linkage map
Technical term in genetics/biology: a map showing the relative positions of genes on a chromosome based on recombination frequencies.
The researchers identified the gene locations using a linkage map.
染色体地図 (chromosome map) is a broader term that may include physical maps, while 連鎖地図 specifically refers to a map based on genetic linkage.
Compound of 連鎖 (れんさ, 'linkage') and 地図 (ちず, 'map'). The term is a direct translation of the English 'linkage map' used in genetics.