98%
921
2 minutes
20
Spatial arrangement of chromosomes is responsible for gene expression in Plasmodium parasites. However, methods for rearranging chromosomes have not been established, which makes it difficult to investigate its role in detail. Here, we report a method for splitting chromosome in rodent malaria parasite by CRISPR/Cas9 system using fragments in which a telomere and a centromere were incorporated. The resultant split chromosomes segregated accurately into daughter parasites by the centromere. In addition, elongation of de novo telomeres were observed, indicating its proper function. Furthermore, chromosome splitting had no effect on development of parasites. Splitting of the chromosome is expected to alter its spatial arrangement, and our method will thus be useful for investigating its biological role related with gene expression.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8870493 | PMC |
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0260176 | PLOS |
J Dairy Sci
September 2025
Department of Animal and Dairy Sciences, University of Wisconsin, Madison, WI, 53706. Electronic address:
Fertility traits such as daughter pregnancy rate (DPR), cow conception rate, and heifer conception rate are key predictors of reproductive performance in dairy herds. However, their low heritability, likely due to their multifactorial nature and difficulty in measuring phenotypes, poses challenges for genetic improvement. Oocyte competence, encompassing nuclear and cytoplasmic maturation, is a critical factor influencing fertility.
View Article and Find Full Text PDFPopulations that colonize islands experience novel selective pressures, fluctuations in size, and changes to their connectivity. Owing to their unique geographic setting, islands can function as natural laboratories in which to examine the interactions between demographic history and natural selection replicated across isolated populations. We used whole genome sequences of wild-caught deer mice ( ) from two islands (Saturna and Pender) and one mainland location (Maple Ridge) in the Gulf Islands region of coastal British Columbia to investigate two primary determinants of genome-wide diversity: chromosomal inversions and non-equilibrium demographic history.
View Article and Find Full Text PDFBio Protoc
August 2025
Dept of Biochemistry, University of Alberta, Edmonton, AB, Canada.
Protein-protein interactions facilitate cellular functions through the creation of networks and multi-protein complexes. Mapping the interactions within and between protein networks and elucidating the composition of protein complexes provides critical insight into biological processes. Interactions among soluble cytoplasmic proteins have been extensively investigated through the application of immunoaffinity capture as well as conventional nuclear two-hybrid testing.
View Article and Find Full Text PDFJ Fungi (Basel)
August 2025
State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China.
A recent study challenges a fundamental principle of eukaryotic biology that each nucleus houses a complete genome. Two plant pathogenic fungi, and , exhibit a segregated pattern of haploid chromosome distribution across two or more nuclei within each cell. The unequal distribution of the genome between nuclei suggests a coordinated system of internuclear recognition and regulation of cellular functions, a phenomenon previously associated with communication between nuclei of opposite mating type in both ascomycetes and basidiomycetes.
View Article and Find Full Text PDFAnn Bot
August 2025
DIADE, Université de Montpellier, IRD, CIRAD; 911 Avenue Agropolis, 34394 Montpellier, France.
Backgrounds And Aims: In palms, many dioecious species have emerged from at least 8 independent events; the mechanisms of sex determination remain poorly understood. Here, we identify and compare the sex chromosomes of Kerriodoxa elegans with those of the well-studied date palm (Phoenix dactylifera), which evolved dioecy independently from a monoclinous common ancestor.
Methods: We developed target sequence capture kits and inferred sex-linked genes using a probabilistic approach in both species.