Performance appraisal and genetic parameter estimation of all lactation traits in Karan fries cattle

• DOI: 10.18805/ijar.v0iof.4565
• Publication Date: 2016-11-16T18:12:09Z
• Authors: Shakti Kant Dash; A.K. Gupta; Avtar Singh; A.K. Chakravarty; Manvendra Singh; Virendra Kumar
• Keywords: Genetic correlation; Parity (physics)

Present investigation comprehends the study of effect genetic and non-genetic factors estimation parameters Karan Fries cattle with respect to production reproduction traits across all lactations. Data consisted a total 5878 lactation records on 1988 cows over period 32 years (1981 2012), maintained at ICAR-NDRI, Karnal. Overall least-squares means for CFS(days), SP(days), LL(days), CI(days), 305MY(kg), TMY(kg), MY/LL(kg/days), MY/CI(kg/days) DPR were found be 78.21±1.59, 115.46±2.14, 326.57±2.60, 403.91±2.54, 3634.78 ± 30.91, 3976.77 41.03, 12.19 0.08, 10.28 0.08 0.37 0.80, respectively. Both fertility significantly affected by different viz. season calving, parity group. LSANOVA heritability estimates SP, CI, LL, CFS, DPR, 305MY, TMY, MY/LL, MY/CI 0.18±0.08, 0.15±0.07, 0.11±0.05, 0.10±0.09, 0.07±0.07, 0.39±0.09, 0.26±0.07, 0.35±0.08 0.42±0.10, Heritability indicated that less additive gene action. Genetic correlation unfavourable positive between traits.