Abstract:

To improve the utility efficiency of molecular marker assistant selection for drought-resistance traits of rice roots, by using the saturated molecular marked genetic linkage map, we integrated published QTLs for drought-resistance traits of rice roots and analysed the contribution rate, characters of distribution and facticity. The results are as below: Eleven main effect QTLs were determined by the analysis of contribution rate; Eleven QTL regions on chromosome 1,2,3,5,11 were confermed to have pleiotrophic effect according to location of QTLs on each chromosome; Thirty five “real-QTLs” and three “hot-QTLs” are found through the facticity analysis of these QTLs. These main effect QTLs ，pleiotrophic QTLs and “hot-QTLs”can be treated as a significant candidate area for molecular breeding of drought-resistance traits of rice roots.