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Indian Journal of Animal Research
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volume 39 issue 1 (january to june 2005) : 69· 72
STUDIES ON FACTORS AFFECTING CALVING INTERVAL IN TWO AND THREE BREED GIR CROSSES
1Department 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
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
KEYWORDS
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Published In
Indian Journal of Animal Research