Vandaceous orchids have been bred extensively over the last few decades, and today there are over 120 hybrid genera under cultivation throughout the world (Hegde and Sinha, 2002). Such an extensive breeding at multigeneric level in this diverse group with over 75 genera and 900 species has been possible mainly because of homologies present in the genomes with comparatively uniform chromosome numbers present in most of the species/ genera and their interfertility (Vij and Shekhar, 1986).