1. After 15 years' efforts, the research team led by Professor Liu Cheng Ming of South China Agricultural University finally cultivated a new hybrid variety named? Crispy honey? A new kind. This is the first new variety of longan and litchi. Simply put, it is a new species, a hybrid of different races.

Crispy honey? It has the characteristics of late maturity, large fruit, high quality, strong growth potential, strong cold resistance and wide adaptability, and has great market development potential.

Second, plant hybridization needs to meet the selection and purification of hybrid parents. The selection and purification of hybrid parents are the basic conditions for utilizing heterosis. In order to obtain obvious heterosis, hybrid offspring must be able to obtain excellent high-yield heterosis and epistatic effect.

Some people have a one-sided understanding of the advantages of hybridization, thinking that as long as it is hybridization, there must be advantages. In fact, the advantages of hybridization depend largely on the parents of hybridization and their cooperation. If the hybrid parents do not have excellent genes, or the genetic differences between parents are small, or the purity of parents is low, they cannot show ideal hybrid advantages. ?

Third, select individuals that meet the purpose of breeding. By crossing their parents, they can get the recombination of traits, thus having two excellent genetic traits, even one excellent trait of super-parents. Of course, there may also be a combination of parents' inferior traits, or parents' inferior traits.

The purpose of breeding is to select individuals who meet the breeding purpose from many crosses until a new variety with good stability is obtained.

In the case of individual selection method, selection usually starts from the second generation, and the second generation has the largest variation range, so it is hoped that satisfactory variants can be selected from it. By the third generation, it can basically be determined whether new varieties can be cultivated. By the fifth generation, most characters and families were relatively stable.