QTL Analysis of Plant Height based on Doubled Haploid (DH) Population derived from PTSMS Wheat
1. Beijing Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, P.R. China
2. Capital Normal University, Bejing, 100048, P.R. China
* The authors who contribute equally
Molecular Plant Breeding, 2011, Vol. 2, No. 13 doi: 10.5376/mpb.2011.02.0013
Received: 14 Apr., 2011 Accepted: 12 Jul., 2011 Published: 20 Jul., 2011
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Preferred citation for this article:
Zhang et al., 2011, QTL Analysis of Plant Height Based on Doubled Haploid (DH) Population Derived from PTSMS Wheat, Molecular Plant Breeding, Vol.2 No.13 (doi: 10.5376/mpb.2011.02.0013)
Plant height is one of the important agronomic traits in common wheat. Comprehensive studies of genetic basis on plant heigh will lay the grounds for breeding program, variety improvement and extension. In this study, a population of 234 doubled haploid (DH) lines derived from the cross between BS366, the photopeiod-thermo sensitive male sterile line, and common wheat cultivar Baiyu149 was used to detect the QTLs for plant height in wheat. The DH lines of the population and their parents were planted at Experimental Station in Beijing and Funan of Anhui in 2007 and 2008, respectively. With the aid of the method of composite interval mapping (CIM), 25 QTLs related to the trait of plant height were detected , which were mapped on chromosomes 1A, 1B, 2A, 2B, 2D, 3B (two QTLs), 3D (two QTLs), 4B, 5A (two QTLs), 6A, 6B (three QTLs), 6D, 7A (three QTLs), 7B (four QTLs) and 7D chromosomes. Single QTL can explain 2.11%~9.64% of the phenotypic variations while the additive effect of the detected QTL ranged from 3.35 to 16.19. Seven QTLs were detected at both experimental sites in Beijing and Funan in 2007, which were mapped on 1B, 2A, 3B (2 QTLs), 3D, and 6B (2 QTLs), whereas only five QTLs were both detected in the two locations in 2008, which were mapped on 2B, 6B, 7B (2QTLs ), and 7D. The QTLs mapped on chromosome 7A were only found in the location of Beijing, which might imply that the environmental effects exit in different locations . In this research the significant QTL mapped on Chromosome 6B was detected under the conditions of the four environments, which demonstrated that the detected QTL might be stable in different environmental conditionss and could be as a dominant loci for the applications of marker-assisted breeding program.
Common wheat (Triticum aestivum L.); Photopeiod-thermo sensitive male sterile; Plant height; Doubled haploid (DH) population; QTL