DEVELOPMENT OF A SEEDLESS CITRUS CULTTVAR THROUGH BUD RE-IRRADIATION

摘要

Hong Jiang Cheng is an important sweet orange cultivar in the Guangdong Province of China. The fruit is of a very high quality, but it has too many seeds. The objective of this study was to induce a commercially seedless or less seedy cultivar in an effort to improve the fruit quality further through mutation breeding.rnIn January 1978 and 1987, mature autumn shoots were taken from the seedy adult trees of Hong Jiang Cheng and the shoot leaves stripped. The buds were irradiated with ~(60)Co gamma rays at a dose of 8 kR and at a dose rate of 250 R/min. In the winter of 1986 and in January 1988, the shoots taken from the once irradiated trees were re-irradiated at the same dose but at a dose rate of 230 R/min. After irradiation, all the treated buds were single bud grafted on to Hong Ning Meng (C. limonia Osbeck) rootstock.