The Comparative Study of the Cytoplasm Effect Between Ae. Uniaristata and Ae.Kotschyi CMS Line

Ae. Uniaristata cytoplasm wheat male sterile (CMS) 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 respectively. The agronomy characters, fertility restoration and maintaining relationship, as well as haploid frequency of the F 1 hybrids and their parents were investigated. The results indicated: ① Compared with A type and K type cytoplasm, U type cytoplasm had no significant negative effect on agronomicy characters. ② U type cytoplasm hybrid had higher germination rate than that of K type cytoplasm. ③ U type cytoplasm probably had stronger resistante to powdery mildew than the K type cytoplasm.④ The relationship of restoration and maintaining to that of Ae. Uniaristata CMS line almost was identical to that of (K type)Ae. Kotschyi CMS line, but some difference still existed between the two types of CMS lines. The fertility restoration of U type CMS line was more difficult and easily affected by the factors of climate. ⑤ U type cytoplasm caused higher haploid frequency than K type. the interaction between nuclei and cytoplasm was significant.