共查询到19条相似文献,搜索用时 78 毫秒
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自从1997年龙王公司引进台系杜洛克以来,商品猪在所有供港场家中质量一直位于前列,这与台系杜洛克的优秀品质密不可分,在省粮油公司和湖北各兄弟场家的共同推广下,使湖北商品猪供港质量亦得到提升。说明台系杜洛克作为供港商品猪终端父本的具有其优越性,其中供港卖价一直作为衡量终端父本杂交优势的具体表现,因为卖价不仅体现了瘦肉猪的表型要求,也结合了胴体品质。 相似文献
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终端父本杜洛克猪新品系选育效果研究 总被引:1,自引:0,他引:1
采用“闭锁与开放”相结合的育种方式组建基础群。依据性能测定结果,以日增重、瘦肉率作为主选性状。对美系杜洛克猪进行了5年的选育。结果日增重公猪达856g。母猪达833g。分别提高了6.87%和5.98%;瘦肉率公猪达66.2%。母猪达65.6%,分别提高2.32%和2.66%;背膘厚公猪下降了0.8mm。母猪下降了0.6mm。 相似文献
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杜洛克、长白、大白猪是我国分布最广泛的瘦肉型品种,在进行选育试验中,为了了解这些品种的生长和肉用性能及其杂交效果,进行了此项研究。 相似文献
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杜洛克、长白、大白猪是世界上公认的最主要的三个优秀瘦肉型猪品种(其中杜洛克多做终端父本),具有生长速度快,瘦肉率高,饲料报酬好,腿臀丰满,体形长而优美,肢蹄强壮结实等优点。为改良我国地方猪种、培养适应华中、华南广大地区的优良品系,应农业部要求,天发集团于2001年5月一 相似文献
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1992年元月,中国粮油食品进出口总公司从英国引进了一批大白猪(以下称新大白)。为了观察其杂交效果,我们于1993年春从湖北某猪场购进不同血统的两对原种第一代,并从湖北省农科院畜牧兽医研究所购进我国于70年代引进,后经系统选育的大白猪公猪2头(2个血统,以下称老大白),分别与本场的丹麦长白母猪杂交,对杂种猪进行肥育对比试验。 相似文献
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杜湖杂交猪生产性能的测定 总被引:1,自引:0,他引:1
以杜洛克为父本、湖北白猪二元配套系为母本所生产的杜湖猪、育肥期平均日增重为700g,料肉比3.0,屠宰率73.1%,瘦肉率65.6%。与原杜湖猪相比,综合生产性能有了很大提高。 相似文献
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The present study investigated the effect of outdoor rearing and genetic background on behaviour and meat quality traits in heavyweight pigs. Large White and Duroc-sired pigs were reared in groups of 3 castrated males and 3 females, conventionally or in fields, from April to October, in a study with two replicates. Compared to indoor pigs, outdoor pigs were more active and showed a larger range of behaviour suggesting improved welfare from a behavioural point of view. During 5 h of isolation, outdoor pigs were less active and had lower heart rates, and in another test, they reacted less to a non-familiar object (traffic cone). Pigs were slaughtered at 150 kg live weight, half of each treatment group after mixing, short transport, and overnight lairage and half immediately following short transport. Outdoor pigs were less aggressive during pre-slaughter mixing. Ante- and post-mortem glycogen content of the Longissimus lumborum (LL), Semimembranonus (SM) and Semispinalis capitis (SC) muscles depended on slaughter conditions, sire breed, rearing conditions, gender and year of experimentation, sometimes influencing ultimate pH. Effects of rearing on muscle glycogen content and post-mortem pH were stronger during the second year of rearing. Effect of slaughter conditions on glycogen content and ultimate pH depended on fighting levels during pre-slaughter mixing. Outdoor rearing increased muscle redness. Drip and cooking loss were higher in Large White than Duroc-sired pigs. Drip and cooking loss were correlated with early post-mortem and ultimate pH. Thawing loss was correlated with early post-mortem temperature and ultimate pH. Finally, reactivity to isolation had a predictive value as pigs more active during isolation had less skin damage due to fighting during pre-slaughter mixing. In conclusion, despite large effects of year of experimentation, outdoor rearing, sire breed, and slaughter conditions influenced behaviour and muscle characteristics. 相似文献
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为了探索用白色獭兔快速生产优质海狸色獭兔皮的繁育模式,开展了海狸色獭兔与白色獭兔杂交试验。配种组合为海狸色公兔×海狸色母兔(试验1组),白色公兔×白色母兔(试验2组)和海狸色公兔×白色母兔(试验3组)。3组后代进行生长发育和皮毛质量测定。结果表明:杂种的生长速度最高,料肉比最低;杂种海狸色较纯种海狸色獭兔的被毛密度、毛丛长度均高,枪毛比例在海狸色与白色獭兔之间;用海狸色公兔与白色母兔进行杂交是快速生产海狸色獭兔皮张的较佳繁育模式。 相似文献
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采用红色肉牛改良早胜牛效果观察 总被引:2,自引:1,他引:1
引用国外著名的红色肉牛品种南德温、利木赞、德国黄牛和安格斯细管冻精杂交改良早胜牛。结果表明,均显示其父本的特征,被毛大多数为红色、紫红色和黄红色。初生至6月龄体重和相关的体斜长、胸围均优于早胜牛,也表现出了其杂交优势,其中南×早和利×早与德×早、安×早杂交群体相比,在生长发育过程中表现出更好的发育趋势,即南×早>利×早>德×早>安×早,且发现采用肉用型牛改良早胜牛,大型肉牛优于中型肉牛,中型肉牛优于小型肉牛的趋势。 相似文献
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