Advantages and disadvantages of biological breeding methods and principles in senior high schools

Type hybridization breeding artificial mutation breeding haploid breeding polyploid breeding

Principle: Gene recombination, gene mutation, genome doubling, genome doubling.

Colchicine with different qualities can be treated and germinated by physical or chemical anther culture in a conventional way.

Treatment of biological seeds or seedlings by parental hybridization of traits

The advantages make the mutation frequency of excellent improvement in different individuals obviously shorten the breeding period, increase the organs and enrich the nutrition.

The concentration of traits in one individual accelerates the breeding process, increases the composition and improves the yield.

Disadvantages: long breeding time, favorable variation, small demand, large and complex technology, and only suitable for plants.

The processing capacity is used for cross breeding of experimental materials.

For example, cultivating triploid seedless watermelon, eight

Ploidy triticale is a hybrid of wheat susceptible to rust.

Produce short rust-resistant varieties