ianyang seedless Dahong orange was selected from the sprouts of Dahong or-ange trees P1 and P2 after the heavy freese in 1982.Their clones are geneticallty stable andseedless or almost seedless, while common Dahong orange is polyspernous. Their fruit quali-ties are better than that of common Dahong orange。The morphological character, yield fac-tors,fruit qualities and reduction division of pollen mather cells have been studied in details。Their seedlessness is stable and the chief causes of seedlessness is pollen abortion due...
