Studies On Strain Performance Test And Seed Propagation System Building In Artemisia Annua L.

Eight breeding lines of Artemisia annua L. derived from family JS, CQ, CS andGX through recurrent selection were used in strain performance test, and seedpropagation system has also been studied in this research. The main results are asfollows:Family GX and CQ have great height, family CS has middle height, family JShas the lowest height. Family GX and JS have bigger stem girth and knot spacing,family CS has the middle stem girth and minimal knot spacing, family CQ hasminimal stem girth and middle knot spacing. Family CS and GX have bigger includedangle than that of family JS and CQ have. Family CS has most ramification numbers,the next is family CQ and GX, the last one is family JS. The plants of family JS andCQ are compact; the leaf type of former is mainly narrow-tightness small-leaf type,while the latter is mainly narrow-tightness big-leaf type. The plants of family CS andGX are loose, the leaf type of former is mainly broad-tightness small-leaf type, andthe latter is mainly broad-tightness big-leaf type.Artemisinin colony content based on the origin varies. Family CS has the highestartemisinin colony content and little CV in four families of Artemisia annua L., theyare 0.921% and 10.5%. Family JS has high artemisinin colony content and the highestCV, they are 0.921% and 21.3%. Family GX has the content of 0.811% and the lowestCV of 8.9%. Family CQ has the lowest content of 0.797% and CV of 12.6%. Theartemisinin colony content of different families is high and steady. Family GX has thehighest leaf yield, family CQ takes second place, family CS and JS have lower leafyield. Family CS has the highest artemisinin yield which can obtains 1.580 kg per667m~2, the next is family GX which can obtains 1.567 kg per 667m~2, family JS andCQ have lower yield which can obtain 1.477 kg per 667m~2 and 1.368 kg per 667m~2.By recurrent selection, high-quality individuals were selected every year, thepercentage of high artemisinin content plant increase year by yaear, so does theaverage artemisinin content of Artemisia annua L. breeding lines, from 0.778% to0.862%, the CV drop a little. Artemisinin colony content, which arrives at 1%remarkable level of different breeding lines, has obvious difference. Breeding line ofArtemisia annua L. has variance coefficient ranging from 5.80% to 17.34%. 4excellent breeding lines are gained by selection in 2006, they are lines of 06001(JS,1.021%), 06011(CS, 0.960%), 06008(CS, 0.923%) and 06002(JS, 0.892%). Theselines have higher artemisinin colony content and small variance coefficient than others.In view of seed yielding, the best sowing date is before May 10 every year. It issafe sowing date for the seed germinating and maturating between May 10 and June 5.June 5 is the critical date for the sowing of Artemisia annua L. because in summer,the seeds can't maturate after this date. The ratio of seedbed area and plant productionfield area is more than 1:6000. It can provide the needs of 300～500 acre's seedlingwhen sowed lkg seeds per 667m~2.