Comparative Cytogenetics最新文献

Dynamic meiotic behavior and evolutionary insights of supernumerary B chromosomes in the hangingfly Bittacuscirratus (Mecoptera, Bittacidae). Dynamic垂蝇（翅翅目，垂蝇科）多余B染色体的减数分裂行为及其进化意义。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2025-06-04 eCollection Date: 2025-01-01 DOI: 10.3897/compcytogen.19.153340

Le-Le He, Ying Miao, He-Hong Wang, Jie Zhang, Bao-Zhen Hua

{"title":"Dynamic meiotic behavior and evolutionary insights of supernumerary B chromosomes in the hangingfly Bittacuscirratus (Mecoptera, Bittacidae).","authors":"Le-Le He, Ying Miao, He-Hong Wang, Jie Zhang, Bao-Zhen Hua","doi":"10.3897/compcytogen.19.153340","DOIUrl":"10.3897/compcytogen.19.153340","url":null,"abstract":"Supernumerary B chromosomes are significant dispensable genetic elements that follow their own species-specific evolutionary pathways. Despite their widespread occurrence, comprehensive analyses of their meiotic behavior remain limited. In this study, we present the first systematic investigation of B chromosome morphology and meiotic behavior in the hangingfly Bittacuscirratus Tjeder, 1956 using cytogenetic approaches. The male basal chromosome numbers of B.cirratus is 2n = 30 + XO, with 0-5 polymorphic B chromosomes. Intraspecific B chromosome polymorphism manifests as various distinct morphotypes ranging from punctiform, bicentric, and ring-shaped to larger coiled forms, indicating that the B chromosomes may undergo rapid structural changes. During meiosis, B chromosomes display transmission drive through asymmetric segregation, preferentially accumulating in one daughter cell. Most B chromosomes formed univalents, with few forming bivalents or trivalents at meiosis I. Three unconventional retention mechanisms were identified in univalent B chromosomes: (1) associating with a nonhomologous chromosome, (2) accumulating near spindle poles, and (3) contributing to unequal spindle formation. Based on the abundant chromosomal changes of A chromosomes and stable XX/XO sex determination, we infer that the B chromosomes likely originated from multiple A chromosomes in B.cirratus. The roles of B chromosomes in the cell cycle and individual fitness are briefly discussed, and the evolutionary scenario is putatively put forward for the diversification of B chromosomes.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"19 ","pages":"91-107"},"PeriodicalIF":1.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12159664/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144287019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chromosomes of four species of dobsonflies, in the genus Protohermes (Megaloptera, Corydalidae, Corydalinae) from East Asia. 东亚原斑蛉属（大翅目，斑蛉科，斑蛉科）四种的Chromosomes。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2025-04-16 eCollection Date: 2025-01-01 DOI: 10.3897/compcytogen.19.146501

Yoshinori Takeuchi, Koji Iizuka, Hiroyuki Koishi, Hidehiro Hoshiba

{"title":"Chromosomes of four species of dobsonflies, in the genus Protohermes (Megaloptera, Corydalidae, Corydalinae) from East Asia.","authors":"Yoshinori Takeuchi, Koji Iizuka, Hiroyuki Koishi, Hidehiro Hoshiba","doi":"10.3897/compcytogen.19.146501","DOIUrl":"https://doi.org/10.3897/compcytogen.19.146501","url":null,"abstract":"We analyzed chromosomes of four species of East Asian dobsonflies (Megaloptera: Corydalidae): Protohermesgrandis (Thunberg, 1781), P.immaculatus Kuwayama, 1964, P.disjunctus Liu, Hayashi et Yang, 2007 and P.costalis (Walker, 1853). The chromosome number in all species was 2n = 24, consisting of 11 pairs of autosomes plus the XX chromosomes in females and the Xyp in males. The karyotype of P.immaculatus which occurs in near the central part of the Ryukyu Islands, and is a vicarious species of P.grandis, was similar to the karyotype of P.grandis. On the other hand, the karyotype of P.disjunctus, which is from the Sakishima Islands, and is a vicarious species of P.costalis, resembled that of P.costalis. The X chromosomes are submetacentric, while the Y is the smallest, dot-like chromosome of the set. The sex chromosomes of the first meiotic metaphase (MI) spermatocytes in all species invariably appear as a bivalent-like structure known as parachut bivalents Xyp, suggesting that the species in this genus share a common sex-bivalent mechanism.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"19 ","pages":"75-82"},"PeriodicalIF":1.0,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12018884/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144024991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chromosomes of four fishfly species (Megaloptera, Corydalidae, Chauliodinae) from North America. Chromosomes产于北美洲的四种鱼蝇（大翅目，蛱蝶科，蛱蝶科）。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2025-04-16 eCollection Date: 2025-01-01 DOI: 10.3897/compcytogen.19.146136

