Construction of genetic maps for some Eurasian coniferous species using allozyme genes

In an analysis of allozyme genes in three pine and one spruce species distributed in Eurasia, 45 of 87 loci were mapped. Four linkage groups inPinus sylvestris andPicea abies, three inPinus pallasiana, and two inPinus pumila were determined. The order and the locations of homologous genes in the linkage groups in the different species were similar. The data suggest that during the separate development of thePinus andPicea genera that has lasted for millions of years, there was not any large inversion, translocation, or other significant chromosomal change, at least in the gene blocks analyzed.