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Indian Journal of Animal Research

STUDIES ON FACTORS AFFECTING CALVING INTERVAL IN TWO AND THREE BREED GIR CROSSES

Article Id: ARCC3300 | Page : 69· 72
Citation :- STUDIES ON FACTORS AFFECTING CALVING INTERVAL IN TWO AND THREE BREED GIR CROSSES.Indian Journal of Animal Research.2005.(39):69· 72
O.K. Oeokar, S.T. Pachpute, V.S. Lawar and B.D. Naikare
Address : Department of Animal Science and Dairy Science. Mahatma Phule Krishi Vidyapeeth. Rahuri . 413 722. India

Abstract

A data on 2040 records of halfbreds (FG and JG) and three breed (FJG, JFG and BFG) Gir
crosses were collected and analysed by least-squares method. The genetic group, period and seasonof calving, parity, age and weight at first calving were considered as sources of variation. The overall least-squares means for calving interval of first five lactations and their pooled were
419.60±4.38, 401.89±7.02, 401.32±5.82, 400.62±8.16, 387.33±12.58 and 403.45±3.45
days, respectively. The calving interval of first five lactations were non-significantly affected by all
the sources of variation except genetic group effect (P<0.05) on first calving interval. The genetic
group, lactation order (P0.05) and period of calvng (PO.Ol) had.significant effecton the pooled
calving interval.

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