Using F2 population derived from the cross of tall inbred 7922 by dwarf inbred 5003, an RFLP linkage map of maize has been constructed, on which 85 markers are distributed among 10 linkage groups and span maize genome...Using F2 population derived from the cross of tall inbred 7922 by dwarf inbred 5003, an RFLP linkage map of maize has been constructed, on which 85 markers are distributed among 10 linkage groups and span maize genome about 1827.8 cM with an average distance (24.4 cM) between markers. 106 F2:3 lines of the population were grown in a 10×11 simple rectangular lattice design of one-raw plots with two replications and evaluated for plant height (PH). With interval mapping procedure, 5 QTLs controlling plant height have been identified and their genetic effects and gene action determined. 2 major OTLs with opposite effect have been discovered. One for increasing plant height is ph 1 which is located at chromosome 2 and accounts for 51.8% of the total phenotypic variation; the other for decreasing plant height is ph3 which is located at chromosome 5 and accounts for 38.6% of the total phenotypic variation. The chromosomal location of ph3 might be the same as or close to the position of bv1, a dwarf mutant展开更多
文摘Using F2 population derived from the cross of tall inbred 7922 by dwarf inbred 5003, an RFLP linkage map of maize has been constructed, on which 85 markers are distributed among 10 linkage groups and span maize genome about 1827.8 cM with an average distance (24.4 cM) between markers. 106 F2:3 lines of the population were grown in a 10×11 simple rectangular lattice design of one-raw plots with two replications and evaluated for plant height (PH). With interval mapping procedure, 5 QTLs controlling plant height have been identified and their genetic effects and gene action determined. 2 major OTLs with opposite effect have been discovered. One for increasing plant height is ph 1 which is located at chromosome 2 and accounts for 51.8% of the total phenotypic variation; the other for decreasing plant height is ph3 which is located at chromosome 5 and accounts for 38.6% of the total phenotypic variation. The chromosomal location of ph3 might be the same as or close to the position of bv1, a dwarf mutant
