| 摘要: |
| 1993～1995年用5个K型小麦不育系与7个恢复系进行不完整双列杂交,分析杂种粒重杂种优势的遗传特性。结果表明,K型杂交小麦的粒重遗传符合加性——显性模型,加性效应更为重要,高粒重属增效基因,对低粒重为部分显性。根据F2方差、遗传力、亲本增效基因携带、相关回归及杂种优势分析,母本对杂种的粒重起主导作用,存在明显的母本效应,随母本粒重的增加,出现正平均优势和正超亲优势组合频率增加。 |
| 关键词: 小麦，粒重遗传，杂种优势，母本效应 |
| DOI： |
| 分类号:S512.035.1 |
| 基金项目:国家“八五”攻关项目,国家自然科学基金资助项目 |
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| A Genetic Analysis of the Grain Weight of Ae.kotschyi Cytoplasm Hybrid Wheat |
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Liu Shudong Yan Cunyi Xi Yajun He Peiru,Liu Shudong Yan Cunyi Xi Yajun He Peiru,Liu Shudong Yan Cunyi Xi Yajun He Peiru
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| Abstract: |
| The genetic feature and heterosis of grain weight were analysed in 35 hybrid wheat crossed with 5 A-lines of Ae.kotschyi cytoplasm and 7 R-lines.The results indicated that the inheritance of weight of k-hybrid wheat was fit to addition-dominant genetic model,but additive effect was more important. Weighty grain gene was partially dominant to light grain gene.The analysis of variance in F2,heritability,numbers of dominant gene in parents,correlation,regression and heterosis indicated that the female parent was more important to grain weight of hybrids and there existed an obvious maternal effect.The frequence of the heterosis over the mid-parent or hi-parent was increased with the weight gain of female parent. |
| Key words: wheat,inheritance of grain weight,heterosis,maternal effect |
