The comparing of growth potency of the crossbred and Ghezel lambs of Khalat-Pooshan Station by univariate and repeated measures analysis in period

For the comparing the growth potency of crossbred and Ghezel lambs by analysis the univariate and repeated measures traits in period 40 male lambs of the same age were used. Genetic groups were included the 7 heads of pure Ghezel lambs and the 7 heads Baluchi×Ghezel crossbred lambs، 7 heads Arkharmerinoos×Ghezel and the 10 heads Arkharmerinoos×Moghani and the 9 heads Baluchi×Moghani lambs. The lambs in 90 days of age were fattened for 110 days in 5 groups. Birth weight، final weight، mean of average daily gain and mean of total average gain in 14 to 70 days of period were studied traits in this investigate. Total traits once analyzed by GLM procedure and mean of daily weight gain and mean of total weight gain in 14 to 70 days of period were analyzed by mixed procedure of SAS 9. 1 software again. In second method CS structure were used as the variance and covariance structure. Within traits the effect of genetic combination was significant on the daily weight gain and total weight gain in 14، 28 and 42 days of fattening period (P<0. 05). At the univariate analyze of traits Ghezel breed lambs have a high performance in 14 and 28 days of period، and Arkharmerinoos×Ghezel in 42 days and Baluchi×Moghani crossbred lambs in 56 days too. At the repeated measures analysis of traits Arkharmerinoos×Moghani crossbred lambs have a low performance، in 28 days Ghezel breed lambs have highly performance and in 42 days Ghezel breed lambs have lowly performance. With regard to obtained results and calculated standard errors for the comparing of least square means at the analysis of tow used methods، obtained results of repeated measurement traits were more accurate than univariate analysis of traits and using this method is recommended at the same researches.