Development of Trait-Specific SSR Primers: A Step-by-Step Guide
(A practical guide for research students)
PB Kale, Molecular Biology and Biotechnology, Mahatma Phule Krishi Vidyapeeth Rahuri
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
