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标题：Genetic analyses of first lactation traits of Boran and their crosses with Holstein and Jersey in central highlands of Ethiopia
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作者：Berhanu Belay ; A. K. Chakravarty
期刊名称：Journal of Cell and Animal Biology
电子版ISSN：1996-0867
出版年度：2013
卷号：7
期号：1
页码：9-15
DOI：10.5897/JCAB12.059
语种：English
出版社：Academic Journals
摘要：Data obtained from Holeta Agricultural Research Center in Ethiopia were analyzed to compare the Boran cattle and the crossbreds and estimate genetic and crossbreeding parameters for first lactation traits. First lactation traits studied were first lactation total milk yield (FLMY), first lactation length (FLL), milk yield per day to first lactation (FLDMY), first 305 days milk yield (MY305) and adjusted first lactation 305 days milk yield (AFL305DMY). The effect of genetic group was significant (p0.05) difference between HF x Bo and HF x HFBo or J x Bo and J x JBo and thus exotic inheritance beyond 50% showed no improvement in first lactation traits. The heritability estimates were medium (0.21+03) for FLL to high (0.39+0.40) for FLDMY. The breed additive difference for HF or Jersey was positive and significant (p0.05) for Jersey x Boran crosses except FLDMY and AFL305DMY. Crossbreeding improved first lactation traits three to four folds. Thus, crossbreeding with management interventions could be recommended to improve milk production.
关键词：Crossbreeding;genetic parameters;milk yield;non-genetic factors