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Linkage maps for parent 1 (a) and parent 2 (b), including both eggs and sperm for each parent. (c,d) Estimated recombination fractions (above diagonal) and LOD scores (below diagonal). Red and blue indicate strong and weak linkage, respectively. Numbers of markers are shown in Latin numbers and LGs in Roman numerals. The occurrence of a large non-recombining region is revealed by a bold red square that covers a large proportion of LG VIII in both parents (highlighted).
