单芒与粘果山羊草细胞质小麦雄性不育系比较 Ⅰ.恢保关系及单倍体发生频率

A Comparasion of Wheat CMS Lines of Ae.Uniaristata and Ae.Kotschyi Cytoplasms Ⅰ.Restoring and Maintaining Relationship and Haploid Frequency

利用单芒山羊草细胞质雄性不育系Ｕ４０１、Ｕ４０２、Ｕ８５６７、Ｕ５１３，粘果山羊草细胞质雄性不育系Ｋ４０１、Ｋ４０２、Ｋ８５６７、Ｋ５１３，及其同型保持系Ａ４０１、Ａ４０２、Ａ８５６７、Ａ５１３与１０个普通小麦品系杂交，测定和比较其恢保关系和单倍体发生频率，结果表明，Ｕ型不育系与Ｋ型恢保关系基本一致，但也存在差异。Ｕ型不育系育性恢复较Ｋ型难，且更易受气候条件影响。Ｕ型不育系诱导单倍体频率较Ｋ型高。

Ae.Uniaristata cytoplasm wheat male sterile lines U401,U402,U8567,U513, Ae.Kotschyi CMS lines K401,K402,K8567,K513 and their maintainer lines A401,A402,A8567,A513 were crossed with 10 common wheat lines.The restoration and maintaining relationship and haploid frequency were determined.The result indicated that the relationship of restoration and maintaining of wheat CMS lines of Ae.Uniaristata cytoplasm was almost identical to that of K type CMS lines,though some differences exist between them.The fertility of U type CMS lines was more difficult to be restored.The U type cytoplasm caused slightly higher haploid frequency than K type.