Introgression The movement of genes from one population into another through hybridization followed by backcrossing. Usually refers to movement of genes from one species to another or among sub-species that have been geographically isolated then brought back together by changes in the species ranges or planting of exotic populations.

Locus 1. The position of a gene on a chromosome in a linkage group or on a chromosome map.

Meristem The undifferentiated formative or generative cells of plants which give rise to daughter cells capable of further division, the cells found in the cambium or growing points capable of further development. (not really sure if this one belongs in here but just in case)

Ortet The original plant from which a clone is started through rooted cuttings, grafting, or tissue culture, or other means of vegetative propagation. The original tree used to start a grafted clone for inclusion in a seed orchard is the ortet.

Hope this isnt annoying
One love
c