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Geographical patterns of chromosomal differentiation in the brachypterous grasshopper Podisma sapporensis (Orthoptera : Acrididae)

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Title: Geographical patterns of chromosomal differentiation in the brachypterous grasshopper Podisma sapporensis (Orthoptera : Acrididae)
Authors: Warchalowska-Sliwa, Elzbieta Browse this author
Tatsuta, Haruki Browse this author
Akimoto, Shin-Ichi Browse this author →KAKEN DB
Maryanska-Nadachowska, Anna Browse this author
Kowalczyk, Marek Browse this author
Bugrov, Alexander Browse this author
Keywords: grasshoppers
chromosome races
Issue Date: 15-May-2008
Publisher: Institute of Entomology of the Czech Academy of Sciences
Journal Title: European Journal of Entomology
Volume: 105
Issue: 2
Start Page: 185
End Page: 196
Publisher DOI: 10.14411/eje.2008.027
Abstract: The distribution patterns of the X0/XX and neo-XY/neo-XX chromosome races, subraces, and "hybrids" between subraces of the grasshopper P. sapporensis were analyzed. The origin of the observed variation is Robertsonian translocations between a sex chromosome and an autosome, and chromosome rearrangements. The fixation levels of inversions varied depending on geographic regions. No hybrid population is known implying that a strong reproductive isolation system exists in hybrids between the different chromosomal races. The probable reasons for the purity of X0 and neo-XY chromosome races and high chromosome polymorphism in contact zones between chromosomal subraces are discussed. The presence of isolating barriers between chromosome races indicates a review of the taxonomic structure of P. sapporensis is required. It is proposed to divide P. sapporensis into two sibling species, which differ in the chromosome mechanisms of the sex determination system. The analysis of the distribution of chromosomal races and subraces of P. sapporensis allows a reconstruction of the history of this species in the Okhotsk sea region.
Type: article
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 秋元 信一

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