DiMaio, former Massachusetts chief forester, and Bruce Spencer, former Quabbin Reservoir chief forester, both members of the Massachusetts/Rhode Island Chapter of the American Chestnut
It might seem like a difficult job for someone who has an affinity for the American chestnut
, but Rea knows it's necessary.
Early American chestnuts
were small and flavorful and were abundant in late fall.
The idea came from the forestry department's plan to help American chestnut
trees by plugging of resistant stock to diseased trees to save them.
Of these flowers, 9 were B[C.sub.1][F.sub.3],7 were B[C.sub.2][F.sub.3], and 7 were American chestnut
. To assess differences in the accumulation of metals and arsenic in soils by tree type, soil sampling locations were randomly selected across plots and collected at the drip line of 36 seedlings (12 per tree type).
Her claim that "Restoring the American chestnut
through genetic engineering adds about a dozen foreign genes to the 38,000 or so in its genome" needs some clarification.
For all intents and purposes, there are American chestnuts
and Chinese chestnuts, as well as hybrids of the two.
That tree was the American chestnut
, Castanea dentata.
Before a fungal blight ((Cryphonectria parasitica)) effectively wiped out the American chestnut
tree population in the eastern United States, there once were nutrient-rich American chestnut
(Castanea dentata) trees supporting communities through food and industry, blanketing the landscape with all the prominence of large trees with broad crowns.
We see no better example of that than the planting in Worcester's Green Hill Park this past Arbor Day, of 15 "back-crossed'' American chestnut
The American chestnut
almost was wiped out in the 20th century.
The American chestnut
, Wallace says, was once the most prolific tree in America covering more than 30 million acres from southern Maine to Georgia and west to the Mississippi.
Some papers are on conservation topics, such as genetic research to import blight resistance to save the American Chestnut
. Others are devoted to engineering, such as the idea that special trees could be produced to stop the spread of deserts.
This more prosaic form of deextinction is exemplified in the movement to restore the American chestnut
tree (Castanea dentata) using plant breeding techniques.