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TACF is no longer supporting development of D58 American chestnut trees

tacf.org

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Re: TACF is no longer supporting development of D58 American chestnut trees

#51
post #37
post #36

Earlier quoted context omitted.

Yes. I planted three of those plants (small bare root things) on my property this year.

See I always thought it was two groups doing separate projects and was surprised to see the other one mentioned on their web page. Are they doing okay?

Ok so far!

Re: TACF is no longer supporting development of D58 American chestnut trees

#52
post #9

There is a pretty fascinating correlation here between growth rate and susceptibility to mortality from the fungal infection. Remove the toxicity of oxalic acid and suddenly growth rate reduces. Obviously there’s a ton of variables but, oversimplifying, it almost seems like a deal with the devil: increase growth rates but at the cost of increased mortality to the blight.

The 35S promoter is a really strong constitutive promoter. Just expressing the OxO gene from it could be enough of a metabolic cost as to be noticeably growth inhibitory, much less the effect of the unintentional gene knockout.

It looks like they have a good plan for future engineering: Induced expression only in cells in the infected part of the tree.

Re: TACF is no longer supporting development of D58 American chestnut trees

#53

Earlier quoted context omitted.

I saw a video on this recently. It's super sad that such a magnificent tree (along with the American Elm) have been completely destroyed. So much majesty gone.

Green ash is currently under attack and will be gone within the decade.

Not familiar with that one, but sad to hear about.

It wasn't until I started growing apple trees that I realized how crazy hard it is to grow some trees. They're susceptible to insects, fungus, drought, flood, animals...etc.

Re: TACF is no longer supporting development of D58 American chestnut trees

#54

Earlier quoted context omitted.

I saw a video on this recently. It's super sad that such a magnificent tree (along with the American Elm) have been completely destroyed. So much majesty gone.

Green ash is currently under attack and will be gone within the decade.

It's all ash trees that are at risk.

The pest is the emerald ash borer. Emerald refers to the color of the beetle. It's emerald ash_borer, not emerald_ash borer.

Re: TACF is no longer supporting development of D58 American chestnut trees

#56
post #31

The headline here does not come from the original article and is misleading. The actual article title is "Darling D58". The closest subheading matching the title given here is "Why TACF is No Longer Supporting Development of D58 or Deregulation of the Darling Line." The American Chestnut Foundation is still most certainly pursuing its mission to reseed America with blight-resistant seeds. Just they've discovered that…

I saw a video on this recently. It's super sad that such a magnificent tree (along with the American Elm) have been completely destroyed. So much majesty gone.

I became really interested in this topic after having my first roast chestnuts a couple years ago! Some of the interesting things I learned: - Chestnut deforestation due to blight was a substantial portion of global deforestation in the early 20th century (IIRC half in 1920s and 1930s). - Chestnuts were such a staple that they were considered poor people food in America. Some lamented that chestnut products (including chestnut flours) seemed to be all the general stores carried. - The majority of all wood construction in early America was chestnut.

Wild that such a central part of American society vanished and I didn't even know beyond "chestnuts roasting on an open fire". Makes me wonder what other parts of our lives and culture will be lost with extinctions caused by climate change.

Re: TACF is no longer supporting development of D58 American chestnut trees

#57

Earlier quoted context omitted.

I saw a video on this recently. It's super sad that such a magnificent tree (along with the American Elm) have been completely destroyed. So much majesty gone.

I became really interested in this topic after having my first roast chestnuts a couple years ago! Some of the interesting things I learned: - Chestnut deforestation due to blight was a substantial portion of global deforestation in the early 20th century (IIRC half in 1920s and 1930s). - Chestnuts were such a staple that they were considered poor people food in America. Some lamented that chestnut products (includin…

wild, but also reassuring that within a generation or two a change like this (and there will be many more coming with climate change) can be adapted to and forgotten.

Re: TACF is no longer supporting development of D58 American chestnut trees

#58

Earlier quoted context omitted.

I saw a video on this recently. It's super sad that such a magnificent tree (along with the American Elm) have been completely destroyed. So much majesty gone.

Green ash is currently under attack and will be gone within the decade.

Yep, had four dead ash cut down last year and a whopping 22 dead ash cut down a few weeks ago. The grub form of the ash borer can be found in the firewood rounds.

Re: TACF is no longer supporting development of D58 American chestnut trees

#59
post #31

The headline here does not come from the original article and is misleading. The actual article title is "Darling D58". The closest subheading matching the title given here is "Why TACF is No Longer Supporting Development of D58 or Deregulation of the Darling Line." The American Chestnut Foundation is still most certainly pursuing its mission to reseed America with blight-resistant seeds. Just they've discovered that…

Fair! I was trying to be both succinct and communicate the setback to someone who might not follow the details. For those who might know TACF is working on seeds and makes them (with some hoops) attainable to the public, ceasing that distribution is the news.

Re: TACF is no longer supporting development of D58 American chestnut trees

#60

Earlier quoted context omitted.

This was often NOT done in many transgenic experiments 20 to 30 years ago. In mice transgenic insertions and inadvertent disruption of genes near the transgene insertion are only occasionally disruptive. The reelin gene disruption is a good example. This work was started long before cheap whole genome sequencing. However, comments are right—it was never too hard to examine the flanking sequence around the insertion s…

> There are not that many. Ballpark how many is not that many?

Under 20 is my understanding.
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