| 摘要: |
| 本文提出了标准差距离分组法并以中国和联邦德国4个不同生态环境,5个不同年份的5套试验资料研究用标准差距离分组法进行小麦杂种优势预测。结果表明:G:组(D2±1/2s)出现强优势组合最多,为43个,平均杂种优势最高,为60.4%;强优势组合出现的频率也最高,为57.3%。因而可以选择遗传距离(D2)大小为(m±1/28)的亲本进行杂交,这样有较大的把握和机会获得强优势组合。为应用遗传距离预测小麦杂种优势提供了一个量化指标。 |
| 关键词: 杂种优势 遗传距离 小麦 |
| DOI： |
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| 基金项目:国家教委博士点基金资助课题; “七五”攻关课题的一部分 |
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| Abstract: |
| Prediction of heterosis was studied by using the data from 5 experiments in 4 different ecological environments(Keshan;Helongjiang provi- nce;Taian,Shandong province;Hohenheim University,Stuttgart,West Germa- ny;Beijing)and in 5 different years(1979,1981,1987,1988,1989).The mainr esu- lts are as follows: A new method was devised to quantify the degree of genetic divergence be- tween different parents as expressed by values of genetic distance of quantita- tive character of parents.According to the experimen... |
| Key words: heterosis genetic distance wheat |
