Related Experiment Video
Updated: Mar 31, 2026
Preparation of Meiotic Chromosome Spreads from Mouse Spermatocytes
Published on: November 22, 2017
A modified method for preparing meiotic chromosomes based on digesting pollen mother cells in suspension
Jiangbo Dang1, Qian Zhao1, Xing Yang1
1Southwest University, College of Horticulture and Landscape, No. 2 Tiansheng Road, Beibei District, Chongqing, 400715 China.
Background:
Meiotic chromosome preparation is a key step in plant meiotic research. Pollen mother cell (PMC) wall elimination is beneficial to cytogenetic experimental procedures. Without wall interference, these procedures are easier and more successful. In existing methods it is difficult to eliminate PMC walls completely and uniformly. In this paper, we present an improved method for digesting PMC walls, and one for providing massive chromosomal spreads on a slide for other cytogenetic experimental procedures.
Results:
Three plants were selected to exhibit the modified meiotic chromosome preparation method. PMCs were dispersed as single cells and incubated in a mixed enzyme solution (3 % cellulose + 0.3 % pectinase + 1 % snailase) for 1.5-2.5 h. In total, 28.28 % cells were lost during this process. There were 800-1900 spreads on every slide and no PMC wall interference was found on any of the slides. The spreads were also evenly distributed on the slides. More spreads were obtained when PMC and protoplast densities in the suspension were increased. All three plants' spreads were successfully used to locate a 5 s rDNA conserved sequence. The Nicotiana hybrid's spreads were successfully used to identify the hybrid's parental genome.
Conclusion:
This is an alternative method for meiotic chromosome preparation. Through this method, PMC walls can be completely and uniformly eliminated, and hundreds of spreads on every slide can be obtained. These spreads can be successfully used for DNA in situ hybridization.
Insights
This study introduces an improved method for plant meiotic chromosome preparation, effectively eliminating pollen mother cell walls for easier analysis. The technique yields abundant, uniformly distributed chromosomal spreads suitable for advanced cytogenetic applications like DNA in situ hybridization.
Area of Science:
- Plant cytogenetics
- Molecular biology
- Genetics
Background:
- Meiotic chromosome preparation is crucial for plant research.
- Pollen mother cell (PMC) wall elimination simplifies cytogenetic procedures.
- Existing methods struggle with complete and uniform PMC wall removal.
Purpose of the Study:
- To present an improved method for digesting PMC walls.
- To enable massive chromosomal spread generation on slides for cytogenetic analysis.
Main Methods:
- Dispersed PMCs were incubated in a mixed enzyme solution (3% cellulose, 0.3% pectinase, 1% snailase) for 1.5-2.5 hours.
- Optimized PMC and protoplast densities in suspension were used to increase spread yield.
Main Results:
- Achieved complete and uniform PMC wall elimination without interference.
- Generated 800-1900 evenly distributed chromosomal spreads per slide.
- Successfully utilized spreads for 5s rDNA sequence localization and parental genome identification in a Nicotiana hybrid.
Conclusions:
- The developed method offers an alternative for meiotic chromosome preparation.
- It enables complete PMC wall elimination and high-yield chromosomal spread production.
- The resulting spreads are suitable for DNA in situ hybridization applications.
