title: Identification and Physical Mapping of New PCR-Based Markers Specific for the Long Arm of Rye (Secale cereale L.) Chromosome 6.
abstract: To effectively use elite genes on the long arm of rye chromosome 6 (the 6RL arm) in wheat breeding programs, precise and fast identification of 6RL chromatin in wheat backgrounds is necessary. PCR-based 6RL-specific markers can facilitate the detection of elite genes on 6RL in wheat breeding. However, only a limited number of 6RL-specific markers have been developed. In the present study, 300 new PCR-based 6RL-specific markers were identified using specific length amplified fragment sequencing (SLAF-seq) technology, and were further physically mapped to four regions on the 6RL arm using 6R and 6RL deletion lines. Interestingly, 127 of the 300 markers were physically localized to a region from the site between 2.3 and 2.5 to the telomere, the same region where the powdery mildew resistance gene was mapped. In addition, 95 of the 300 markers exhibit polymorphisms, which can be used to investigate the diversity of rye 6RL arms. The markers developed in this study can be used to identify given segments of 6RL in wheat backgrounds and accelerate the utilization of elite genes on 6RL in wheat breeding.
authors.affiliation: Province Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu 611130, China; Agronomy College, Sichuan Agricultural University, Chengdu 611130, China.
authors.forename: Meng
authors.initials: M
authors.lastname: Li
authors.affiliation: Province Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu 611130, China; Agronomy College, Sichuan Agricultural University, Chengdu 611130, China.
authors.forename: Zongxiang
authors.initials: Z
authors.lastname: Tang
authors.affiliation: Province Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu 611130, China; Agronomy College, Sichuan Agricultural University, Chengdu 611130, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Qiu
authors.affiliation: Province Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu 611130, China; Agronomy College, Sichuan Agricultural University, Chengdu 611130, China.
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Province Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu 611130, China; Agronomy College, Sichuan Agricultural University, Chengdu 611130, China.
authors.forename: Shuyao
authors.initials: S
authors.lastname: Tang
authors.affiliation: Province Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu 611130, China; Agronomy College, Sichuan Agricultural University, Chengdu 611130, China. Electronic address: fusl1981@sina.com.
authors.forename: Shulan
authors.initials: S
authors.lastname: Fu
mesh_terms: D032461:Chromosomes, Plant / Q000235:genetics*; D060467:Disease Resistance / Q000235:genetics; D005819:Genetic Markers / Q000235:genetics*; D020161:Physical Chromosome Mapping; D010935:Plant Diseases / Q000276:immunology / Q000382:microbiology; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D012434:Secale / Q000235:genetics*
chemical_list: D005819:Genetic Markers
keywords: 6RL-specific marker; Physical mapping; Powdery mildew; Rye; SLAF-seq; Wheat