Genetic differences in recombination frequency in the pig (Sus scrofa).
A comparison has been performed on 3 recently published linkage maps of the pig, hereafter designated as the American (A), European (E), and Swedish (S) maps. The cumulated distances between common markers in these 3 maps were in the ratio 1.00 (A):0.88 (E):0.77 (S), in keeping with the ratio of the percentages of domestic genome in the reference families used to build the corresponding maps, i.e., 1.00 (A):0.81 (E):0.50 (S). From further recombination frequencies reported in wild boars (in the S report), the wild pig genome length (in centimorgans) is expected to represent 66% of the domestic pig genome length. These observations tend to confirm a general result of Burt and Bell (Nature (London), 326: 803-805 (1987)), showing higher chiasma frequencies in domestic mammalian species compared with wild species. Consequences for mapping studies are discussed.
Ollivier
L
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Station de Génétique Quantitative et Appliquée, Institut National de la Recherche Agronomique, Jouy-en-Josas, France.
D000818:Animals; D005260:Female; D008040:Genetic Linkage; D008297:Male; D011995:Recombination, Genetic; D013552:Swine / Q000235:genetics*