Variation in the PGI/AAT linkage group between populations of black spruce

Linkage analysis, using megagametophytes from a clonal seed orchard of black spruce (Piceamariana (Mill.) B.S.P.) detected a tight association between Pgi-2 and Aat-1 with a recombination frequency of 2.6%. This is in marked contrast to earlier estimates for this species, which were much greater. The present results suggest that black spruce may be comparable with numerous other conifer species demonstrating this particular, highly conserved association.