Berry D P, Conroy S, Pabiou T, Cromie A R
Teagasc, Animal & Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland.
Irish Cattle Breeding Federation, Highfield House, Bandon, Co. Cork, Ireland.
Meat Sci. 2017 Oct;132:6-18. doi: 10.1016/j.meatsci.2017.04.019. Epub 2017 Apr 21.
The contribution of animal breeding to changes in animal performance is well documented across a range of species. Once genetic variation in a trait exists, then breeding to improve the characteristics of that trait is possible, if so desired. Considerable genetic variation exists in a range of meat quality attributes across a range of species. The genetic variation that exists for meat quality is as large as observed for most performance traits; thus, within a well-structured breeding program, rapid genetic gain for meat quality could be possible. The rate of genetic gain can be augmented through the integration of DNA-based technologies into the breeding program; such DNA-based technologies should, however, be based on thousands of DNA markers dispersed across the entire genome. Genetic and genomic technologies can also have beneficial impact outside the farm gate as a tool to segregate carcasses or meat cuts based on expected meat quality features.
动物育种对动物生产性能变化的贡献在一系列物种中都有充分记录。一旦某一性状存在遗传变异,那么如果有此需求,就有可能通过育种来改善该性状的特征。在一系列物种的多种肉质属性方面存在相当大的遗传变异。肉质方面存在的遗传变异与大多数生产性能性状所观察到的变异一样大;因此,在一个结构完善的育种计划中,有可能实现肉质的快速遗传进展。通过将基于DNA的技术整合到育种计划中,可以提高遗传进展的速度;然而,此类基于DNA的技术应基于分散在整个基因组中的数千个DNA标记。遗传和基因组技术作为一种根据预期肉质特征对胴体或肉块进行分类的工具,在农场大门之外也能产生有益影响。