PowerPoint Presentation - The American Chestnut Foundation’s Breeding Program

Conclusions

•Two progeny per B3 family gives lower inbreeding than one

•At least nine to ten B3-F2 progeny are needed per B3 family to capture most alleles

•If each of those nine to ten sets of B3-F2 progeny is segregated in a separate orchard, inbreeding at F4 is reduced

•Inbreeding is not strongly affected by available “mating designs,” in part because we use open pollination

•The American Chestnut Foundation’s breeding program will yield adequate effective population sizes (although the projections have a number of assumptions that will not hold true, decreasing the projected Ne)