[Progress on gene targeting].

Gene targeting is a rising technology in molecular biology,which is defined as the introduction of exogeneous DNA to specific site in genome by homologous recombination,and consequently change the hereditary character of the cell. This technology provides a new and powerful means for research in developmental biology,molecular genetics,immunology and medicine. Progresses have been made in exploring gene structure and function,gene expression and regulation,transgene and gene therapy with the application of gene targeting.

[Current status and future perspective of genetic linkage mapping in aquaculture species].

Constructing genetic linkage map is an essential tool to acknowledge genome in aquaculture species. This paper has reviewed the current status of genetic linkage map research, including mapping population, mapping method and molecular markers used to construct linkage map. Linkage map has great potential in marker assisted selection (MAS), gene locating and cloning, and comparative genome mapping.

A rice transcription factor OsbHLH1 is involved in cold stress response.

Cold stress adversely affects plant growth and crop production. Some plants express a series of cold-responsive genes during cold acclimation to reduce the damage of cold stress. Among them, transcription factors play important roles in enhancing plant cold tolerance.