This book can be considered a microarray development protocol. It includes the whole procedure, a step by step detailed procedure, of how to develope a microarray to detect and identify complicated potyviruses under species and strain level. While the experiment design, author considered more than 10 factors that might affect the sensitivity and specificity of the microarray. Therefore the developed microarray showed higher specificity and sensitivity. This book is suitable not only for research purpose but also a good reference for university students.