The results of in vitro mutagenesis breeding in chrysanthemum

In Vietnam, recent years only, mutation breeding has been applied successfully for ornamental crops and decorative crops. In the past, the number of vegetative propagated crops and flower plant induced through mutagenesis was limited due to the various reasons such as the limitation of multiplication system after mutagenesis or little attention of scientists and researchers and so on. Furthermore, in vegetative crops like chrysanthemum, chimerical appearance after irradiation often cause difficult problems in breeding. Therefore, mutagenesis technique combined with in-vitro culture was effectively applied for vegetative crops breeding. Especially, in chrysanthemum thanks to the extremely ability to speed up multiplication a huge number of explants in the short time. Moreover, it can be shorten the breeding cycle. Under sponsor of IAEA/VIE/5014 (period 2003-2007) project, we carried out research on in vitro mutagenesis treatment to diverse the flower colour and structure of chrysanthemum. Several beautiful colour mutant lines of chrysanthemum have been developed by our group through mutagenesis induction on callus. There was not segregation at two mutant lines of strong yellow and pink. They are the promising new lines. Those should be evaluated as new varieties in the near future by scientific council, Ministry of Agriculture and Rural Development, Vietnam. Up to now, the promising new lines developing and giving high economical effect in large area in provinces as Hanoi, Hatay, Bacninh, Hungyen, Haiduong. (author)