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ESTIMATING QUANTITATIVE TRAIT HERITABILITY FOR TILAPIA NILOTICA OF DIFFERENT MONTHS
Author(s): 
Pages: 1180-1185
Year: Issue:  5
Journal: Oceanologia et Limnologia Sinica

Keyword:  Tilapia niloticafull-sibs familyquantitative traitsheritability;
Abstract: We established 30 half-sib families of Tilapia nilotica in a balance nest design. The quantitative traits, including body weight, total length, body length, head length, trunk length, body depth, caudal peduncle length, caudal peduncle depth, and body width of each family were measured in age of 3, 4, and 5 months, to estimate the heritability of the quantitative traits in half-sib families theory. Results show that the heritability for 3-month-old fish was 0.73—0.21 greater than those of 4-month-old for 0.21—0.06 and 5-month-old for 0.25—0.05. Therefore, the heritability decreased with the months. The results provide useful information for T. nilotica breeding.
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