盾叶薯蓣有性繁殖的研究

论文编号:SP043  论文字数:8013,页数:18   附开题报告,任务书

摘要：对盾叶薯蓣的有性繁殖在不同播种方式、不同播种期的种子发芽率、开花习性及生长发育等生物学特性进行了观察，另对有性繁殖的根茎产量和皂素含量进行测定，分析了实验数据，得出有性繁殖后代的分离比较严重，三年生有性繁殖植株其各项指标均要比一年生和二年生的要高，尤其是皂素含量高达2.60%。故有性繁殖为盾叶薯蓣育种提供了十分丰富的遗传变异材料，便于我们从中筛选出有优良目标性状的单株，在生产上，盾叶薯蓣有性繁殖三年生植株的经济效益最高。     
关键词：盾叶薯蓣；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
 

目    录

1前言 5
2 材料与方法 6
2.1 试验材料 6
2.2试验方案 6
2.2.1 有性繁殖材料的种植 6
2.2.2 不同播种方式种子发芽试验 6
2.2.3 不同播期的出苗试验 7
2.3 测定项目与方法 7
2.3.1田间记载 7
2.3.2田间取样 7
2.3.3根茎重量 7
2.3.4皂素含量 7
2.4 计算方法 7
2.4.1 发芽率测定方法 7
2.4.2 皂素含量的计算 7
2.4.3 含水量的计算 8
3 结果与分析 8
3.1 盾叶薯蓣有性繁殖的生物学特性 8
3.1.1 不同播种方式下盾叶薯蓣种子发芽的比较 9
3.1.2 不同播期与出苗的关系 9
3.1.3 有性繁殖方式生育期 9
3.1.4 有性繁殖方式的生长形态 10
3.1.5 盾叶薯蓣有性繁殖植株开花习性的观察 10
3.2 盾叶薯蓣有性繁殖根状茎产量和皂素含量的测定 11
3.2.1 一年生有性繁殖不同单株的根茎产量和皂素含量 11
3.2.2 不同年限的有性繁殖植株的根茎产量和皂素含量的比较 12
3.2.3 有性繁殖植株与母株的关系 12
3.2.4 根茎含水量与产量和皂素含量的关系 13
4讨论与小结 14
4.1 关于盾叶薯蓣有性繁殖利用的问题 14
4.2 关于有性繁殖与无性繁殖结合在育种中利用前景的问题 15
4.3 关于种子发芽率的问题 15
4.4 关于根茎含水量与皂素含量关系的问题 16
5参 考 文 献 16