Comparative Cytogenetics最新文献_第6页

The Kengyiliahirsuta karyotype polymorphisms as revealed by FISH with tandem repeats and single-gene probes. 用串联重复和单基因探针进行 FISH 检测发现的 Kengyiliahirsuta 染色体核型多态性。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-11-03 eCollection Date: 2021-01-01 DOI: 10.3897/compcytogen.v15.i4.71525

Xiaoyan Tao, Bo Liu, Quanwen Dou

{"title":"The Kengyiliahirsuta karyotype polymorphisms as revealed by FISH with tandem repeats and single-gene probes.","authors":"Xiaoyan Tao, Bo Liu, Quanwen Dou","doi":"10.3897/compcytogen.v15.i4.71525","DOIUrl":"10.3897/compcytogen.v15.i4.71525","url":null,"abstract":"Kengyiliahirsuta (Keng, 1959) J. L. Yang, C. Yen et B. R. Baum, 1992, a perennial hexaploidy species, is a wild relative species to wheat with great potential for wheat improvement and domestication. The genome structure and cross-species homoeology of K.hirsuta chromosomes with wheat were assayed using 14 single-gene probes covering all seven homoeologous groups, and four repetitive sequence probes 45S rDNA, 5S rDNA, pAs1, and (AAG)10 by FISH. Each chromosome of K.hirsuta was well characterized by homoeological determination and repeats distribution patterns. The synteny of chromosomes was strongly conserved in the St genome, whereas synteny of the Y and P genomes was more distorted. The collinearity of 1Y, 2Y, 3Y and 7Y might be interrupted in the Y genome. A new 5S rDNA site on 2Y might be translocated from 1Y. The short arm of 3Y might involve translocated segments from 7Y. The 7 Y was identified as involving a pericentric inversion. A reciprocal translocation between 2P and 4P, and tentative structural aberrations in the subtelomeric region of 1PL and 4PL, were observed in the P genome. Chromosome polymorphisms, which were mostly characterized by repeats amplification and deletion, varied between chromosomes, genomes, and different populations. However, two translocations involving a P genome segmental in 3YL and a non-Robertsonial reciprocal translocation between 4Y and 3P were identified in two independent populations. Moreover, the proportion of heterozygous karyotypes reached almost 35% in all materials, and almost 80% in the specific population. These results provide new insights into the genome organization of K.hirsuta and will facilitate genome dissection and germplasm utilization of this species.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"15 4","pages":"375-392"},"PeriodicalIF":1.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8580955/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39643912","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

Derived karyotypes in two elephantfish genera (Hyperopisus and Pollimyrus): lowest chromosome number in the family Mormyridae (Osteoglossiformes). 两个象鱼属(大象鱼属和大象鱼属)的衍生核型:象鱼科(骨舌形目)中染色体数目最低。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-10-08 eCollection Date: 2021-01-01 DOI: 10.3897/compcytogen.v15.i4.67681

Sergey Simanovsky, Dmitry Medvedev, Fekadu Tefera, Alexander Golubtsov

{"title":"Derived karyotypes in two elephantfish genera (Hyperopisus and Pollimyrus): lowest chromosome number in the family Mormyridae (Osteoglossiformes).","authors":"Sergey Simanovsky, Dmitry Medvedev, Fekadu Tefera, Alexander Golubtsov","doi":"10.3897/compcytogen.v15.i4.67681","DOIUrl":"https://doi.org/10.3897/compcytogen.v15.i4.67681","url":null,"abstract":"The African weakly electric elephantfish family Mormyridae comprises 22 genera and almost 230 species. Up-to-date cytogenetic information was available for 17 species representing 14 genera. Here we report chromosome number and morphology in Hyperopisusbebe (Lacepède, 1803) and Pollimyrusisidori (Valenciennes, 1847) collected from the White Nile system in southwestern Ethiopia. Both taxa displayed the diploid chromosome number 2n = 40, but they differed in fundamental numbers: FN = 66 in H.bebe and FN = 72 in P.isidori; previously the same diploid chromosome number 2n = 40 was reported in an undescribed species of Pollimyrus Taverne, 1971 (FN = 42) from the same region. Our results demonstrate that not only pericentric inversions, but fusions also played a substantial role in the evolution of the mormyrid karyotype structure. If the hypothesis that the karyotype structure with 2n = 50-52 and prevalence of the uni-armed chromosomes close to the ancestral condition for the family Mormyridae is correct, the most derived karyotype structures are found in the Mormyrus Linnaeus, 1758 species with 2n = 50 and the highest number of bi-armed elements in their compliments compared to all other mormyrids and in Pollimyrusisidori with the highest number of bi-armed elements among the mormyrids with 2n = 40.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"15 4","pages":"345-354"},"PeriodicalIF":1.0,"publicationDate":"2021-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8520028/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39668086","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: 1

The chiasmata systems of Scottish Chysolinalatecincta (Demaison, 1896) (Coleoptera, Chrysomelidae). 苏格兰金蝇的交叉系统(Demaison, 1896)(鞘翅目，金蝇科)。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-09-28 eCollection Date: 2021-01-01 DOI: 10.3897/CompCytogen.v15.i4.68309

