QTLs Mapping for Agronomic Traits in RIL of Japonica Cultivar？Japonica Weody Rice
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A population of recombinant inbred lines derived from a cross between Ilpumbyeo, a blast-susceptible japonica cultivarof high eating-quality and high yield potential, and GL33, a blast-resistance japonicaing important agronomic traits. A total of putative fourteen QTLs were identified, of which nine QTLs were from Ilpumbyeo alle-les, and five were from GL33 alleles. The percentage of phenotypic variance explained by each QTL ranged from 6.4% to 30.2%with an average of 12.5%. Of three QTLs detected for days to heading, qhd3 and qhd7 from GL33 functioned to shorten the daysto heading time by GL3 alleles. Three QTLs, qsnpp7 for spikelet number per panicle, qpgr6qyi1 for yield have not been detected in the previous QTLs studies. A QTL qcl1 for culm length explaining 23.6% of phenotypicvariation on chromosome 1 was identified at the region of sd-1 gene. Some QTLs, especially for yield component traits on chro-mosome 1, 3, 6 and 7 were clustered together froming QTL blocks. These QTL blocks seemed to be useful for marker-assistedselection in japonica rice breeding program.
Abstract
A population of recombinant inbred lines derived from a cross between Ilpumbyeo, a blast-susceptible japonica cultivarof high eating-quality and high yield potential, and GL33, a blast-resistance japonicaing important agronomic traits. A total of putative fourteen QTLs were identified, of which nine QTLs were from Ilpumbyeo alle-les, and five were from GL33 alleles. The percentage of phenotypic variance explained by each QTL ranged from 6.4% to 30.2%with an average of 12.5%. Of three QTLs detected for days to heading, qhd3 and qhd7 from GL33 functioned to shorten the daysto heading time by GL3 alleles. Three QTLs, qsnpp7 for spikelet number per panicle, qpgr6qyi1 for yield have not been detected in the previous QTLs studies. A QTL qcl1 for culm length explaining 23.6% of phenotypicvariation on chromosome 1 was identified at the region of sd-1 gene. Some QTLs, especially for yield component traits on chro-mosome 1, 3, 6 and 7 were clustered together froming QTL blocks. These QTL blocks seemed to be useful for marker-assistedselection in japonica rice breeding program.