title: Quantitative trait loci underlying domestication- and yield-related traits in an Oryza sativa x Oryza rufipogon advanced backcross population.
abstract: To understand the genetic characteristics of the traits related to differentiation between cultivated rice and its wild progenitor, genetic factors controlling domestication- and yield-related traits were identified using a BC3F2 population derived from an accession of common wild rice (donor, Oryza rufipogon Griff.) collected from Yuanjiang, Yunnan province, China, and an indica cultivar, Teqing (recipient, Oryza sativa L.). A genetic linkage map consisting of 125 simple sequence repeat (SSR) markers was constructed. Based on the phenotypes of the 383 BC3F2 families evaluated in two environments, two domestication-related morphological traits, panicle shape and growth habit, were found to be controlled by single Mendelian factors. This implies that the recessive mutations of single genes controlling some morphological traits could have been easily selected during early domestication. By single-point analysis and interval mapping, 59 putative quantitative trait loci (QTLs) that influence 11 quantitative traits were detected at two sites, and 37.5% of the QTL alleles originating from O. rufipogon had a beneficial effect for yield-related traits in the Teqing background. Regions with significant QTLs for domestication- and yield-related traits were detected on chromosomes 1, 4, 5, 7, 8, and 12. Fine mapping and cloning of these domestication-related genes and QTLs will be useful in elucidating the origin and differentiation of Asian cultivated rice in the future.
authors.affiliation: Department of Plant Genetics and Breeding, China Agricultural University, Beijing 100094, China.
authors.forename: Lubin
authors.initials: L
authors.lastname: Tan
authors.forename: Peijiang
authors.initials: P
authors.lastname: Zhang
authors.forename: Fengxia
authors.initials: F
authors.lastname: Liu
authors.forename: Guijuan
authors.initials: G
authors.lastname: Wang
authors.forename: Sheng
authors.initials: S
authors.lastname: Ye
authors.forename: Zuofeng
authors.initials: Z
authors.lastname: Zhu
authors.forename: Yongcai
authors.initials: Y
authors.lastname: Fu
authors.forename: Hongwei
authors.initials: H
authors.lastname: Cai
authors.forename: Chuanqing
authors.initials: C
authors.lastname: Sun
mesh_terms: D003433:Crosses, Genetic; D018744:DNA, Plant / Q000235:genetics / Q000302:isolation & purification; D004843:Epistasis, Genetic; D008040:Genetic Linkage; D005819:Genetic Markers; D012275:Oryza / Q000235:genetics*; D040641:Quantitative Trait Loci
chemical_list: D018744:DNA, Plant; D005819:Genetic Markers