Breeding of new Artemisia annua variety "Kehao No.1" / 中国中药杂志

As a natural plant source of artemisinin,a first-line drug against malaria,Artemisia annua directly affects the extraction process of artemisinin and the source of artemisinin. At present,traditional breeding methods combined with tissue culture are often used to breed high-yield artemisinin-containing new varieties of A. annua. However,the breeding method has the disadvantages of low efficiency and continuous selection. In this study,heavy ion beam irradiation technology was used to observe the specific germplasm resources of A. annua,and the morphological characteristics,agronomic traits and artemisinin content were used as indicators to observe the selection materials and materials. The cultivated new varieties were compared with trials and regional trials. In addition,the new variety of A. annua was identified by SRAP molecular marker technology. The results showed that the new variety of A. annua, " Kehao No.1",had an average yield of 235. 0 kg of dry leaf per mu,which was more than 20% higher than that of the control. Especially,the average artemisinin content was 2. 0%,which was 45% higher than that of the control,and the " Kehao No.1" has high anti-white powder disease,high-yield and high-quality new varieties. Therefore,mutagenic breeding of heavy ion beam irradiation can significantly improve the yield and artemisinin content of the " Kehao No. 1" and it has a good promotion value.

Overview on tissue culture, regeneration and gene transfornation to Artemisia annua L.

Artemisia annua L. a highly aromatic annual herb is a widely dispersed through out the temperate region containing the main active anti malaria compound artemisinin a sesquiterpene lactone. Because of low artemisinin level, unsuccessful chemical synthesis and slightly improvement of molecular breeding methods, biosynthesis of this valuable compound was noticed by using the tissue culture and Genetic Engineering in these years. The rate transformation could be varies with different factors like genotype, age, explant type and agrobacterium strain. The results recently was shown that explants in tissue cultures are very sensitive to kanamycin concentration and even it could be late shoot and root formation. Hairy root culture is another subject that is in these years was niticed as a alternative method by designing the new bioreactor for production if this secondrary metabolite