Dataset Information

Karyotype and genome size variation in Delphinium subg. Anthriscifolium (Ranunculaceae).

ABSTRACT: Five taxa of Delphiniumsubg.Anthriscifolium have been karyologically studied through chromosome counting, chromosomal measurement, and karyotype symmetry. Each taxon that we investigated has a basic chromosome number of x = 8, D.anthriscifoliumvar.savatieri, D.anthriscifoliumvar.majus, D.ecalcaratum, and D.callichromum were diploid with 2n = 16, while D.anthriscifoliumvar.anthriscifolium was tetraploid with 2n = 32. Monoploid chromosome sets of the investigated diploid taxa contained 1 metacentric chromosome, 3 submetacentric chromosomes, and 4 subtelocentric chromosomes. Higher interchromosomal asymmetry (CV_CL) was present in D.ecalcaratum and D.callichromum than in other taxa. The highest levels of intrachromosomal asymmetry (M_CA) and heterogeneity in centromere position (CV_CI) were found in D.anthriscifoliumvar.majus. Diploid and tetraploid genome sizes varied by 3.02-3.92 pg and 6.04-6.60 pg, respectively. Karyotype and genome size of D.anthriscifoliumvar.savatieri, D.anthriscifoliumvar.majus, D.callichromum, and D.ecalcaratum were reported for the first time. Finally, based on cytological and morphological data, the classification of Delphiniumanthriscifolium was revised.

SUBMITTER: Luo XY

PROVIDER: S-EPMC10612113 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature

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Karyotype and genome size variation in Delphinium subg. Anthriscifolium (Ranunculaceae).

Luo Xiao-Yu XY Nie Tang-Jie TJ Liu Heng H Ding Xue-Fei XF Huang Ying Y Guo Chun-Ce CC Zhang Wen-Gen WG

PhytoKeys 20231018

Five taxa of Delphiniumsubg.Anthriscifolium have been karyologically studied through chromosome counting, chromosomal measurement, and karyotype symmetry. Each taxon that we investigated has a basic chromosome number of x = 8, D.anthriscifoliumvar.savatieri, D.anthriscifoliumvar.majus, D.ecalcaratum, and D.callichromum were diploid with 2n = 16, while D.anthriscifoliumvar.anthriscifolium was tetraploid with 2n = 32. Monoploid chromosome sets of the investigated diploid taxa contain ...[more]

PMID: 37901134

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Project description:BackgroundThe Trypanosoma cruzi genome was sequenced from a hybrid strain (CL Brener). However, high allelic variation and the repetitive nature of the genome have prevented the complete linear sequence of chromosomes being determined. Determining the full complement of chromosomes and establishing syntenic groups will be important in defining the structure of T. cruzi chromosomes. A large amount of information is now available for T. cruzi and Trypanosoma brucei, providing the opportunity to compare and describe the overall patterns of chromosomal evolution in these parasites.Methodology/principal findingsThe genome sizes, repetitive DNA contents, and the numbers and sizes of chromosomes of nine strains of T. cruzi from four lineages (TcI, TcII, TcV and TcVI) were determined. The genome of the TcI group was statistically smaller than other lineages, with the exception of the TcI isolate Tc1161 (José-IMT). Satellite DNA content was correlated with genome size for all isolates, but this was not accompanied by simultaneous amplification of retrotransposons. Regardless of chromosomal polymorphism, large syntenic groups are conserved among T. cruzi lineages. Duplicated chromosome-sized regions were identified and could be retained as paralogous loci, increasing the dosage of several genes. By comparing T. cruzi and T. brucei chromosomes, homologous chromosomal regions in T. brucei were identified. Chromosomes Tb9 and Tb11 of T. brucei share regions of syntenic homology with three and six T. cruzi chromosomal bands, respectively.ConclusionsDespite genome size variation and karyotype polymorphism, T. cruzi lineages exhibit conservation of chromosome structure. Several syntenic groups are conserved among all isolates analyzed in this study. The syntenic regions are larger than expected if rearrangements occur randomly, suggesting that they are conserved owing to positive selection. Mapping of the syntenic regions on T. cruzi chromosomal bands provides evidence for the occurrence of fusion and split events involving T. brucei and T. cruzi chromosomes.

Dataset Information

Karyotype and genome size variation in Delphinium subg. Anthriscifolium (Ranunculaceae).

Publications

Karyotype and genome size variation in <i>Delphinium</i> subg. <i>Anthriscifolium</i> (Ranunculaceae).

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Dataset Information

Karyotype and genome size variation in Delphinium subg. Anthriscifolium (Ranunculaceae).

Publications

﻿Karyotype and genome size variation in <i>Delphinium</i> subg. <i>Anthriscifolium</i> (Ranunculaceae).

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Karyotype and genome size variation in <i>Delphinium</i> subg. <i>Anthriscifolium</i> (Ranunculaceae).