They can also find application as biological control agents
(Qing and Shiping, 2000; Chanchaichaovivat et al., 2007)
and they include some of the most widely used model
organisms for genetics and cell biology. Recently, the
ability of yeast to convert sugar into ethanol has been
harnessed by the biotechnology industry for ethanol fuel
production (Oyeleke and Jibrin, 2009; Ocloo and Ayernor,
2010; Mohd et al., 2011). Thus, there is an exploration of
diverse sources of yeast to seek potent species that can
utilize a wide range of substrates. Kurtzman and Piskur
(2006) reported that yeasts do not form a specific
taxonomic or phylogenetic group and at present it is
estimated that only 1% of all yeast species have been
described