| 摘要: |
| 本文研究了单交F2代、回交和三交F1代群体植株品质性状与亲本的相关性及杂种后代的分离与分布，结果表明：（1）在F2代，籽粒蛋白质、干、湿面筋含量和S．D．S沉淀值与高亲值、低亲值和中亲值呈显著或极显著正相关，而在回交F1代，上述籽粒品质性状与轮回亲本也呈正相关。在三交F1代．上述各品质性状与第三亲本的正相关系数比较大，说明欲在后代中出现较多的品质性状比较好的个体，亲本的品质应比较好，在三交组合中，尤其应注意第三亲本的选择；（2）在回交F1代群体，各品质性状的分布偏向于回交系本，在三交群体中则偏向于第三亲本。 |
| 关键词: 籽粒品质性状,亲子相关,分离 |
| DOI： |
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| 基金项目:国家自然科学基金!29170492,39370440 |
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| Abstract: |
| Studies on parent-offspring correlation and distribution of grain quality characters in single cross F2, back cross F1 and three-way cross F1 were carried out,the following results were obiained: (1) In F2 generation, grain quality characters including GPC,WPC, DPC and S. D. S SV were significantly or highly significantly correlated with that of their high-value parent, low-value parent and mid-parent. The grain quallty characters of backcross F1 were positively correlated with that of the recurrent parent, while correlation coefficients between the quality characters and that of the third parent were positively higher in F1 generation of the three-way cross. These indicated that if we expect more high quality plants in offspring, the quality characters of parents should be better, especially for the third parent in three - way cross. (2 ) The distribution of grain quality characters tended to the recurrent parent in back cross population, and tended to the third parent in three-way cross population. |
| Key words: grain quality characters,parent-offspring correlation,segregation |
