Controlled crosses were done by using the mandarins 'Clementine' and 'Sunki
', the 'Rangpur' lime and the 'Volkamer' lemon as female parents with none,
low, low to moderate and moderate polyembryony degrees, respectively, and
Poncirus trifoliata and its hybrids as male parents for its easily recogniz
able trifoliate characteristic. The hybrid frequencies were 57.4%, 53.6%, 1
8.6% and 14.2% for 'Clementine', 'Sunki','Rangpur' and 'Volkamer', respecti
vely. It was also observed a negative association between polyembryony degr
ee and hybrids frequency.