Author(s): AT Lokhande, ST Pachpute, SB Adangale, DK Deokar, SH Mane and DK Kamble

Abstract: The data on reproduction traits of FJG triple cross maintained at R.C.D.P. on cattle, M.P.K.V., Rahuri (Maharashtra) were collected from year 1972 to 2014. The overall least squares means of AFC for FG and FJG genetic group were 974.48 ± 8.31 and 1005.17 ± 7.01 days respectively. In FJG the DMRT indicated that the heifers born during P₁ (907.26 ± 5.47) and P₂ (927.14 ± 7.45) while the heifers born during P₄ (1126.16 ± 13.67) and P₅ (1123.58 ± 24.96) shows highest AFC days which are at par with each other. Although the effect of season of birth on AFC was non-significant the lowest AFC was observed in heifers born during summer season (994.74± 8.74) in FJG. The variation due to season of birth in age at first calving was significant in FJG genetic group of heifers. The heifers born during rainy season (962.43 ± 10.57) shows lowest age at first calving while rest of seasons. The overall least squares mean of OP in FJG genetic group was 72.02 ± 1.76 days as affected by genetic groups. The non-significant effect of period of calving, season of calving, lactation order and AFC group on OP observed. The overall least squares means of Service period in FJG genetic group cows was 141.75 ± 1.70 days. The variation due to SOC, LO and AFC group on SP was non-significant. The effect of generation was significant on SP. In FJG group the lowest SP observed in G₁ (116.85 ± 3.67) while highest in G₃ (177.75 ± 4.05). The overall least squares means of calving interval as affected by genetic group was 398.48 ± 2.05 days. The Generation wise least squares means for significantly higher calving interval in FJG group observed in G₅ (421.32 ± 8.29) days.

DOI: 10.33545/26174693.2024.v8.i6Sa.1246