盾葉薯蕷有性繁殖的研究

食品科學論文編號:SP043  論文字數:8013,頁數:18   附開題報告,任務書

目    錄

1前言 5
2 材料與方法 6
2.1 試驗材料 6
2.2試驗方案 6
2.2.1 有性繁殖材料的種植 6
2.2.2 不同播種方式種子發芽試驗 6
2.2.3 不同播期的出苗試驗 7
2.3 測定項目與方法 7
2.3.1田間記載 7
2.3.2田間取樣 7
2.3.3根莖重量 7
2.3.4皂素含量 7
2.4 計算方法 7
2.4.1 發芽率測定方法 7
2.4.2 皂素含量的計算 7
2.4.3 含水量的計算 8
3 結果與分析 8
3.1 盾葉薯蕷有性繁殖的生物學特性 8
3.1.1 不同播種方式下盾葉薯蕷種子發芽的比較 9
3.1.2 不同播期與出苗的關系 9
3.1.3 有性繁殖方式生育期 9
3.1.4 有性繁殖方式的生長形態 10
3.1.5 盾葉薯蕷有性繁殖植株開花習性的觀察 10
3.2 盾葉薯蕷有性繁殖根狀莖產量和皂素含量的測定 11
3.2.1 一年生有性繁殖不同單株的根莖產量和皂素含量 11
3.2.2 不同年限的有性繁殖植株的根莖產量和皂素含量的比較 12
3.2.3 有性繁殖植株與母株的關系 12
3.2.4 根莖含水量與產量和皂素含量的關系 13
4討論與小結 14
4.1 關于盾葉薯蕷有性繁殖利用的問題 14
4.2 關于有性繁殖與無性繁殖結合在育種中利用前景的問題 15
4.3 關于種子發芽率的問題 15
4.4 關于根莖含水量與皂素含量關系的問題 16
5參 考 文 獻 16

摘要：對盾葉薯蕷的有性繁殖在不同播種方式、不同播種期的種子發芽率、開花習性及生長發育等生物學特性進行了觀察，另對有性繁殖的根莖產量和皂素含量進行測定，分析了實驗數據，得出有性繁殖后代的分離比較嚴重，三年生有性繁殖植株其各項指標均要比一年生和二年生的要高，尤其是皂素含量高達2.60%。故有性繁殖為盾葉薯蕷育種提供了十分豐富的遺傳變異材料，便于我們從中篩選出有優良目標性狀的單株，在生產上，盾葉薯蕷有性繁殖三年生植株的經濟效益最高。     
關鍵詞：盾葉薯蕷；有性繁殖；皂素含量

 Abstract：Dioscorea on sexual reproduction at different sowing methods, different sowing the seed germination rate, flowering and growth habits and other biological characteristics were observed. The highest germination rate environment in the Petri dish, seed germination rate in mid-April the highest annual Dioscorea plant sexual reproduction than thin, it is recommended after emergence fertilizer to promote growth of the ground area, thus speeding up the sexual Reproduction of dry matter and saponin accumulation. Another root of the sexual reproduction of measured yield and saponin content, analysis of experimental data, obtained the separation of sexual reproduction is quite serious, with three years in plant sexual reproduction than its index of annual and biennial to be higher , in particular, up to 2.60% saponin content. Therefore, sexual reproduction for the breeding of Dioscorea provides a very rich material of genetic variation, for us to have fine goal from selected plant traits, in production, sexual reproduction of Dioscorea economic benefits of the highest three-year old plants.
 Key words: Dioscrea zingiberensis C.H.Wright；Sexual propagation；Diosgenin content