Article
Plant Sciences
Xiaofen Yu, Mengyun Qin, Minghao Qu, Quan Jiang, Sumin Guo, Zhenghai Chen, Yufang Shen, Guodong Fu, Zhangjun Fei, Hongwen Huang, Lei Gao, Xiaohong Yao
Summary: Despite a lack of documented homoploid hybridization events in plants, this study provides insights into the evolutionary consequence of homoploid hybridization in kiwifruit species. Through genome sequencing and population genomic analyses, the study reveals that A. zhejiangensis is mainly composed of F-1 hybrids of A. hemsleyana and A. eriantha, with gene flow initiating about 0.98 million years ago. The study also identifies five inversions containing genes related to pollen germination and pollen tube growth that may account for the fertility breakdown in hybrids. Despite distinct morphological traits, A. zhejiangensis does not initiate speciation.
Article
Genetics & Heredity
Pedro H. N. Ferreira, Fernando H. S. Souza, Renata L. de Moraes, Manolo F. Perez, Francisco de M. C. Sassi, Patrik F. Viana, Eliana Feldberg, Tariq Ezaz, Thomas Liehr, Luiz A. C. Bertollo, Marcelo de B. Cioffi
Summary: Allopatry is considered to be a main contributor to Neotropical biodiversity. In this study, the genetic divergence of five Pyrrhulina species was assessed using population genomics, and the results were combined with cytogenetic data. The findings indicate that molecular genetic diversity is consistent with chromosomal features, and species located in the same geographical region have a closer relationship.
FRONTIERS IN GENETICS
(2022)
Article
Genetics & Heredity
Fernando Montezano Fernandes, Marisa Vieira de Queiroz, Leandro Lopes da Silva, Daiana Maria Queiroz Azevedo, Jorge Luis Badel, Acelino Couto Alfenas
Summary: This study investigated the karyotype and genetic variability of Ceratocystis fimbriata isolates from different host plants and geographical origins in Brazil. Chromosomal polymorphism was observed, indicating genomic differences and chromosomal rearrangements in the species complex. REMAP analysis revealed high genetic variability and clustering of isolates from the same host. These findings provide new insights into the chromosomal diversity and genome organization of the C. fimbriata complex.
FUNGAL GENETICS AND BIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Juliana Nascimento Moraes, Patrik Ferreira Viana, Ramon Marin Favarato, Vanessa Susan Pinheiro-Figliuolo, Eliana Feldberg
Summary: This study cytogenetically analyzed six species of the Curimatidae family, revealing karyotypic variations and the presence of repetitive DNA sequences in certain species for the first time. This indicates the impact of non-Robertsonian rearrangements on the evolution of this family.
GENETICS AND MOLECULAR BIOLOGY
(2022)
Article
Genetics & Heredity
Thomas C. Nelson, Angela M. Stathos, Daniel D. Vanderpool, Findley R. Finseth, Yao-wu Yuan, Lila Fishman
Summary: The study uses genome-wide sampling to investigate the phylogenomics of monkeyflowers in Mimulus section Erythranthe. Results reveal a re-interpretation of the sister species relationship between M. lewisii and M. cardinalis, demonstrating the impact of gene flow and introgression on species affinities.
Article
Genetics & Heredity
Sara J. Hanson, Eoin O. Cinneide, Letal Salzberg, Kenneth H. Wolfe, Jamie McGowan, David A. Fitzpatrick, Kate Matlin
Summary: The study revealed low levels of nucleotide sequence diversity within the Ogataea polymorpha species complex, as well as identified chromosomal rearrangements within and between species. Additionally, an interspecies hybrid between O. polymorpha and O. parapolymorpha was discovered, with evidence of loss of heterozygosity following hybridization.
G3-GENES GENOMES GENETICS
(2021)
Article
Multidisciplinary Sciences
Willam Oliveira da Silva, Celina Coelho Rosa, Malcolm Andrew Ferguson-Smith, Patricia Caroline Mary O'Brien, Juliane Saldanha, Rogerio Vieira Rossi, Julio Cesar Pieczarka, Cleusa Yoshiko Nagamachi
Summary: This study investigated the cytogenetics and molecular biology of Oecomys auyantepui, and found that it has a multiple sex system (XX/XY1Y2) and described an amended karyotype. Cytogenetic data indicated that O. auyantepui may exist in two lineages, and molecular data supported O. auyantepui as a monophyletic taxon.