Yoshinori Takeuchi, Koji Iizuka, Tadashi Nakazato, Hiroyuki Koishi, Hidehiro Hoshiba

{"title":"Chromosomes of four fishfly species (Megaloptera, Corydalidae, Chauliodinae) from North America.","authors":"Yoshinori Takeuchi, Koji Iizuka, Tadashi Nakazato, Hiroyuki Koishi, Hidehiro Hoshiba","doi":"10.3897/compcytogen.19.146136","DOIUrl":"https://doi.org/10.3897/compcytogen.19.146136","url":null,"abstract":"We analyzed chromosomes of four species of fishflies (Megaloptera: Chauliodinae). Three species were from western North America (Dysmicohermesdisjunctus (Walker, 1866), Dysmicohermesingens Chandler, 1954, and Orohermescrepusculus (Chandler, 1954)), and another one from eastern North America (Nigroniaserricornis (Say, 1824)). The chromosome number of the three western species was 2n = 22, with the karyotype consisting of 10 pairs of autosomes plus XY in males. The X chromosomes of these three species are subtelocentric, while the Y chromosomes are small and dot-like. Of the ten pairs of autosomes, the last pair is substantially smaller than the others. The chromosome number in the first meiotic metaphase in spermatocytes of N.serricornis from Michigan was n = 10 (9 autosomal bivalents + Xyp in the male). The sex chromosomes of N.serricornis formed parachute-type bivalents synchronously with the autosomes. The parachute-type bivalent Xyp has also been found in four fishflies and four dobsonflies (Megaloptera: Corydalinae) from East Asia, as well as in a fishfly and a dobsonfly from North America. These data suggest that the two subfamilies of Corydalidae share a common sex-bivalent mechanism, along with many beetles (Coleoptera).","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"19 ","pages":"83-90"},"PeriodicalIF":1.0,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12018883/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144049400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chromosomal polymorphism in natural populations of Chironomusborokensis Kerkis, Filippova, Shobanov, Gunderina et Kiknadze, 1988 (Diptera, Chironomidae). Chironomusborokensis Kerkis, Filippova, Shobanov, Gunderina et Kiknadze, 1988（双翅目，Chironomusborokensis科）自然居群的Chromosomal多态性。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2025-04-15 eCollection Date: 2025-01-01 DOI: 10.3897/compcytogen.19.141735

Veronika V Golygina, Andrey D Broshkov, Oksana V Ermolaeva

{"title":"Chromosomal polymorphism in natural populations of Chironomusborokensis Kerkis, Filippova, Shobanov, Gunderina et Kiknadze, 1988 (Diptera, Chironomidae).","authors":"Veronika V Golygina, Andrey D Broshkov, Oksana V Ermolaeva","doi":"10.3897/compcytogen.19.141735","DOIUrl":"https://doi.org/10.3897/compcytogen.19.141735","url":null,"abstract":"Chromosomal polymorphism has been studied in 31 natural populations of Ch.borokensis. For 11 out of 31 populations quantitative analysis of chromosomal polymorphism has been performed. Data from previous publications (10 populations) have also been used to perform an overview of the chromosomal polymorphism of Ch.borokensis and to establish the species range. Most studied populations show a high level of chromosomal polymorphism: on average 66.1 ± 2.6% of specimens were heterozygotes with 1.1 ± 0.6 heterozygotic inversions per larvae. The number of banding sequences found in populations varied from 7 to 18 per population with an average of 12 ± 3. Inversions were found in all chromosomal arms. Besides inversions, B-chromosome was present in 13 populations, and 5 translocations were found. The total number of banding sequences found in banding sequence pool of Ch.borokensis is 40. Twenty six banding sequences are described for the first time for the species.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"19 ","pages":"51-74"},"PeriodicalIF":1.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12015552/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143993374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microsatellite repeat mapping shows inner chromosomal diversification in highly conserved karyotypes of Asian cyprinid fishes. Microsatellite重复作图显示亚洲鲤科鱼类高度保守的核型内部染色体多样化。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2025-03-31 eCollection Date: 2025-01-01 DOI: 10.3897/compcytogen.19.141557

