title: QTL analysis of percentage of  grains with chalkiness in Japonica rice (Oryza sativa).
abstract: Appearance  quality of rice grains is a major problem for rice production in many areas of  the world. We conducted a molecular marker-based genetic analysis of percentage  of grains with chalkiness (PGWC), which is a determining factor for appearance  quality; it strongly affects milling, eating and cooking quality. An F(8) recombinant inbred  line population, which consists of 261 lines derived from a cross between  Koshihikari (Japonica) and C602 (Japonica), was used for QTL  mapping. Three QTLs related to PGWC were detected on chromosomes 5, 8 and 10,  together explaining 50.8% of the genetic variation. The 'Koshihikari' alleles  qJPGC-5, qJPGC-8 and the 'C602' alleles at qJPGC-10 were associated with  reduced PGWC. The QTL contributions to phenotypic variance were 18.2, 9.6 and  25%, respectively. These QTL markers for PGWC could be used for developing  improved varieties.
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Ministry of Education, Tianjin, China. liuxia831930@yahoo.com.cn
authors.forename: X
authors.initials: X
authors.lastname: Liu
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: S W
authors.initials: SW
authors.lastname: Wang
mesh_terms: D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D003433:Crosses, Genetic; D056726:Genetic Association Studies; D012275:Oryza / Q000235:genetics* / Q000378:metabolism; D010641:Phenotype; D040641:Quantitative Trait Loci