Genetic improvement through complete restricted selection indices in Surti buffalo

First lactation records of 507 Surti buffaloes, sired by 41 bulls, maintained at Buffalo Project, Livestock Research Station, Vallabhnagar (Rajasthan) were utilized to develop multi-trait selection indices. Ten complete restricted selection indices (RI1 to RI10) were developed by imposing single or 2 trait restrictions on AFC, FSP, FLL and FCI. The index coefficients (b(i)), expected genetic gain in each trait (G(i)), correlation between index and breeding value (R-1H) acid aggregate genetic gain (Delta H) were compared and it was observed that the complete restriction on FCI would be the most appropriate for genetic improvement. This would produce a desirable genetic change in FLMY (5.5686 kg), AFC (-31.0264 days), FDP (-0.0651 days), FPY (0.0325 kg) and FSP (-0.2024 days).