Chromosome and Meiotic Division of Migratory Bird Locust (Cyrtacanthacris tatarica Linnaeus, 1758) in Thailand

Abstract

This research is aimed to study the chromosomes of male migratory bird locust (Cyrtacanthacris tatarica) which reported for the first time for this species in Thailand. The specimens were collected in Khon Kaen and Udon Thani province. Chromosomal preparation was performed directly from their testes. Conventional and silver nor staining were applied on the metaphase chromosomes. The results demonstrate that migratory bird locust has diploid (2n) chromosome number of 23, with the fundamental number of 23. All of chromosomes have found to be telocentric chromosomes which including eight large, four medium, ten small telocentric and one medium X-telocentric chromosomes. The sex-system has been characterized to be X0. The NOR location have found closely in centromeric region of all chromosomes. Meiotic study have confirmed and identified the diploid number and sex chromosome, respectively. The karyotype formula of this species could be deduced as 2n (23) = L^t₈+M^t₄+S^t₁₀+X-chromosome.