Phichaya Buasriyot, Weerayuth Supiwong, Nawarat Muanglen, Nattasuda Donbundit, Sukhonthip Ditcharoen, Phonluang Chumpol, Pasakorn Saenjundaeng, Sampan Tongnunui, Sathit Arunsang, Weera Thongnetr, Sitthisak Juntharat, Kriengkrai Seetapan, Thomas Liehr, Marcelo B Cioffi, Petr Rab, Alongklod Tanomtong

{"title":"Microsatellite repeat mapping shows inner chromosomal diversification in highly conserved karyotypes of Asian cyprinid fishes.","authors":"Phichaya Buasriyot, Weerayuth Supiwong, Nawarat Muanglen, Nattasuda Donbundit, Sukhonthip Ditcharoen, Phonluang Chumpol, Pasakorn Saenjundaeng, Sampan Tongnunui, Sathit Arunsang, Weera Thongnetr, Sitthisak Juntharat, Kriengkrai Seetapan, Thomas Liehr, Marcelo B Cioffi, Petr Rab, Alongklod Tanomtong","doi":"10.3897/compcytogen.19.141557","DOIUrl":"10.3897/compcytogen.19.141557","url":null,"abstract":"The barbels of the subfamilies ´Poropuntinae´ and Smiliogastrinae within the family Cyprinidae play a significant role as a food source for fish in artisanal fisheries and are highly valued as ornamental fish in Thailand. In this study, we employed both conventional and molecular cytogenetics to analyze the karyotype of 15 fish species from two cyprinid lineages. All analyzed species had a diploid chromosome number of 2n = 50. Despite sharing the same 2n, our analyses revealed species-specific distribution patterns of the mapped microsatellite motifs [(CA)₁₅, (TA)₁₅, (CAC)₁₀, and (CGG)₁₀]. They were predominantly found at telomeric sites of all-to-few chromosomes. Additionally, some species exhibited a widespread distribution of the mapped microsatellites across the chromosomes while others showed no signal. These variations reflect the evolutionary divergence and chromosomal diversity within the cyprinids. Thus, our findings support the 2n stability in cyprinoid lineages while emphasizing the intrachromosomal evolutionary diversity accompanied by species-specific microsatellite distribution.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"19 ","pages":"29-50"},"PeriodicalIF":1.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11976306/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143812835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High variability in chromosome number from a clade within the gourami family (Teleostei, Osphronemidae). High gourami科（Teleostei, ospronemidae）中一个分支的染色体数目变异。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2025-02-25 eCollection Date: 2025-01-01 DOI: 10.3897/compcytogen.19.132971

Brendan Mobley, Andrew P Anderson

引用次数: 0

Telomere DNA in the insect order Dermaptera and the first evidence for the non-canonical telomeric motif TTCGG in Arthropoda. Telomere昆虫皮翅目DNA和节肢动物非规范端粒基序TTCGG的首个证据。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2025-02-07 eCollection Date: 2025-01-01 DOI: 10.3897/compcytogen.19.142613

