Chemical Variability of Peel and Leaf Essential Oils in the Citrus Subgenus Papeda (Swingle) and Few Relatives

The Papeda Citrus subgenus includes several species belonging to two genetically distinct groups, containing mostly little-exploited wild forms of citrus. However, little is known about the potentially large and novel aromatic diversity contained in these citruses. In this study, we characterized compared essential oils obtained from peels leaves representatives both three related hybrids. Using a combination GC, GC-MS, 13C-NMR spectrometry, identified total 60 compounds peel (PO), 76 leaf (LO). Limonene was major component almost all citrus PO, except for C. micrantha hystrix, where ?-pinene dominated (around 35%). LO composition more variable, with different among samples, pairs: micrantha/C. hystrix accessions ichangensis. hybrid relatives, profiles were largely consistent their Citrus/Papeda parental lineage. This high chemical diversity, not only sections Papeda, but also between even at intraspecific level, suggests that may be an important source aroma future experimental crosses field crop species.