17-Title: Genetic studies on some production traits in Sahiwal cows
Authors: PK Singh, Sumit Kumar, R Goel and SP Singh
Source: Ruminant Science (2013)-2(2):201-203.
How to cite this manuscript: Singh PK, Kumar Sumit, Goel R and Singh SP (2013). Genetic studies on some production traits in Sahiwal cows. Ruminant Science 2(2):201-203.
Genetic study of production traits in Sahiwal cattle was carried out viz. first lactation 300 days milk yield (MY-300), 90 days milk yield (MY-90), 120 days milk yield (MY-120), 150 days milk yield (MY-150), 180 days milk yield (MY-180), first lactation peak yield (FPY), and days to reach peak yield (DTRP). The heritability estimates for 90, 120, 150, 180 days part milk yield, peak yield, days to reach peak yield and 300 days milk yield were 0.129±0.042, 0.145±0.045, 0.237±0.063, 0.303±0.075, 0.384±0.089, 0.365±0.086 and 0.322±0.078, respectively. The genetic correlations of 90, 120, 150, 180 days milk yield and peak yield with 300 days first lactation milk yield were 0.636±0.121, 0.807±0.067, 0.754±0.077, 0.611±0.108 and 0.722±0.080, respectively and of days to reach peak yield was high, negative and significant (-0.722±0.153).
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