Chromosome of Two Species of Short-winged Grasshoppers in Family of Catantopidae

The chromosome karyotypes of two different grasshopper species, i.e., Pseudoptygonotus kunmingensis and Lemba vibridutibia, belonging to Catantopidae, were reported.It was showed that the karyotypes of these two species were both telocentric chromosomes with 2n(♂)=23. The sexes of these two grasshopper species were all determined by XO type, and the sex-chromosome belonged to large chromosome, which took the first place in all chromosomes according to its relative length.It was showed by the study that the Pseudoptygonotus kunmingensis had 28 C-bands, including 5 terminal C-bands lying on loci L₂ , M₅, M₇, M₈ and S₁₁.The cross frequencies of chromesomes of these two short-winged grasshopper species mainly appeared on locus 1 and locus 2 during the meiosome process.