摘要
以三种小麦胞质雄性不育系(Q型不育系、T型不育系和AL型不育系)与13个Q型胞质恢复系进行杂交,以花粉碘染率为指标,比较研究了不同恢复系对不同不育系的恢复度.研究发现,尽管Q型胞质恢复系本身育性正常,但它与Q型不育系杂交后所得F1代,育性有较大变幅,花粉碘染率0.177 7～0.774 7.有些恢复系如QR3、QR3-37、QR30207等对AL型不育系、恢复系QR2-143对T型不育系的恢复度(杂种花粉碘染率)较高,达0.85以上.在对供试恢复系对不同不育系的恢复度进行t检验后发现,这三种不育系在恢复程度上无显著差别,说明它们可能是同类不育系,或者可能是所涉及的恢复系具有广泛恢复能力.在上述三种类型不育系中,QA92-8的可恢复程度偏低,其原因可能是其核遗传背景不同.
There were three types of cytoplasmic male-sterile lines(Q-type,T-type,and AL-type A-lines)of common wheat used in crosses with 13 Q-type restoring lines(R-lines)with Q-type cytoplasm. The restoration scale of their hybrids were comparatively studied by means of the rate of dyed pollen grains in Ⅰ_2-KI solution. The results showed that,although the R-lines with Q-type cytoplasm had normal fertility,the hybrids of the R-lines as male parent with Q-type A-lines had the fertility with range of 0.177 7～0.774 7. Among them,some R-lines such as QR3,QR3-37 and QR30207 so on had high restoring scale(>0.85)to AL-type A-line. The R-line such as QR2-143 had high restoring scale(>0.85)to T-type A-line. The comparison(t test)of fertility restoration of the same R-lines to different types of A-lines,however,showed that the three types of A-lines had not got significant difference from each other in fertility restoration properties. Among the above three types of sterile lines,QA92-8 had lower fertility restoration than TA93-7 and AL93-7,which maybe caused by different nuclear genetic background.
出处
《广西植物》
CAS
CSCD
北大核心
2005年第1期62-65,共4页
Guihaia
基金
贵州省优秀人才基金(黔科教办(2001)3号)
关键词
杂交小麦
胞质雄性不育系
育性恢复
结实率
hybrid wheat
cytoplasm male sterility
fertility restoration
grain set
