Segregation of the Univalent X Chromosome in the Two-Striped Planthopper Acanalonia bivittata
Cytologia, ISSN: 0011-4545, Vol: 88, Issue: 2, Page: 137-142
2023
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Most Recent News
New Cytology Study Findings Have Been Reported by Researchers at Bucknell University (Segregation of the Univalent X Chromosome In the Two-striped Planthopper acanalonia Bivittata )
2023 NOV 01 (NewsRx) -- By a News Reporter-Staff News Editor at NewsRx Life Science Daily -- A new study on Life Sciences - Cytology
Article Description
Chromosomes pair with their homologues to form a bivalent in meiosis I. The formation of bivalent chromosomes, alignment on the metaphase plate, and segregation during anaphase I is critical for correct cell division and production of haploid gametes, yet exceptions to the rule of bivalent formation exist. Here, we studied the segregation of the univalent X chromosome in the two-striped plant hopper Acanalonia bivittata (Hemiptera, Auchenorrhyncha). The species identification was verified through DNA barcoding, and the chromosome number is consistent with previously published karyotypes for the species. We show that A. bivittata male primary spermatocytes have a univalent X chromosome that displays independent and delayed segregation. Univalent segregation was observed to occur after that of the autosomes during early anaphase I and was associated with the loss of microtubule connections to one spindle pole. This work contributes to our knowledge of how chromosomes that lack a pairing partner can be segregated in an environment where they are surrounded by correctly segregating bivalents.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85165512991&origin=inward; http://dx.doi.org/10.1508/cytologia.88.137; https://www.jstage.jst.go.jp/article/cytologia/88/2/88_D-23-00002/_article; https://digitalcommons.bucknell.edu/fac_journ/2113; https://digitalcommons.bucknell.edu/cgi/viewcontent.cgi?article=3188&context=fac_journ; https://dx.doi.org/10.1508/cytologia.88.137
International Society of Cytology
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