Development of Trait-Specific SSR Primers: A Step-by-Step Guide
(A practical guide for research students)
[by Dr. PB Kale]
Simple Sequence Repeats (SSRs), also known as microsatellites, are short tandem repeats of 1–6 nucleotides widely distributed across genomes. Because of their high polymorphism, co-dominant inheritance, and reproducibility, SSR markers remain valuable tools in genetic diversity studies, QTL mapping, and marker-assisted selection. In many postgraduate research projects, particularly in plant biotechnology and molecular breeding, students develop trait-specific SSR primers based on genes associated with target traits such as drought tolerance, heat stress, disease resistance, or nutritional quality.
The following
step-by-step guide outlines the general workflow used in research
laboratories to develop gene-based SSR markers using sequence databases and
bioinformatics tools.
1. Identify Candidate Genes Associated with the Trait
