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TH E concept of heritability is well established among geneticists and practical breeders, but the information on the heritability of production traits is still quite fragmentary, especially in turkeys. This paper reports heritability estimates of 25-week body weights in Broad-breasted Bronze and White Holland tur-keys. A survey of the literature reveals only a few estimates of the heritability of body weight in turkeys. An estimate of about 0.23 was calculated for 26-week old male turkeys by Kentucky researchers (1950). This estimate was obtained by the in-trasire regression method after correction was made for age (date of hatch?). Ab-planalp and Kosin (1952), utilizing data from Broad-breasted Bronze and Belts-ville Small Whites, calculated estimates by intraclass correlation and offspring-dam regression methods at 4, 8, 14 and 26 weeks of age. Their estimates vary con-siderably because of age, sex and environ-mental (climatic) factors, bu t their most reliable restimates were in the medium to high range (0.16 to 0.71). Other estimates may be calculated from data reported in the literature (Asmundson, 1948), but such a procedure can be precarious be-cause of the inherent vagaries of most sets of data