Scientists probe genetic component of climate-hardy species

ClimateWire: Douglas firs have more than 38,000 genes, roughly twice the number in the human genome. So any gene that has helped those trees survive extreme drought, heat and disease has been passed down through generations of seedlings. "I think of them as the ultimate genomic pack rat," said Richard Cronn, a research geneticist at the Forest Service's Pacific Northwest Research Station. "They save everything, and they have been saving things for millions of years. You never know when you are going to have......

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