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A PCR-based Genotyping Method to Distinguish Between Wild-type and Ornamental Varieties of Imperata cylindrica

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An analytical toolkit for polyploid willow discrimination.

Wei Guo¹, Jing Hou¹, Tongming Yin¹

¹Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China.

Scientific Reports

|December 10, 2016

Summary

This study introduces a new toolkit for identifying polyploid willows using molecular markers and flow cytometry (FCM). This method efficiently distinguishes polyploid willows, aiding in the development of elite willow cultivars.

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Area of Science:

Plant science
Genetics
Biotechnology

Background:

Polyploid breeding is crucial for developing superior willow (Salix) cultivars.
Accurate identification of polyploid individuals in natural stands is essential for breeding programs.

Purpose of the Study:

To develop and validate an analytical toolkit for identifying polyploid willows.
To combine molecular markers and flow cytometry (FCM) for efficient ploidy level determination.

Main Methods:

Selected 10 single-copy, fully informative SSR markers based on segregation and mutability tests.
Applied marker-aided selection for polyploid identification in four Salix species (two tree, two shrub).
Confirmed ploidy levels using flow cytometry (FCM).

Main Results:

The developed toolkit demonstrated consistency between marker-aided selection and FCM results.
Tree willows were predominantly tetraploid, while shrub willows were mostly diploid.
The toolkit enables rapid screening of large natural stands for polyploids.

Conclusions:

The combined molecular marker and FCM toolkit provides an efficient and accurate method for polyploid willow identification.
This approach significantly enhances the efficiency of polyploid breeding programs for willows.
The findings offer insights into the ploidy distribution within different willow species.