SCIENTIFIC REPORTS
(2022)
Article
Biochemistry & Molecular Biology
Dawid Owsian, Julita Gruchota, Olivier Arnaiz, Jacek K. Nowak
Summary: The study investigates the role of the Spt4-Spt5 complex in non-coding transcription and genome rearrangements using Paramecium tetraurelia as a model organism. The results show that Spt4 is essential for the expression of the germline genome and necessary for developmental genome rearrangements. Silencing of SPT4 genes leads to the absence of double-stranded ncRNAs and reduced levels of scnRNAs. Additionally, a germline-specific Spt4-Spt5m complex is found to be necessary for the transfer of the scnRNA-binding PIWI protein between the germline and somatic nucleus.
NUCLEIC ACIDS RESEARCH
(2022)
Article
Plant Sciences
A. Cius, C. A. Lorscheider, L. M. Barbosa, A. C. Prizon, C. H. Zawadzki, L. A. Borin-Carvalho, F. E. Porto, A. L. B. Portela-Castro
Summary: Based on the study of Rineloricaria pentamaculata population, it was found that their karyotypic data is similar to most populations, indicating that the cytogenetic characteristics of this species are relatively conservative. However, Robertsonian chromosomal rearrangements may have occurred in some populations with derived features.
Review
Biochemistry & Molecular Biology
Karine Frehner Kavalco, Rubens Pasa
Summary: This article presents a concept that explains the pattern of occurrence of widely distributed organisms with large chromosomal diversity, large or small molecular divergence, and the insufficiency or absence of morphological identity. Through cytogenetic studies and molecular and biological data, the authors observed morphologically indistinguishable individuals with different locally fixed karyomorphs and phylogeographic discontinuity. This suggests that the biological process behind this pattern lies mainly in the organization of the genomes rather than the ecosystems or external morphology.
GENETICS AND MOLECULAR BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Geize Aparecida Deon, Larissa Glugoski, Terumi Hatanaka, Francisco de Menezes Cavalcante Sassi, Viviane Nogaroto, Luiz Antonio Carlos Bertollo, Thomas Liehr, Ahmed Al-Rikabi, Orlando Moreira Filho, Marcelo de Bello Cioffi, Marcelo Ricardo Vicari
Summary: This study investigates the chromosomal rearrangements in the Neotropical armored catfish genus Harttia using powerful tools such as comparative whole chromosome painting. The results reveal the importance of translocation events in the karyotype evolution of Harttia species, as well as the independent origin of two types of multiple sex chromosomes.
GENETICS AND MOLECULAR BIOLOGY
(2022)
Article
Cell Biology
Mara G. Tavares, Gisele A. Teixeira
Summary: The study used cytogenetic techniques to compare the karyotypes of 3 Eumeninae species, revealing differences in chromosome number and karyotypic characteristics among them. The findings contribute to understanding chromosomal evolution in Eumeninae wasps.
CYTOGENETIC AND GENOME RESEARCH
(2021)
Article
Cell Biology
Kessia L. Souza, Marco A. Peixoto, Cynthia A. V. Barreto, Renato N. Feio, Jorge A. Dergam
Summary: The tree frog Aplastodiscus is a Neotropical taxon with high levels of diploid number variation. This study reports karyotypic information on 4 species, supporting multiple and independent chromosome fusion events within Aplastodiscus.
CYTOGENETIC AND GENOME RESEARCH
(2021)
Article
Ecology
Jinhuan Wang, Weiting Su, Yi Hu, Shengbin Li, Patricia C. M. O'Brien, Malcolm A. Ferguson-Smith, Fengtang Yang, Wenhui Nie
Summary: Through chromosome painting experiments, we found that different species within Ciconiiformes have different chromosomal rearrangements. Some small bi-armed chromosomes may have evolved from fusions of two microchromosomes. Additionally, a fusion segment homologous to GGA 7 and 8 may serve as a cytogenetic signature that connects the Ardeidae and Threskiornithidae families.
BMC ECOLOGY AND EVOLUTION
(2022)
Article
Pharmacology & Pharmacy
Jong Youn Baik, Hye-Jin Han, Kelvin H. Lee
Summary: MTX-mediated gene amplification can lead to cell line instability, with DNA double-strand breaks (DSBs) being associated with chromosomal rearrangements. MTX treatment causes nucleotide shortage, leading to an increase in DSBs, resulting in extensive chromosomal rearrangements after the gene amplification process.
