论文部分内容阅读
目前畜禽的选种依据,主要是根据经济性状的表型值进行的。遗传学研究证明,如果某些经济性状的遗传力高,则按表型值选种或按育种值(基因型值)选种,其选种效果相仿。由于按表型值选种比较直接和简便,在这种情况下,自然表型值选种便于在生产实践中推广和应用。但是,如果某些经济性状的遗传力很低,则表型选择效果的可靠性不如按基因型值选种。同时畜禽的某些经济性状往往要到经济成熟时才表现出来,这样就势必要延长饲养时间,从而延晚育种进程。所以如何探索早期选种,提高选种的效力和准确性,降低饲养成本,加快育种进展,便是此项研究的目的。
Currently, the selection of livestock and poultry is based on the phenotypic values of economic traits. Genetic studies have shown that if some of the economic traits of high heritability, the phenotypic value selection or breeding value (genotype value) selection, the selection effect is similar. As the phenotypic value selection is more direct and simple, in this case, the natural phenotype value selection easy to promote and apply in production practice. However, if the economic power of some economic traits is low, the phenotypic effect is less reliable than the genotype. At the same time, some economic traits of livestock and poultry often appear only when the economy is mature, so it is necessary to extend the feeding time and delay the breeding process. Therefore, it is the purpose of this study to explore early seed selection, improve the effectiveness and accuracy of seed selection, reduce the cost of breeding and accelerate the breeding progress.