Estimation of genetic parameters is essential for designing breeding programs and employing appropriate selection methods for important economic traits. In Iran, sheep breeds have different dispersal depending on the climatic condition which in northeast to southeast of Iran and especially in Khorasan region, Baluchi breed have the highest number due to being resistant to poor environmental conditions and low quality pasture. The heritability parameter in different research has been collected very differently and with a very large range (0.017-0.45). This large range was largely due to syntactic estimation of different parameters, different formulas, and different data numbers. This research aimed to achieve a value for weaning weight of Baluchi sheep by meta-analysis. Data from 26 published papers were analyzed with CMA software version 3. Information extracted from each article included: heritability of weaning weight and genetic and phenotypic correlations between weaning weight and traits production. Result: The weighted average for heritability of weaning weight trait ranged from 0.102 to 0.185 and genetic and phenotypic correlations between weaning weight and birth weight, six months and one year weight were 0.579, 0.833, 0.733; 0.346, 0.693 and 0.558, respectively. The result can be used as an index for comparison of Baluchi performance traits with other domestic or foreign sheep breeds.

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