In order to clarify inheritance mechanism of fertility restoration for cytoplasmic male sterility （CMS） in a new Gossypium barbadense restorer line Hai R which was found in the fertility test crossing of G. hirsutum...In order to clarify inheritance mechanism of fertility restoration for cytoplasmic male sterility （CMS） in a new Gossypium barbadense restorer line Hai R which was found in the fertility test crossing of G. hirsutum CMS lines with G. barbadense germplasms. 23 fertility segregation populations of F2 and backcross were used to analyze the inheritance of fertility restoring gene（s） of Hai R. The result showed that Hai R had one major dominant gene （RfB） to control the CMS fertility restoration and this fertility restoration gene functioned at the sporophytic level. The sterile cytoplasm background might not only influence the transmission rate of male gamete but also that of female gamete when the restorer gene was recessive. It could be deduced that this fertility restoration gene might come from G. harknessii cotton, Hai R is of value in the application of cotton interspecific hybrid breeding.展开更多
赤峰显性核不育谷子是在谷子中首次发现的核不育材料,该材料的育性受2对核显性基因互作控制,一对是显性核不育基因Msch,另一对是显性上位育性恢复基因Rf。两者共同存在时显性上位育性恢复基因Rf能抑制显性核不育基因Msch的表达,从而表...赤峰显性核不育谷子是在谷子中首次发现的核不育材料,该材料的育性受2对核显性基因互作控制,一对是显性核不育基因Msch,另一对是显性上位育性恢复基因Rf。两者共同存在时显性上位育性恢复基因Rf能抑制显性核不育基因Msch的表达,从而表现可育。利用已构建的不育基因Msch的上位育性恢复基因Rf的近等基因系(NILs)为材料,通过对300对AFLP引物组合进行筛选,找到了与显性上位育性恢复基因Rf紧密连锁的2个AFLP标记(E15/M52和E20/M41),与不育基因的遗传距离分别是7.0c M和12.7 c M,而且位于不育基因的同一侧,标记间相距5.7 c M。展开更多
Bulked segregant analysis was employed to construct two mixed DNA pools to screen the RAPd marker linked with the fertilityrestoring gene（\%Rf\-i）\% of upland cotton. A total of 425 arbitrary 10mer oligonucleotide p...Bulked segregant analysis was employed to construct two mixed DNA pools to screen the RAPd marker linked with the fertilityrestoring gene（\%Rf\-i）\% of upland cotton. A total of 425 arbitrary 10mer oligonucleotide primers were screened on two DNA pools, bulked male fertile and sterile DNAs isolated from BC\-3 segregating population of （06132R×Simian No. 3）. Three primers produced repeatable polymorphisms between the paired bulks and their parents. DNA was extracted and amplified with these three primers for 92 plants of （Zhong 12A1×06132R）F\-2. Based on the male fertility scoring and RAPD amplification, it is found that one RAPD marker fragment designated OPV15 300 was linked with the fertilityrestoring gene （R f \-1） with a recombination value of 13.0±2.57%.展开更多
基金supported by the National Basic Research Program of China (973 Program,2004CB11730502)the Natural Science Foundation of Zhejiang Province, China (Y306093)ZhejiangTechnology Program, China (2008C22087)
文摘In order to clarify inheritance mechanism of fertility restoration for cytoplasmic male sterility （CMS） in a new Gossypium barbadense restorer line Hai R which was found in the fertility test crossing of G. hirsutum CMS lines with G. barbadense germplasms. 23 fertility segregation populations of F2 and backcross were used to analyze the inheritance of fertility restoring gene（s） of Hai R. The result showed that Hai R had one major dominant gene （RfB） to control the CMS fertility restoration and this fertility restoration gene functioned at the sporophytic level. The sterile cytoplasm background might not only influence the transmission rate of male gamete but also that of female gamete when the restorer gene was recessive. It could be deduced that this fertility restoration gene might come from G. harknessii cotton, Hai R is of value in the application of cotton interspecific hybrid breeding.
文摘赤峰显性核不育谷子是在谷子中首次发现的核不育材料,该材料的育性受2对核显性基因互作控制,一对是显性核不育基因Msch,另一对是显性上位育性恢复基因Rf。两者共同存在时显性上位育性恢复基因Rf能抑制显性核不育基因Msch的表达,从而表现可育。利用已构建的不育基因Msch的上位育性恢复基因Rf的近等基因系(NILs)为材料,通过对300对AFLP引物组合进行筛选,找到了与显性上位育性恢复基因Rf紧密连锁的2个AFLP标记(E15/M52和E20/M41),与不育基因的遗传距离分别是7.0c M和12.7 c M,而且位于不育基因的同一侧,标记间相距5.7 c M。
文摘Bulked segregant analysis was employed to construct two mixed DNA pools to screen the RAPd marker linked with the fertilityrestoring gene（\%Rf\-i）\% of upland cotton. A total of 425 arbitrary 10mer oligonucleotide primers were screened on two DNA pools, bulked male fertile and sterile DNAs isolated from BC\-3 segregating population of （06132R×Simian No. 3）. Three primers produced repeatable polymorphisms between the paired bulks and their parents. DNA was extracted and amplified with these three primers for 92 plants of （Zhong 12A1×06132R）F\-2. Based on the male fertility scoring and RAPD amplification, it is found that one RAPD marker fragment designated OPV15 300 was linked with the fertilityrestoring gene （R f \-1） with a recombination value of 13.0±2.57%.
