title: QTL Analysis of Spike Morphological Traits and Plant Height in Winter Wheat (Triticum aestivumL.) Using a High-Density SNP and SSR-Based Linkage Map.
abstract: Wheat yield can be enhanced by modifying the spike morphology and the plant height. In this study, a population of 191 F9recombinant inbred lines (RILs) was developed from a cross between two winter cultivars Yumai 8679 and Jing 411. A dense genetic linkage map with 10,816 markers was constructed by incorporating single nucleotide polymorphism (SNP) and simple sequence repeat (SSR) marker information. Five spike morphological traits and plant height were evaluated under nine environments for the RILs and parental lines, and the number of detected environmentally stable QTLs were 18 and three, respectively. The 1RS/1BL (rye) translocation increased both spike length and spikelet number with constant spikelet compactness. TheQPht.cau-2D.1was identical to geneRht8, which decreased spike length without modifying spikelet number. Notably, four novel QTLs locating on chromosomes 1AS (QSc.cau-1A.1), 2DS (QSc.cau-2D.1), and 7BS (QSl.cau-7B.1andQSl.cau-7B.2) were firstly identified in this study, which provide further insights into the genetic factors that shaped the spike morphology in wheat. Moreover, SNP markers tightly linked to previously reported QTLs will eventually facilitate future studies including their positional cloning or marker-assisted selection.
authors.affiliation: State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization, Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural UniversityBeijing, China; National Plant Gene Research CentreBeijing, China.
authors.forename: Huijie
authors.initials: H
authors.lastname: Zhai
authors.affiliation: State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization, Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural UniversityBeijing, China; National Plant Gene Research CentreBeijing, China.
authors.forename: Zhiyu
authors.initials: Z
authors.lastname: Feng
authors.affiliation: State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization, Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural UniversityBeijing, China; National Plant Gene Research CentreBeijing, China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Li
authors.affiliation: State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization, Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural UniversityBeijing, China; National Plant Gene Research CentreBeijing, China.
authors.forename: Xinye
authors.initials: X
authors.lastname: Liu
authors.affiliation: Institute of Crop Science, Chinese Academy of Agricultural Sciences Beijing, China.
authors.forename: Shihe
authors.initials: S
authors.lastname: Xiao
authors.affiliation: State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization, Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural UniversityBeijing, China; National Plant Gene Research CentreBeijing, China.
authors.forename: Zhongfu
authors.initials: Z
authors.lastname: Ni
authors.affiliation: State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization, Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural UniversityBeijing, China; National Plant Gene Research CentreBeijing, China.
authors.forename: Qixin
authors.initials: Q
authors.lastname: Sun
keywords: QTL; SNP; SSR; plant height; spike morphology; wheat