Ploidy Determination
Ploidy Determination - Related Videos
07:54
Manipulation of Ploidy in Caenorhabditis elegans
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Cited by 8 •
2018
This method allows for the generation of tetraploid and triploid Caenorhabditis nematodes from any diploid strain. Polyploid strains generated by this method have been used to study chromosome interactions in meiotic prophase, and this method is useful for examining important basic questions in cell, developmental, evolutionary, and cancer biology.
07:03
Mouse Oocyte Microinjection, Maturation and Ploidy Assessment
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Cited by 75 •
2011
Oocytes are prone to aneuploidy due to errors in chromosome segregation during meiotic maturation. Aneuploid eggs can cause infertility, miscarriages or developmental disorders like Down syndrome. Here, we describe methods to introduce materials of choice into oocytes and methods to study meiotic maturation and assess ploidy.
08:41
Isolation of Cardiomyocytes from Fixed Hearts for Immunocytochemistry and Ploidy Analysis
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Cited by 11 •
2020
The goal of this work is to develop a method to reproducibly isolate cardiomyocytes from the adult heart and measure DNA content and nucleation.
11:19
Ploidy Manipulation of Zebrafish Embryos with Heat Shock 2 Treatment
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Cited by 11 •
2016
A modified protocol for ploidy manipulation uses a heat shock to induce a one-cycle stall in cytokinesis in the early embryo. This protocol is demonstrated in the zebrafish but may be applicable to other species.
08:44
A High-Throughput In Situ Method for Estimation of Hepatocyte Nuclear Ploidy in Mice
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Cited by 1 •
2020
We present a robust, cost-effective, and flexible method for measuring changes in hepatocyte number and nuclear ploidy within fixed/cryopreserved tissue samples that does not require flow cytometry. Our approach provides a powerful sample-wide signature of liver cytology ideal for tracking the progression of liver injury and disease.
FAQs
DNA-binding dyes make genome copy number measurable by producing a signal that tracks cellular DNA content. In flow cytometry, that signal supports separation of cells with different DNA amounts, while fluorescence microscopy can help visualize chromosome-related patterns. The resulting measurements can distinguish expected ploidy states from abnormal copy-number conditions when the assay is interpreted carefully.
These approaches provide complementary evidence. DNA-content measurement estimates genome copy number through a dye-derived signal, whereas chromosome counting examines chromosome number directly. Using both perspectives can help characterize whether an observed result reflects a whole-genome state or a chromosome-number abnormality. This distinction is relevant when evaluating genome stability, cultured cells, or manipulated genomes.
Identifying these states adds information beyond a simple cell or organism description: it reveals whether chromosome content has changed through an altered number of complete sets or through an abnormal chromosome-number pattern. That distinction helps connect measurements with genome stability, genetic disorders, cancer research, plant breeding, and evolutionary change.
Ploidy determination can be approached by measuring DNA content with flow cytometry, examining chromosome patterns with fluorescence microscopy, or counting chromosomes. DNA-binding dyes are relevant to signal-based measurements. Together, these options provide different readouts for studies of cells, organisms, cell cultures, hybrid organisms, and genome manipulation, depending on the chromosome or DNA information being investigated.
Within biology, the analysis can be applied across cell division, development, reproduction, and genome stability studies. It can reveal whether chromosome-content patterns remain consistent as cells or organisms change or whether abnormal states emerge. This makes the measurement useful for characterizing cell cultures and for investigating how genome copy number relates to developmental or reproductive biology.
Plant breeding and hybrid-organism research benefit from measurements that characterize chromosome content. Ploidy determination can help describe the genomic state of breeding materials or hybrids, while genome-manipulation studies can use the same information to assess resulting chromosome content. In evolutionary research, these observations contribute to analysis of genome change and connect chromosome-level measurements with broader biological questions.