31-Title: Effects of genetic factors on milk production efficiency of cattle of Shahabad region of Bihar
Authors: Sangeeta Kumari, Ramesh Kumar Nirala, PC Chandran and Pramod Kumar
Source: Ruminant Science (2023)-12(2):343-346.

Abstract

How to cite this manuscript: Kumari Sangeeta, Nirala Ramesh Kumar, Chandran PC and Kumar Pramod (2023). Effects of genetic factors on milk production efficiency of cattle of Shahabad region of Bihar. Ruminant Science 12(2):343-346.
Abstract
The present study was conducted on 109 randomly selected dairy units comprising 251 Indigenous (Desi), 90 Holstein Friesian crossbred (HFX), and 107 Jersey crossbred (JX) cows of the Shahabad region (Bihar). The average lactation milk yield of the HFX and JX was more than double that of the desi cows. Lactation length (days) of Desi, HFX, and JX cows were obtained as 317.82±1.50, 345.36±1.29 and 338.64 ±1.62, respectively. HFX showed a significantly higher peak yield (6.3 kg) than the Desi cow. Although JX showed non-significantly higher peak yield (4.82 kg) than Desi cow. Least squares means of DAPY in Desi, HFX and JX cows were found to be 57.06±0.58, 48.20±0.50 and 51.75±0.63 days, respectively. Genetic factors and lactation order had a significant (P<0.01) role on Days attained Peak yield (DAPY). HFX had significantly lower DAPY than JX and Desi Cow. The least squares mean of calving interval (CI, days) were obtained in Desi, HFX and JX as 456.97±1.27, 420.07±1.09 and 425.89±1.38 days respectively. HF crossbreds and JX cows had significantly (P<0.01) 36.90 days and 31.08 days lower average CI than Desi cows. HF crossbreds and JX cows had significantly (P<0.05) 44.21 and 50.50 days shorter dry periods than Desi, cows. JX cows obtained a significantly shorter dry period (11.29 days) than HFX cows. References Akhter J, Singh H, Kumar D and Sharma K (2003). Factors affecting economic traits in crossbred cattle. Indian Journal of Animal Science 73(4):464-465. Dutt T and Bhushan B (2001). Peak yield and its association with production and reproduction traits in crossbreds. Indian Journal of Animal Science 71(9):872-873. Katkade BS, Vaidya MS, Lokhande DU, Ingole SD, Ramteke BN, Bhoite UV, Patil CS and Sawane MP (2021). Effect of non-genetic and genetic factors on lifetime milk yield and herd life in Gir crossbred cattle. Ruminant Science 10(1):19-24. Kumar N (2004a). Genetic analysis of milk production efficiency in cattle and buffalo in and around Darbhanga, Bihar. MVSc Thesis, RAU, Pusa (Bihar). Kurnar D (2004b). Influence of genetic and non-genetic factors on some economic traits in Hariana and its crosses. MVSc Thesis, RAU, Pusa (Bihar) Kumar R (2005). Studies on genetic and non-genetic factors affecting milk production efficiency of cattle in and around Patna (Bihar). MVSc Thesis, RAU, Pusa (Bihar). Kumar S (2006). Studies on genetic and non-genetic factors affecting milk production efficiency of cattle in and around Samastipur (Bihar). MVSc Thesis, RAU, Pusa (Bihar). Kumar N, Abadi Y, Gebrekidan B and Tegene T (2014). Production performance of Dairy cows under farmers’ management in and around Mekelle, Ethiopia. Global Veterinaria 12(2):207-212 Prabhakar P (2007). Genetic and non-genetic factors influencing milk production efficiency of cattle in and around Madhepura (Bihar). MVSc Thesis, RAU, Pusa (Bihar). Priya Raj (2002). Studies on milk production and its economics. In crossbred cows under farmers’ managemental conditions of Patna (Bihar). MVSc Thesis, RAU, Pusa (Bihar). Savarkar SW, Borkar MM, Upadhyae SV and Jadhao SB (2001). Characteristics of dairy owners, their awareness, adoption and constraints in adoption of AI practices in Vidarva region. Indian Journal of Dairy Science 54(4):194-202. Singh K, Khanna AS and Kanaujia AS (2000). Factors affecting lactation performance and persistency in crossbred cattle. Indian Journal of Dairy Science 53(5):354-360. Singh S, Das AK, Kumar D and Kumar N (2013). Effect of genetic and non-genetic factors on production traits of Frieswal (HF x Sahiwal) crossbred cows. Indian Journal of Veterinary 22(1):63-66 Snedecor GW and Cochran WG (1987). Statistical Methods. Oxford and IBH Publishing Co. 66, Janpath, New Delhi. Wondifraw Zewdu, Thombre BM and Bainwad DV (2013). Effect of non-genetic factors on milk production ofHolstein Friesian × Deoni crossbred cows. International Journal of Livestock Production 4(7):106-112.