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<blockquote data-quote="Big Al" data-source="post: 1759797" data-attributes="member: 42762"><p>You may not have seen this article. <a href="https://modernfarmer.com/2021/12/the-great-american-chestnut-tree-revival/" target="_blank">https://modernfarmer.com/2021/12/the-great-american-chestnut-tree-revival/</a></p><p></p><p>This is the first place that I see someone announcing that the TACF hybrid program<strong> did not work, and why it will not work!</strong>!! <strong>This holds true for any of the hybrid trees. The blight resistance in a hybrid tree is directly proportional to the % of Chinese genes.</strong></p><p><strong></strong></p><p><strong></strong></p><p> <strong>""One method utilized by the American Chestnut Foundation is known as backcross breeding. For this method, scientists select and move desirable characteristics from one variety to another. The goal is to isolate the blight-resistance genes from another species and incorporate them into the genetic makeup for American chestnut trees. Leila Pinchot, a research ecologist for the US Forest Service who specializes in reintroducing chestnut trees into the forest, explains backcross breeding as an "approach to incorporate the genes for resistance from Chinese chestnut with the American Chestnut because what we want is a tree that looks and acts American." </strong></p><p><strong>Pinchot explains that this method, as shown by geneticist Jared Westbrook's research for the American Chestnut Foundation, turned out to not be the solution in the case of the chestnut tree. The goal of backcross breeding is to isolate two or three genes, but in the case of the chestnut, "there are so many genes for resistance in the Chinese chestnut, that it's just not feasible to combine those with the American chestnut and produce a tree that's mostly American, but still incorporates the genes for resistance from Chinese," says Pinchot.""</strong></p></blockquote><p></p>
[QUOTE="Big Al, post: 1759797, member: 42762"] You may not have seen this article. [URL]https://modernfarmer.com/2021/12/the-great-american-chestnut-tree-revival/[/URL] This is the first place that I see someone announcing that the TACF hybrid program[B] did not work, and why it will not work![/B]!! [B]This holds true for any of the hybrid trees. The blight resistance in a hybrid tree is directly proportional to the % of Chinese genes. ""One method utilized by the American Chestnut Foundation is known as backcross breeding. For this method, scientists select and move desirable characteristics from one variety to another. The goal is to isolate the blight-resistance genes from another species and incorporate them into the genetic makeup for American chestnut trees. Leila Pinchot, a research ecologist for the US Forest Service who specializes in reintroducing chestnut trees into the forest, explains backcross breeding as an "approach to incorporate the genes for resistance from Chinese chestnut with the American Chestnut because what we want is a tree that looks and acts American." Pinchot explains that this method, as shown by geneticist Jared Westbrook's research for the American Chestnut Foundation, turned out to not be the solution in the case of the chestnut tree. The goal of backcross breeding is to isolate two or three genes, but in the case of the chestnut, "there are so many genes for resistance in the Chinese chestnut, that it's just not feasible to combine those with the American chestnut and produce a tree that's mostly American, but still incorporates the genes for resistance from Chinese," says Pinchot.""[/B] [/QUOTE]
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