[Genetic diversity of Pardosa pseudoannulata populations and its relationships with habitats].

A random amplified polymorphic DNA (RAPD) analysis was made on the Pardosa pseudoannulata populations collected from eight habitats in Central-south China, Southwest China, and Hainan Island. 10 from 50 primers were selected, and 84 bands of 200-2500 bp fragments were amplified, among which, 62 bands (73.8%) were polymorphic, suggesting an obvious polymorphism of the populations.

Powers of multiple-testing procedures for identification of genes significantly differentially expressed in microarray experiments.

Because of the high operation costs involved in microarray experiments, the determination of the number of replicates required to detect a gene significantly differentially expressed in a given multiple-testing procedure is of considerable significance. Calculation of power/replicate numbers required in multiple-testing procedures provides design guidance for microarray experiments. Based on this model and by choice of a multiple-testing procedure, expression noises based on permutation resampling can be considerably minimized.

[Progress on the researches of karyotypes of Chinese spiders].

Six methods for making preparation of chromosomes of spiders, including gonad slice technique, testis squash technique, single embryo drop technique, mix embryo-cells drop technique, blood cell drop technique and single embryo-cell squash technique, are summarized in this paper. The karyotypes of 27 species from 22 genus in15 families are analysed.