1. These biotechnologies include polyploidy, gynogenesis and androgenesis, the development of monosex populations and cryopreservation.

2. The combination of gynogenesis and sex reversal has great significance in fish genetic breeding.

3. The studies made know that Gynogenesis was a effective method to promote gene purification. microsatellite marker technique is an effective method of gynogenesis verification and genetic analysis.

4. The haploid breeding of maize is a technology that using anther culture or gynogenesis to produce haploid, and then obtain stable new varieties through natural or artificial doubling.

5. Based on these two indicators, the effectiveness on the gene homogenization by one generation of gynogenesis was 3 and 6 times higher than that from one generation of full-sib inbreeding respectively.

6. By means of the culture in vitro of unfertilized ovary of strawberry (Fragaria L), the gynogenesis was induced and the gynogenic plants with half number chromosomes were obtained.