A cladistics study on karyotype characters of some species of Genus Oxya Serv. (Orthoptera:Acridoidea);

Objective To investigate the correlation among genesis,clinical phenotype and chromosome banding by analyzing one case of ring chromosome 21 syndrome.

Cloning and sequencing of two molecular markers located on the sex chromosomes of the cotton bollworm, Helicoverpa armigera;

Studies of Karyotypes and Sex Chromosomes in Pseudotaxus chienii;

Sex chromosome abnormalities and analysis of the relationship between male infertility

Results Abnormal chromosome karyotype(ACK) was detected in 23 patients, sex chromosomes were involved in all these cases, the most were 47,XXY, 17 cases, which accounted for 29.

From the cytogenetic perspective, only a small proportion of fish species have heteromorphic sex chromosomes.

Molecular evolution processes of sex chromosomes and sex determination provide a clue to tendency of sex-determining genes to appear on heterotypic sex chromosome.

Construction of two DH populations and identification of chromosome ploidy in burley tobacco;

Diversity of Dioscorea zingiberensis from morphological characters to DNAs was discussed in this paper:(1) morphological and structure diversity;(2) growth status;(3) biochemical and physiological properties;(4) chromosome ploidy variation;(5) isozyme genetic variation and genetic diversity DNAs.

Nine lines of Trichosanthes Kiriloii Moxim from five areas in Henan Province were to study the relationships among the main components in seeds, some physiological characteristics, chromosome ploidy, and the substance accumulation during development.