| Each generation of
trees is inoculated with blight fungus and
selected for resistance and American
characteristics. Each backcross generation
requires a minimum of 5 years to complete.
The F1 generation can be completed in 3
years.
Definition- F1 -
Offspring of crossing two genetically different
parents (ie. Chinese x American)
F2 - Offspring
of two mated F1 trees
BC1 - Offspring
of crossing an F1 with one of its
parent types
BC2 - Offspring
of crossing BC1 with same type of
parent
BC3F2 - Offspring
of crossing two third backcross trees,
(BC3 x BC3)
([{Chinese x Am.} x Am.] x Am.) x
American X ([{Chinese x
Am.} x Am.] x Am.) x American
*This percentage of highly
resistant trees is a hope of The American Chestnut
Foundation. It is based upon certain
scientific assumptions and cannot be proven at
this time. |
