Lifetime performance of Phule Triveni synthetic cows at an organized farm

Abstract

The performance records of 509 Phule Triveni cows maintained at RCDP, MPKV, Rahuri (Maharashtra) during 1976 to 2012 were used to estimate heritability and genetic and phenotypic correlation of lifetime performance traits. The mixed model analysis using LSML used for estimation of variance components considering sire as a random effect, season and period of birth and age at first calving groups as fixed effects. Period of birth was significantly influencing almost all the lifetime performance traits, whereas season of birth did not influence any of the trait considered in the study. Age at first calving significantly influenced the LTMY3 and 4, HL and BE. The overall least squares means of 8712±271 kg, 12093±265 kg, 12767±207 kg for LTMY3, LTMY4, ALTMY and 2863±29 days, 1875±28 days and 77.00±0.71% were observed for HL, PL and BE, respectively. Heritability estimates for LTMY3, LTMY4 and ALTMY were medium (0.41±0.26, 0.36±0.32 and 0.15±0.11) for milk yield traits indicating that sire selection on the basis of their progeny performance along with improved management is likely to bring desirable improvement in the herd. Whereas the heritability estimates for HL, PL and BE (0.10±0.12, 0.10±0.12 and 0.01±0.11) were low and had high SE indicating that these traits were influenced by non-genetic causes and can be improved through better management. The genetic and phenotypic correlations of actual lifetime milk yield (ALTMY) with herdlife (HL) and productive life (PL) were very high close to 1 and were comparatively higher than the other lifetime performance traits under study.

Effect of non genetic factors on herd life and productive life of Gir crossbreds maintained at organized farm

“…The overall least square means of productive life in Gir crossbreds of IH, PT and R genetic group were 1660.26±89.76, 1352.71±68.58, 1378.72±106.68 days, respectively. However, Ambhore et al, (2017) [1] observed similar PL in PT cattle (1875±28 days), Rathee (2015) [12] noted higher (2008.81±107.82 days) PL in Frieswal cattle. Deshmukh (2008) [7] reported PL as 1641.42±99.58 days in PT cattle which is in close agreement with present result in IH genetic group.…”

“…The overall least squares means of herd life of Gir crossbreds in IH, PT and R genetic group was 3340.11±114.06, 2909.67±98.16 ,3808.31±180.17days respectively. However, Gahlot et al, (2001) [9] , Chaudhary et al, (2019) [5] notes similar herd life in Tharparkar cattle. However, in R genetic group Ambhore et al, [1] observed similar herd life (2885.20±55.46) in PT cattle.…”

“…However, Gahlot et al, (2001) [9] , Chaudhary et al, (2019) [5] notes similar herd life in Tharparkar cattle. However, in R genetic group Ambhore et al, [1] observed similar herd life (2885.20±55.46) in PT cattle. Rathee (2015) [12] observed herd life in Frieswal cattle as 2928.89±145.43 days.…”

“…The highest (4007.14±356.13 days) herd life was noticed in IH genetic group in period P1 (1990-1993) (1994)(1995)(1996)(1997) and the lowest (2363.67±821.46) herd life between period p8 (2018-2020). Dash (2014) [6] and Ambhore et al, (2017) [1] , Raheja (1994) [11] , Chaudhary and Shafiq (1995) [4] indicated significant effect of Period of calving on herd life in HF crosses.…”

“…In R genetic group the highest (2311.37±305.28) PL was viewed for cows calved between the duration of the period of P2 (1994)(1995)(1996)(1997) and the least (180.98±486.40) PL between period P8 (2018-2020), respectively. Ambhore et al (2017) [1] , Atrey et al, (2005) [3] Dubey and singh (2005) [8] rumored significant effect of period of calving on PL in Frieswal and PT cattle. However, Dash (2014) [6] , Singh et al, (2002) [13] notified non significant effect of Period of calving in HF×S and KF cattle, respectively.…”