A new diploid chromosome number in Gymnopleurus Illiger, 1803 (Coleoptera: Scarabaeidae, Scarabaeinae) from Haryana, India
نویسندگان
چکیده
The chromosomes obtained from scarab beetle Gymnopleurus mundus Wied., 1819 of subfamily Scarabaeinae were studied using standard staining and C-banding. The karyotype is comprised of 14 chromosomes with meioformula, 6AA+Xyp. The analysis of constitutive heterochromatin (CH) revealed small blocks located in the centromeric region of all chromosomes. Some of the anomalies like polypoidy, decondensation, stickyness and fragmentation of the chromatids were also encountered. The reduction of chromosome number and with conserved sex chromosome mechanism in G. mundus as compared to other Gymnopleurus spp. is suggestive of the Robertsonian fusion of autosomes having played some role in the evolution of karyotype in this genus.
منابع مشابه
A new cytological record of two scarab beetle species from the genus Gymnopleurus Illiger, 1803 (Coleoptera: Scarabaeidae)
Karyological investigations on two Gymnopleurus spp.; Gymnopleurus miliaris (F.) and Gymnopleurus parvus (MacL.) are under taken in the present study. Meioformula of G. miliaris (17AA+Xyp) and G. parvus (8AA+Xyp) are presented. None of these beetles exhibited a modal polyphagan karyotype. However, Xyp was found to be the male sex chromosome mechanism. Most chromosomes are acro and subtelocentri...
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