首页> 外文期刊>Indian Journal of Animal Production and Management >COMPARATIVE PERFORMANCE OF F_1, AND F_2 CROSSBRED COWS WITH RESPECT TO REPRODUCTIVE TRAITS
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COMPARATIVE PERFORMANCE OF F_1, AND F_2 CROSSBRED COWS WITH RESPECT TO REPRODUCTIVE TRAITS

机译:F_1和F_2杂种牛与生殖性状的比较性能

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摘要

Records of 49 Holstein Friesian x Hariana F_1 and F_2 haifbred and 21 Jersey x Sahiwal F_1 and F_2 halfbred for reproduction traits maintained at Cattle Breeding Farm, Borgaon Manju pertaining to year 1974-1995 constituted the material for this study.The effect of hybrid was significant for age at first calving and service period, while non-significant for intercalving period. The F, halfbred had significantly lower age at first calving (1356.98 +- 48.78 days) and service period (106.31 +- 10.40 days) than F_2 halfbred i.e. 2000.12 + 97.80 days and 221.25 + 19.06 days, respectively. The results suggested that the F_1 crosses had comparatively better performance than F_2 crosses.
机译:1974-1995年在Borgaon Manju牛饲养场维持的49 Holstein Friesian x Hariana F_1和F_2杂种和21 Jersey x Sahiwal F_1和F_2半种的繁殖性状记录构成了这项研究的材料。在第一次产犊和服务期间的年龄,而在产犊期间则不重要。第一次产犊(1356.98 +-48.78天)和服务期(106.31 +-10.40天)的F杂种的年龄比F_2杂种低,即分别为2000.12 + 97.80天和221.25 + 19.06天。结果表明,F_1杂交比F_2杂交具有更好的性能。

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