| 摘要: |
| 以PTS和常规品种(系)小偃6号、西农8727、小偃22、陕229、陕7859、周麦ll等互为父母本进行杂交，分期播种F1和F2，田间考察自交结实率和育性分离情况。结果表明：F1正反交组合的结实率不受细胞质影响，说明PTS系的育性遗传为核基因控制。同时，F2代育性变化是一个连续的过程，以结实率70％为界划分可育与不育及半不育时，出现3：l的分离比，因此认为PTS系的不育表达是一主效隐性基因和多个微效(修饰)基因共同作用的结果。 |
| 关键词: 普通小麦 光温敏雄性不育 遗传分析 |
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| Genetic analysis of photo-thermo partially sensitive male sterile lines of PTS wheat |
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| Abstract: |
| Photo-thermo partially sensitive male sterile wheat line PTS was recipro cally crossed with 13 wheat varities,selfed seed fertility (%) of F1 hybrids and segregation ratio of the fertile and sterile plants in F2 generation of 5 crossed were observed There sult showed that fertility of F1 gene ration is not affected by maternal parents.F2 generation gave sterile,part-sterile and fertile plants and the fertility change was successive.It seemed that sterility was controlled by nucleusal logenes.If fertility of 70% was takenas the demarcation line between sterile and fertile plants,the ratio of fertile to sterile would be 3∶1.So it could be indicated that themale sterility might becontrolled by anumbers of microeffective modification genes, and their founctions was similar to a major gene. |
| Key words: wheat photo-thermo sensitive genetic analysis |
