The advantage of traditional haploid is that

Excellence: a good trait that can be inherited.

Insufficient: the frequency of mutation producing beneficial mutants is low; It is difficult to effectively control the direction and nature of change.

Hybrid breeding:

Excellent: Two or more excellent qualities can be grouped together.

Disadvantages: no new genes will be produced, and the hybrid offspring will have character separation, and the breeding process is slow and complicated.

Haploid breeding:

Excellent: it can increase the mutation frequency, speed up the breeding process, and improve some characters greatly; A wide range of changes

Lack: there are few favorable variations, and a lot of materials must be processed; The direction and nature of the mutation are uncontrollable. The improvement effect of quantitative traits is poor.

Polyploid breeding:

Excellent: The content of fruit seeds with stout stems and leaves is higher than that of protein.

Lack: generally late ripening, affecting fertility.

Genetic engineering breeding

Excellent: overcoming the incompatibility barrier of distant hybridization and directionally changing biological characters.

Lack: It may cause ecological crisis and is technically difficult.

Application of cell engineering in breeding

Excellent: it is not limited by species and can be carried out purposefully according to human needs.

Lack: may cause ecological crisis, high technology and fine operation.