Vladimir A Lukhtanov

引用次数: 0

Evolutionary dynamics of the B chromosomes in the fish species Prochiloduslineatus Valenciennes, 1837 of the Paraná River Basin. Evolutionary鱼类Prochiloduslineatus Valenciennes的B染色体动力学，1837 of帕拉那<e:1>河流域。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2025-01-20 eCollection Date: 2025-01-01 DOI: 10.3897/compcytogen.19.135127

Manolo Penitente, Caio Augusto Gomes Goes, Rodrigo Zeni Dos Santos, Ricardo Utsunomia, Fausto Foresti, Fabio Porto-Foresti

{"title":"Evolutionary dynamics of the B chromosomes in the fish species Prochiloduslineatus Valenciennes, 1837 of the Paraná River Basin.","authors":"Manolo Penitente, Caio Augusto Gomes Goes, Rodrigo Zeni Dos Santos, Ricardo Utsunomia, Fausto Foresti, Fabio Porto-Foresti","doi":"10.3897/compcytogen.19.135127","DOIUrl":"https://doi.org/10.3897/compcytogen.19.135127","url":null,"abstract":"The fish species Prochiloduslineatus has an interesting B chromosome system, with three morphological types as acrocentric, metacentric, and submetacentric. However, most cytogenetic studies on this species are restricted to the natural population of the Mogi Guaçu River. Given this, the present work aimed to study the structure karyotypic profile as well as the occurrence of supernumeraries in P.lineatus in several localities in the Paraná River basin, where this species is abundant. The results obtained showed a predominantly conserved karyotypic macrostructure and the presence of B chromosomes in all the seven localities studied, with the exception of the Apa River. Additionally, new variants of morphological characteristics were found in the population of the Batalha River (Reginópolis). These results allow us to infer that there is a large occurrence of B chromosomes in this species, with important differences in B chromosome frequency between the populations, especially in acrocentric and submetacentric B variants. Considering the possible origin and evolution of B chromosomes in P.lineatus, our results allow us to describe the dispersion of metacentric B variants, in contrast with the elimination observed in acrocentric and submetacentric variants.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"19 ","pages":"1-12"},"PeriodicalIF":1.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11773350/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143069384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gallophilous theory of cyclical parthenogenesis in aphids (Homoptera, Aphidinea). Gallophilous蚜虫周期性孤雌生殖理论（同翅目，蚜虫科）。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2024-12-17 eCollection Date: 2024-01-01 DOI: 10.3897/compcytogen.18.136095

Ilya A Gavrilov-Zimin

{"title":"Gallophilous theory of cyclical parthenogenesis in aphids (Homoptera, Aphidinea).","authors":"Ilya A Gavrilov-Zimin","doi":"10.3897/compcytogen.18.136095","DOIUrl":"10.3897/compcytogen.18.136095","url":null,"abstract":"The paper elaborates theoretical basis of the origin of aphid cyclical parthenogenesis in view of the original life of these insects in strobiloid galls on Picea spp. The period of gall opening is greatly extended in time, which prevents normal panmixia and creates a selective advantage for parthenogenetic reproduction. Migration of aphids to secondary host plants, on which closed galls never form, parthenogenetic reproduction on these plants, and the subsequent simultaneous return of \"remigrants\" to the main host plant make it possible to synchronize the development of the bisexual generation and achieve mass panmixia at the end of the life cycle only; it coincides with the end of summer growth shoots or the autumn end of the vegetation period as a whole. The evolutionary transition of aphids from conifers to angiosperms in the Cretaceous period in parallel meant the possibility of development in more spacious galls accommodating several consecutive parthenogenetic generations, the transition to viviparity and telescopic embryonization, significantly accelerating the propagation.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"18 ","pages":"247-276"},"PeriodicalIF":1.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11669011/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142900164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Number and location of rDNA clusters in the superfamilies Tenthredinoidea and Cynipoidea (Hymenoptera): an update. 膜翅目 Tenthredinoidea 和 Cynipoidea 超科 rDNA 簇的数量和位置：更新。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2024-12-04 eCollection Date: 2024-01-01 DOI: 10.3897/compcytogen.18.142301

Vladimir E Gokhman, Valentina G Kuznetsova, Boris A Anokhin

引用次数: 0