免疫大师公牛女儿的疾病抗性分析

Analysis on Disease Resistance of Immunity^+Bulls’Daughters

为探究通过抗病选育的免疫大师公牛女儿的疾病抗性情况,试验收集上海地区3个同时使用免疫大师公牛和普通公牛冻精牧场的5112条个体疾病记录,采用Logistic回归法分析了犊牛出生季节、成母牛年龄、父亲类型(免疫大师和普通公牛)对部分常见奶牛疾病发病风险的影响。结果表明,出生季节和年龄分别对犊牛和成母牛各类疾病的发病风险有显著影响(P<0.05);父亲类型对乳房炎的发病风险在部分群体中有显著影响(P<0.05)。与普通公牛的女儿相比,免疫大师公牛女儿乳房炎发病风险更低。综合本研究结果,免疫大师公牛的抗病能力选育技术有效,其在中国奶牛群体的后代表现出更好的疾病抗性,尤其是提高了奶牛乳房炎抗性,为利用育种手段提高奶牛群体的抗病能力和养殖效益提供了可行的技术路线。

The objective of current study was to explore daughters’disease resistance of Immunity+bulls selected for disease resistance.A total of 5112 individual disease records were collected from 3 dairy farms that using both frozen semen from Immunity+bulls and ordinary bulls.A Logistic regression was used to analyze the impacts of birth season of calves,age of cows and sire type(Immunity+bull or ordinary bull)on the risk of some common diseases in dairy cattle.The results showed that birth season and age had significant impacts on the risk of various diseases in calves and cows(P<0.05),respectively.The sire type had a significant impact on the risk of mastitis in some populations(P<0.05).Compared with the daughters of ordinary bulls,the daughters of Immunity+bulls had a lower risk of mastitis.In conclusion,the breeding technology of selecting for disease resistance in Immunity+bulls was effective,and their progeny had better disease resistant ability,especially on resistance to mastitis,which provided a feasible technical route to improve the disease resistance and profitability of dairy population by selective breeding.