What are the limitations of the backcross breeding method?
What are the limitations of the backcross breeding method?
发布时间：2025-08-15 18:42:56
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答案：【计分规则】: 1 ) It is limited to improving a single trait. Most traits are not improved, so no major breakthrough can be achieved.2 ) The traits to be transferred are controlled by a few genes, and the traits that are quantitatively inherited are not easy to introduce.3 ) A large amount of cross-breeding work needs to be done for each return, which is heavy and time-consuming.4 ) When the target trait and the unfavorable trait are closely linked, it is necessary to backcross multiple times to break the link; if one cause is multi-effect, it cannot be separated.5 ) The genotype of the recurrent parent recurs back to the recurrent group and often has deviations.
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