论文部分内容阅读
应用程氏指数法研究了不同类型杂交组合。结果表明：粳×籼Ｆ１为偏籼型，Ｆ２呈正态分布，大部分为籼粳中间型。粳×爪Ｆ１为偏粳型， Ｆ２为偏粳型和粳型。粳×粳Ｆ１与Ｆ２均为粳型。程氏指数法叶毛、稃毛、 穗壳色、ｉ～２穗节长、籽粒长宽比、酚反应６个分类性状间相关密切，对总分均有较大贡献，适于分析籼粳交Ｆ２以后各世代。粳×籼Ｆ２代各性状的分离除酚反应为双峰曲线外，其它５个性状均呈单峰曲线分布；除穗节长性状具有超亲现象外，其它５个性状均介于双亲之间，为部分显性。抽穗期与亲本及Ｆ１程氏指数呈极显著的负相关，结实率与Ｆ２程氏指数呈极显著的负相关。
Application of the index method to study different types of hybrid combinations. The results showed that japonica × indica F1 was a type of indica rice, F2 was normally distributed, most of them were indica - japonica type. Japonica × claw F1 was japonica-japonica, F2 was japonica-japonica and japonica-japonica. Japonica × japonica F1 and F2 are japonica. Cheng’s index method leaf hair, hairy, panicle color, i ~ 2 spike length, grain length and width ratio, phenol reaction 6 classification closely related, have a greater contribution to the total score, suitable for analysis indica japonica After each generation of F2. The results showed that all the five traits showed a unimodal curve distribution except for the bimodal curve except for the phenotypic variation of the spikelet length. The other five traits were between the parents , Partly dominant. The heading date had extremely significant negative correlation with F1 and Cheng’s index, and the seed setting rate had a significant negative correlation with F2 Cheng’s index.