摘要
The genetic linkage map has been constructed with 125 SSR markers based on BC1:2 population consisting of 322 lines derived from the combination of (CML270×478) ×CML270 in maize (Zea mays L.), covering 1939.0 cM of maize genome. The average mapping distance was about 15.5 cM. Three major QTLs of the relative resistant index of re- sistance to maize sheath blight (Rhizoctonia solani) had been located on chromosomes 1, 7 by composite interval mapping (CIM). 7 QTLs of the plant height have been located on chromosomes 3, 4, 5, 6. Five QTLs of ear height have been located on chromosomes 3, 4, 6. The resistance to the sheath blight is shown to be not relative to plant height and ear height genetically. Inbred line CML270 was used for mo- lecular assisted selection and cloning the genes.
The genetic linkage map has been constructed with 125 SSR markers based onBC_(1:) population consisting of 322 lines derived from the combination of (CML270 X478) XCML270 inmaize (Zea mays L.), covering 1939.? cM of maize genome. The average mapping distance was about 15.5cM. Three major QTLs of the relative resistant index of resistance to maize sheath blight(Rhizoctonia solani) had been located on chromosomes 1, 7 by composite interval mapping (CIM). 7QTLs of the plant height have been located on chromosomes 3, 4, 5, 6. Five QTLs of ear height havebeen located on chromosomes 3, 4, 6. The resistance to the sheath Might is shown to be not relativeto plant height and ear height genetically. Inbred line CML270 was used for molecular assistedselection and cloning the genes.
基金
supported by“Resistance resource to sheath blight and its transferring breeding techniques assisted by molecular markers"(NO.971004)of 948 Project
Key project“Cloning of anti-sheath blight gene"by A gricultural and Biological Breeding Technology of Sichuan the Tenth Five-Year Plan
“Study on the screening and combination breeding techniques by molecular markers of insect-resistance,high quality and dry-resistance”(NO.2003AA207070)of the Tenth Five-Year 863 Program(the National High Technology Research and Development Program of China)
the“Study on corn breeding and germplasm resource"of Sichuan the Tenth Five-Year Plan
the post-doctor foundation of Sichuan Academy of Agricultural Science.
