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“KUNMING, China (AP) _ Zeng Yawen's outdoor laboratory in the terraced hills of southern China is a trove of genetic potential — rice that thrives in unusually cool temperatures, high altitudes or in dry soil; rice rich in calcium, vitamins or iron.

"See these plants? They can tolerate the cold," Zeng says as he walks through a checkerboard of test fields sown with different rice varieties on the outskirts of Kunming, capital of southwestern China's Yunnan province.

"We can extract the cold-tolerant gene from this plant and use it in a genetically manipulated variety to improve its cold tolerance," Zeng says.

In a mountainous place like Yunnan, and in many other parts of the developing world, such advantages can tip the balance between hunger and a decent living. And China is now ready to tip that scale in favor of genetically modified crops.

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