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The component and amount of nutrient in the growth medium are the major factors affecting root growth. For the systematic dissection of root gene expression, evaluation of nutrient and non-nutrient solutions was conducted for their effect on root traits and quantitative trait loci (QTL) mapping. Three rice root parameters, maximum root length (MRL), root dry weight (RDW), and root/ shoot ratio of dry weight (RSR), were characterized within a double haploid (DH) population from a cross of ZYQ8 (indica ) and JX17 (japonica). The value of the three root traits in two parents all decreased under the nutrient condition compared to those under the non-nutrient condition, of which RSR decreased up to 2.6-fold on average. In the DH population, more than 70% lines in MRL, 94% lines in RDW, and all the lines in RSR were scored lower. In total, eight QTLs were identified in nutrient system (5 from JX17 alleles and 3 from ZYQ8 aileles) while five QTLs were detected in non-nutrient system (4 from JX17 aileles and 1
For the systematic dissection of root gene expression, evaluation of nutrient and non-nutrient solutions were conducted for their effect on root traits and quantitative trait loci (QTL) Three rice root parameters, maximum root length (MRL), root dry weight (RDW), and root / shoot ratio of dry weight (RSR), were according to a double haploid (DH) population from a cross of ZYQ8 ) and JX17 (japonica). The value of the three root traits in two parents all decreased under the nutrient condition compared to those under the non-nutrient condition, of which RSR decreased to 2.6-fold on average. In the DH population, more than 70% lines in MRL, 94% lines in RDW, and all the lines in RSR were scored lower. In total, eight QTLs were identified in nutrient system (5 from JX17 alleles and 3 from ZYQ8 aileles) while five QTLs were detected in non-nutrient system (4 from J. X17 aileles and 1