers to variability among individuals within a single species population. A gene represents the fundamental physical unit of heredity, and each individual in a species a different mix of genes. This genetic diversity, or variation within species, allows populations to adapt to changes in environmental conditions.
This genetic diversity, or variation within species, allows populations to adapt to changes in environmental conditions. Millions of years of adaptive change may be encoded in the genes of a species population, and it is those genes that provide the basis for future adaptations.
Loss of genetic diversity makes a species less able to reproduce successfully and less adaptable to a changing environment.
Small populations of species are especially susceptible to loss of genetic diversity. When a species loses too many individuals, it becomes genetically uniform.
Some of the causes for the loss in genetic diversity include:
• inbreeding among closely related individuals, and
• genetic drift in which the genes of a few individuals eventually dominate in a population.
Genetic diversity is important to agriculture. Much of the world's agriculture is based on introduced or hybrid crop strains, as opposed to native or wild strains. The main purpose of using hybrid strains is to increase productivity. Unfortunately, this results in only a few hybrid crop strains being used for commercial agriculture.
These hybrid crops lack the genetic diversity of the many wild strains, and the resistance of hybrids to pests and disease is generally much lower. Therefore, it is necessary to protect and conserve the wild strains as a genetic library, from which one can draw the genetic information necessary for producing improved and more resistant hybrid strains.
A similar situation exists in livestock breeding, except that the loss of genetic diversity in livestock has even more severe consequences.
Many livestock breeds are near extinction because of the policy of favoring a few specialized breeds. It is clear that human activity is primarily responsible for the genetic erosion of plant and animal populations.
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