The increasing destruction of natural areas, the construction of streets and highways, the advance of monoculture, soil desertification and climate events appear among the main causes of extinction of plant species.

Faced with these threats, botanical scientific institutions in different countries, sometimes supported by governments, ordered the building of seed banks for conservation purposes. There are hundreds of germplasm (seeds) to plant throughout the world, and this represent one choice to face the food problem.

Seed storage is an ancient practice, perhaps since the implementation of agriculture and the time when humans become sedentary. The people today have principally seeds to beans, rice, beans, corn and other seeds in the cupboard, genebanks (seeds) store large quantities for years in differents parts to Mexico as like Oaxaca.

The first seed banks were born in the nineteenth century as centers of study and knowledge of the evolution of plants. From the second decade of the twentieth century dawned conservationist target face to  threats of modern life. So at the time that some plant species cease to exist in their natural habitat, preservation of seeds would play it again in the field.

In the case of maize, Mexico has a lot of improved varieties, traditional and wild relatives or landraces that are grown in different regions over time rural and indigenous communities have achieved this diversity represents a legacy for humanity, and today this is part of the biocultural heritage to Mexico.

Native seeds are part of the culture of the indigenous peoples,this seed are maintained and improved by the communities themselves through the selection of the strongest and most resistant plants that are part of the culture of each society.

These seeds contain a high genetic variability and are key in maintaining food self-sufficiency, as they are fertile after several generations, contrary to what happens with commercial seed, which must be purchased at a high price in each planting season with high economic costs, this comercial seed limiting the organizational capacity of the rural sectors, making them dependent on these trading companies as like Monsanto.

the native seeds have been kept and maintained by peasant groups over generations and represent a knowledge of high importance for food production. It is extremely important to recover and strengthen farmers' knowledge about the use, features and forms of production with native seeds.

It is important that the Mexican government take steps to safeguard the maize and Protect all existing varieties, through the public policies to protect the relationship between the maize and the cultural heritage of the Mexican people.