Eduard Petitpierre

{"title":"The chiasmata systems of Scottish Chysolinalatecincta (Demaison, 1896) (Coleoptera, Chrysomelidae).","authors":"Eduard Petitpierre","doi":"10.3897/CompCytogen.v15.i4.68309","DOIUrl":"https://doi.org/10.3897/CompCytogen.v15.i4.68309","url":null,"abstract":"The meiotic systems of some Scottish individuals of the rare Chrysolinalatecinctassp.intermedia (Franz, 1938) have been analyzed from meiotic cells at diakinesis to study the types of chromosomal bivalents and the number and locations of their chiasmata. The mean number of unichiasmate was about two-thirds and that of bichiasmate bivalents about one-third. Most chiasmata were at distal positions and there were no pairwise statistically significant differences in the mean number of chiasmata and those of unichiasmate and bichiasmate bivalents between the three surveyed geographic sources of these Scottish individuals. However, pairwise significant differences were found in the mean number of proximal + interstitial chiasmata between Loch Etive (Argyllshire) and both Orkney and Shetland Islands individuals. The presumed higher values of genetic recombination due to the proximal + interstitial chiasmata with regard to the prevailing distal ones, might provide a slight selective advantage to the insular individuals against the more extreme climates of both islands compared with the Loch Etive site.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"15 4","pages":"339-343"},"PeriodicalIF":1.0,"publicationDate":"2021-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8516821/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39668082","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

Study of chromatin diminution in Cyclopskolensis (Copepoda, Crustacea) by radiobiological methods. 用放射生物学方法研究Cyclopskolensis(桡足纲，甲壳纲)的染色质减少。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-09-28 eCollection Date: 2021-01-01 DOI: 10.3897/CompCytogen.v15.i4.64350

Andrey Grishanin, Oksana Chinyakova

引用次数: 1

Comparative analysis of chromosome numbers and sex chromosome systems in Paraneoptera (Insecta). 副翅目（昆虫）染色体数目和性染色体系统的比较分析。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-09-27 eCollection Date: 2021-01-01 DOI: 10.3897/CompCytogen.v15.i3.71866

Valentina G Kuznetsova, Ilya A Gavrilov-Zimin, Snejana M Grozeva, Natalia V Golub

引用次数: 0

Aberrant ontogeneses and life cycles in Paraneoptera. 副翅目的异常发病和生命周期。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-08-25 eCollection Date: 2021-01-01 DOI: 10.3897/compcytogen.v15.i3.70362

Ilya A Gavrilov-Zimin

引用次数: 1

Egg retention, viviparity and ovoviviparity in Paraneoptera 副翅目昆虫的卵保留、胎生和卵生

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-08-03 DOI: 10.3897/compcytogen.v15.i3.70216

Ilya A. Gavrilov-Zimin

引用次数: 0

Egg retention, viviparity and ovoviviparity in Paraneoptera. 副翅目中的留卵、胎生和卵胎生。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-07-31 eCollection Date: 2021-01-01 DOI: 10.3897/CompCytogen.v15i3.70216

Ilya A Gavrilov-Zimin

引用次数: 0

Introduction to the study of chromosomal and reproductive patterns in Paraneoptera. 副翅目染色体和生殖模式研究概论。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-07-19 eCollection Date: 2021-01-01 DOI: 10.3897/compcytogen.v15.i3.69718

Ilya A Gavrilov-Zimin, Snejana M Grozeva, Dmitrii A Gapon, Andrei S Kurochkin, Katia G Trencheva, Valentina G Kuznetsova

引用次数: 7

Chromosomal and DNA barcode analysis of the Melitaea ala Staudinger, 1881 species complex (Lepidoptera, Nymphalidae). 1881种Melitaea ala Staudinger复合体(鳞翅目，蛱蝶科)染色体和DNA条形码分析。

IF 1 4区生物学

Comparative Cytogenetics Pub Date : 2021-06-18 eCollection Date: 2021-01-01 DOI: 10.3897/CompCytogen.v15.i2.66121

Vladimir A Lukhtanov, Anastasia V Gagarina, Elena A Pazhenkova

{"title":"Chromosomal and DNA barcode analysis of the Melitaea ala Staudinger, 1881 species complex (Lepidoptera, Nymphalidae).","authors":"Vladimir A Lukhtanov, Anastasia V Gagarina, Elena A Pazhenkova","doi":"10.3897/CompCytogen.v15.i2.66121","DOIUrl":"https://doi.org/10.3897/CompCytogen.v15.i2.66121","url":null,"abstract":"The species of the Melitaea ala Staudinger, 1881 complex are distributed in Central Asia. Here we show that this complex is a monophyletic group including the species, M. ala, M. kotshubeji Sheljuzhko, 1929 and M. enarea Fruhstorfer, 1917. The haploid chromosome number n=29 is found in M. ala and M. kotshubeji and is, most likely, a symplesiomorphy of the M. ala complex. We show that M. ala consists of four subspecies: M. ala zaisana Lukhtanov, 1999 (=M. ala irtyshica Lukhtanov, 1999, syn. nov.) (South Altai, Zaisan Lake valley), M. ala ala (Dzhungarian Alatau), M. ala bicolor Seitz, 1908 (North, East, Central and West Tian-Shan) and M. ala determinata Bryk, 1940 (described from \"Fu-Shu-Shi\", China). We demonstrate that M. kotshubeji kotshubeji (Peter the Great Mts in Tajikistan) and M. kotshubeji bundeli Kolesnichenko, 1999 (Alai Mts in Tajikistan and Kyrgyzstan) are distinct taxa despite their geographic proximity in East Tajikistan. Melitaea enarea is widely distributed in the southern part of Central Asia and is sympatric with M. kotshubeji.","PeriodicalId":50656,"journal":{"name":"Comparative Cytogenetics","volume":"15 2","pages":"199-216"},"PeriodicalIF":1.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8233298/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39149556","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: 1