水稻杂种F1结实率与亲本程氏指数差异和同工酶遗传距离的关系及其预测研究

The Relationship of the Fertility of F1 Hybrid Rice with Cheng's Index Difference and Isozyme Genetic Distance

摘要:

以4个籼粳测验种做母本按NCII(4×90)设计配置的360个杂交F₁组合为材料,研究亲本的程氏指数差异(ID)、同工酶遗传距离(GD)与杂种F₁结实率的关系。结果显示:ID、GD与杂种F₁结实率呈极显著负相关(r=-0.540,p<0.01;r=-0.316,p<0.01),但决定系数不高,分别是0.2916、0.0999。ID、GD与F₁结实率的相关性受父本和母本影响,其中对非广亲和品种测交F1结实率的预测效果较好,对广亲和品种及南京11的测交F₁的预测则无效。因此,在利用ID和GD对水稻杂种F₁结实率进行预测时,宜在一定的亲本类型之间进行,ID比GD的预测效果更好。

Abstract:

Three hundred and sixty hybrid F1s from 4 indica (IR36 and Nanjing 11) and japonica (Balila andAkihikara) rice as female parents crossed with the rest male parents were used to study the spikelet fertility inrelation to Cheng's index difference (ID) and to isozyme genetic distance (GD). The results showed that ID and GD significantly negatively correlated with F1 spikelet fertility (r=-0.540, p<0.01; r=-0.316, p<0.01), but thedeterminative coefficient was low, which was 0.2916, 0.0999, respectively.