Functional markers (FMs) are derived from polymorphic sites within genes causally involved in phenotypic trait variation (Andersen,
J.R. & T. Lübberstedt, 2003. Trends Plant Sci 8: 554–560). FM development requires allele sequences of functionally characterized
Development and application of functional markers in maize. Available from: https://www.researchgate.net/publication/225505614_Development_and_application_of_functional_markers_in_maize [accessed Jan 13, 2016].