| 1. | The study on winter spike initiation in shenyang
沈阳地区冬小麦幼穗分化规律研究 |
| 2. | Genetic analysis of young spike development of multispikelet wheat new line
1幼穗发育遗传分析 |
| 3. | Correlation analysis of the tillering of winter wheat and the seeding time
冬小麦幼穗分化与播期的相关性分析 |
| 4. | Effects of daylength and temperature on the spike differentiation of winter wheat
光温生态因子对冬小麦幼穗分化的影响研究 |
| 5. | Studies on young panicle differentiation and phenotype diagn oses of barley
大麦不同品种不同播期幼穗分化时期形态诊断研究 |
| 6. | Effects of sowing times on the spike differentiation of different wheat varieties under the climate of warm winter
暖冬条件下播期对不同类型小麦幼穗分化的影响 |
| 7. | Effect of applying fertilizer at young panicle differentiation period on rice cultivated by seedling - broadcast with no - tillage
免耕抛秧稻幼穗分化肥施用效果试验 |
| 8. | Relation between young spike differentiation of ecotypes of wheat at different sowing date in spring and temperature and leaf emergence
不同生态型小麦春播条件下幼穗分化进程与温度和叶片出生的关系 |
| 9. | Referring to the achievements of conservation tillage on dry land farming , there is a series of work to be done to develop new tillage techniques to adapt to double cropping system of wheat and maize in shandong province . such work includes controlling the combine traveling along the line , return the stalk to the field after chopped , subsoiling being done in maize ' s growing stage . the advantage of subsoiling is to make the soil inter placed with soft and hard strips , which is good for decreasing runoff and vaporizing , and retaining rain
1 、保护性耕作条件下，普通小麦条播机的播种质量较差，小麦的田间出苗率比传统耕作低9 . 3 ；保护性耕作小麦冬前地上部分的生长状况也较传统耕作小麦差；由于根系的生长条件较为优越，保护性耕作的小麦的根系生长旺盛、分布广，越冬后有利于小麦的地上部分生长，大量发生春季分蘖和次生根，幼穗强烈分化，表现出较传统耕作小麦强的生长优势，产量提高6左右。 |
| 10. | Studies on transformation of indica rice with bt - toxin gene mediated by agrobacterium tumefaciens precultured immature embryo and callus derived from young panicle , immature embryo and mature embryo were used as acceptor for genetic transformation mediated by agrobacterium tumefaciens , the transformation rate of the above acceptor was investigated respectively . the results showed that immature embryo after precultured for 4 ~ 6d was the best . in respect to the concentration of agrobacterium tumefaciens when calli were cotransformated in medium yeb , to agrobacterium tumefaciens eha 105 , od value of 0 . 8 was the best
采用农杆菌介导法将bt毒蛋白基因导入水稻同样以上述两种籼稻为主要研究材料，比较了分别以预培养的幼胚和幼穗、幼胚、成熟胚来源的愈伤组织作为转化受体的愈伤组织转化频率，结果表明预培养4 6天的幼胚最适宜作为农杆菌介导转化的受体；其次是来源于幼胚和成熟胚的生长状态良好的胚性愈伤组织。 |
