Prediction of breeding values for osseous fragments in fetlock and hock joints, deforming arthropathy in hock joints, and pathologic changes in the navicular bones of Hanoverian Warmblood horses

The results of a standardised radiological examination of 5928 Hanoverian Warmblood horses selected for sale at auction were used to predict relative breeding values (RBV) in the 23,662 horses included in the last four generations of the probands' pedigrees. The distribution of the RBV was investigated in the whole four-generation pedigree, in the probands and in those stallions that contributed at least three offspring to the probands. The RBV of the probands' sires were further compared with the officially published performance-based relative breeding values, i.e., total indices dressage (TID) and jumping (TIJ). The sires' level of dressage indices was considerably higher (mean TID=110) than of the jumping indices (mean TIJ=98). Total indices radiographic findings (TIR) were calculated for the sires with varying weighting given to the individual RBV. In each case, this resulted in a mean TIR of 99. Finally, total indices were derived from TIR and TID and/or TIJ in order to develop different selection schemes for all-purpose breeding and for breeding focused on dressage and show jumping. All breeding values under consideration increased by between 1% and 19% when radiographic findings were weighted with between 30% and 60% complementary to the corresponding performance parameters, and when only sires were selected with above average total indices. At the same time, the prevalences of the radiographic findings investigated here were lowered by up to 10% each. When only one radiographic finding was considered at a time, the maximum attainable response to selection was a 16-23% increase in the relative breeding values and a relative decrease in prevalences of radiographic findings of between 31% and 52%. The results of this study indicate that it is possible in horse breeding to consider simultaneously health and performance traits. Medical data should be included in the prediction of breeding values in order to improve the radiological status of today's riding horses.     

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肉色是衡量肉品质的重要感官指标,直接影响消费者的购买意愿。植物多酚是天然的抗氧化剂,日粮添加植物多酚可通过影响肌红蛋白氧化还原状态、脂质氧化程度及肌纤维类型来改善肉色及其稳定性。为进一步明确日粮中添加植物多酚调控肉色的作用机制,本文对植物多酚介导肉色稳定性的信号途径进行了综述,以期为今后通过在日粮中补充植物多酚调控机体抗氧化能力、促进肌纤维类型转化进而改善肉色提供理论依据。     

湖南重点产竹县竹产业发展现状与发展趋势

在总结湖南省重点产竹县竹产业发展现状的基础上,对比分析重点县的竹产业发展现状,剖析当前该省竹产业发展方面存在的主要问题,并提出了发展趋势。     

我国桃树设施栽培的现状、存在问题及对策

总结了我国桃树设施栽培的现状,包括设施栽培的目的、主要形式、品种选择、环境要求、调控技术和主要栽培技术等,指出了生产上存在的问题并提出了相应的对策     

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华北东部低平原红枣产业的现状、问题及解决途径

华北东部低平原金丝小枣产区是我国最大的红枣产区,产区跨越山东、河北及天津3个省(市)的近30个县(市、区)。文章在简要叙述区域内红枣产业(含冬枣产业)发展现状的基础上,从宏观高度分析了当前红枣产业发展中存在的重大问题,并提出了解决这些问题的重要途径。     

果蔬盆景的发展及产业化初探

果蔬盆景作为新兴产业发展迅速,本文阐述了果蔬盆景的发展现状、特点,分析了果蔬盆景产业化发展的优势,并根据我省发展状况提出了建议。     

内蒙古生态农牧业生产经营存在问题及对策分析

内蒙古自治区是我国北方重要的生态安全屏障,持续加强生态农牧业转型升级,大力推进“三北”等重点生态工程建设是我区畜牧业面临的重要问题。本文主要阐述了内蒙古生态农牧业发展现状及存在问题,并提出了相关对策建议。