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Anim Biosci > Accepted Articles
https://doi.org/10.5713/ab.21.0182    [Accepted] Published online January 5, 2022.
Association between age at first calving, first lactation traits and lifetime productivity in Murrah buffaloes
Pooja Tamboli1,*  , Anurag Bharadwaj2, Amit Kumar Chaurasiya3  , Yogesh Chandrakant Bangar4  , A Jerome2 
1PAR division, ICAR-IGFRI, Jhansi. 284003, U.P., India
2ICAR-CIRB, Hisar 125001, Haryana, India
3Animal Nutrition, NDVSU Jabalpur 482001 (M.P.) India
4LUVAS, Hisar-125004, Haryana, India
Correspondence:  Pooja Tamboli, Tel: +91-7206579853, Fax: +91-7206579853, Email: tamboli.pooja307@gmail.com
Received: 17 April 2021   • Revised: 2 September 2021   • Accepted: 22 December 2021
Abstract
Objective
This study was conducted to estimate the association of age at first calving with first lactation traits as well as lifetime performance traits in Murrah buffaloes.
Methods
Data on first lactation and life time performance of Murrah buffaloes (n=679), maintained at ICAR-CIRB, Hisar, India during the period 1983 to 2017, were deduced to calculate heritability estimates, genetic and phenotypic correlation of different first lactation and lifetime traits. The univariate animal model was fitted to estimate variance components and heritability separately for each trait, while bivariate animal models were set to estimate genetic and phenotypic correlations between traits under study.
Results
The heritability was high for First Peak Milk Yield (FPY, 0.64±0.08), moderate for Age at First Calving (AFC, 0.48±0.07) and breeding efficiency (BE 0.39±0.09). High genetic correlations of FLTMY (First Lactation Total Milk Yield) with FLSMY (First Lactation Standard (305 days or less) Milk Yield), FPY (First Peak Milk Yield) and FLL (First Lactation Length) was seen. Likewise, genetic correlation of AFC was positive with FLTMY, FLL, FDP (First Dry Period), FSP (First Service Period), FCI (First Calving Interval), HL (Herd Life) and PD (Productive Days). Significant phenotypic correlation of FLTMY was observed with HL (Herd Life), PL (Productive Life), PD, Total LTMY (Total Lifetime Milk Yield), Standard LTMY (Standard Lifetime Milk Yield). Moreover, positive genetic and phenotypic correlation of FPY was observed with HL, PL, PD, Total LTMY and Standard LTMY.

Conclusion

This study reports that age at first calving had positive genetic correlation with FDP, FSP, FCI and UD (Unproductive Days) while, negative association of AFC was observed with FLSMY, PL, Total LTMY, Standard LTMY and BE. This suggests that reduction of age at first calving would results in improvement of lifetime performance traits.
Keywords: Association; Buffalo; Genetic; Heritability; Murrah; Phenotypic


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