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In this study, the application of Recurrent Selection After selecting the best of Artemisia annua JS, CQ, CS, GX 8 lines of the four systems (breeding lines) strain comparison test, and seed multiplication system were studied to obtain the following results: GX, CQ system tall plants, followed by CS, JS dwarf; GX the JS system of coarse stems, long section spacing, followed by CS, section spacing short CQ stems finest, section spacing medium; CS and GX system stems angle larger, smaller angle between JS and CQ system; largest number of branches of the CS system, CQ and GX system, followed by JS system at least; the JS system and CQ system compact plant, former leaves a narrow cleft close lobular type, which is mostly narrow cleft close leaf, plant type CS system and GX system is more loose, the former leaves wide fissure close lobular type, which mostly wide cleft close big-leaf type. Four systems of Artemisia annua, the CS system artemisinin groups highest content of up to 0.921%, coefficient of variation is small, as 10.5%; JS system, followed by 0.912%, the coefficient of variation is 21.3%; GX The system group content was 0.811%, the smallest coefficient of variation for 8.9%; slightly lower content of CQ system as 0.797%, the coefficient of variation was 12.6%, the artemisinin group content of each system is comparatively higher and more stable. Dry leaf yield the highest GX the CQ system followed, CS and JS system low. Artemisinin production to the highest of the CS system, 1.580 kg/667m 2; GX system followed by 1.567 kg/667m to 2; the JS system and CQ lower, namely 1.477 kg/667m ~ 2 and from 1.368 kg/667m to 2. Yearly select the proportion of high concentration and a higher content in the whole plant has increased year by year, the average content of the breeding lines increased year by year and stability, increased from 0.778% to 0.862%, the coefficient of variation decreased. Among breeding lines, the content of artemisinin groups large difference was significant at the 1% level, breeding lines within a certain range of variation, ranging from 5.80% to 17.34%. 2006 obtained by select optimum strains: 06001 (JS, 1.021%) 06011 Main line (CS, 0.960%), 06008 (CS, 0.923%), 06002 (JS, 0.892%), these lines with respect to the other The strains have a higher population mean the content of the coefficient of variation is smaller. From the point of view of seed production,, Artemisia annua optimal sowing prior to May 10, planting the sooner the higher the yield of the seed, winter planting material plants highest seed yield. Between May 10 to June 5, Artemisia annua seeds sown rhythm, June 5 annua seed sowing critical period, after Artemisia annua seed can not mature. Normal planting Artemisia annua seed breeding fields and production fields ratio of 1:6000, 1 mu seedbed planting 1kg Artemisia annua seeds to meet the 300 to 500 acres of production fields with seedlings, the seedbed area and production area ratio : 300 ~ 500.
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