| 摘要: |
| 以“中国春”、“阿勃”等９个小麦的１Ａ、２Ｂ、３Ａ、４Ａ、５Ｂ和７Ｄ６个单体系为材料，将９个不同遗传背景的６个单体系分别自交，后代大群体筛选缺体株，并连续自交定向选择，进行染色体缺失遗传背景效应分析。结果表明，无论是同一遗传背景下的不同单体系间，或是不同遗传背景的同一单体系间，单体自交后代缺体出现的频率、缺体育性，以及缺体自交后代稳定性等方面均存在明显差异。在“阿勃”背景下未能获得２Ａ和７Ｄ可育氛体系，在“扬麦１号”背景下获得２Ｂ和７Ｄ可育缺体系，在“Ｓａｖａ”背景下获得７Ｄ可育缺体系。此外，还获得比“阿勃”１Ａ缺体生活力和稳定性更好的“丰抗１３号”１Ａ缺体系。 |
| 关键词: 小麦缺体，单体自交，染色体缺失，遗传背景效应 |
| DOI： |
| 分类号:S512.103 |
| 基金项目:农业部“八五”攻关课题,陕西省科委资助课题 |
|
| Effects of Different Wheat Genetic Backgrounds on Chromosome Deficiency |
|
|
| Abstract: |
| Deficiency effects of chromosome 1A,2B,3A,5B and 7D in nine common wheat genetic backgrounds,Chinese Spring,Abbondanza,Jinghong No.1,FengkangNo.13, Sumai No. 3.Yangmai No. 1,Zhong 7902, sava and Rescue,were studied withmonosomic selfing 1A,2B,3A,5B,7D of these nine genetic backgrounds for selectingnullisomic plants in large population,and then with continuous selfing nullisomic plantsfor orthoselection. The results showed that the appearance frequencies,fertilities andstabilities of nullisomics were different in different chromosome deficiences of the samegenetic background and in different genetic backgrounds of the same chromosome deficiency. In Abbondanza genetic background nullisomic lines 2A and 7D were not abtained ,while in Yangmai No. 1 2B and 7D obtained;in Sava 7D obtained;in addition, inFenfkang No. 13 1A obtained which was also more vigorous and stable ghan 1A in Abbondanza. |
| Key words: wheat nullisomic,monosomic selfing,chromosome deficiency,effect of genetic background |
