The United States this week became the single largest party to a U.N. agreement under which countries allow researchers from other member states free access to their crop gene banks - collections of varieties of seeds, plants and roots.
By joining, the United States adds more than 570,000 types of maize, wheat, potatoes, and other crops to the 1.5 million varieties available under the treaty's sharing system managed by the U.N.'s Food and Agriculture Organization (FAO).
"The quality and size of gene bank contributions by the United States will further the progress of scientific research," CGIAR, a global agricultural research organisation, said in a statement.
As farmers worldwide experience more frequent drought and erratic rainfall linked to global warming, scientists are racing to find crops capable of tolerating increasingly high temperatures, water shortages and dry conditions.
Access to a large pool of seeds is vital for researchers to choose the best varieties to cross and create new strains resistant to pests, disease and drought, while also improving yields to help feed a growing population, according to FAO.
"Biodiversity can help us face the impacts of climate change," said FAO Director-General Jose Graziano da Silva in a statement marking the U.S. accession to the International Treaty on Plant Genetic Resources for Food and Agriculture.
If a plant bred with seeds shared under the multilateral system is commercialized, part of the profits must be paid into a trust fund benefiting farmers in the developing world.
Read more at Research for Drought-Resistant Crops Gets Boost
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