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The reproduction characteristics of 343 sows in six different breeding groups were analyzed to estimate the crossbreeding parameters. The results indicated that the ovulation rate and the weights of uterus and ovary are mainly determined by the additive genetic effects while the nonadditive genetic effects play an important role in embryonal traits and litter performance. The heterosis effects in the first litter are larger than those in the second litter because of heterosis x environment interaction. The results also showed the existence of a highly significant maternal heterosis effect on the fertility traits of sows. 相似文献
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Leptin蛋白的研究进展 总被引:1,自引:0,他引:1
Leptin蛋白是肥胖基因(ob)的翻译产物,它直接控制着脂肪的沉积,对这的深入了解,有望解决人类的肥胖问题,综述了ob基因和Leptin蛋白的结构、功能、定位,调节体重的机理及应用。 相似文献
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INTRODUCTIONDNAfingerprintingisamethodforproducingtheDNAfragmentbandpattern ,specificforthegenomeofacertainindividual.Theproductionoftheindividualspecificbandpatternisbasedonthesimultaneousdetectionofseveralhighlypolymorphic,repetitivegenomicregions,wh… 相似文献
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