Genetic linkage of human height is confirmed to 9q22 and Xq24 |
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Authors: | Yao-Zhong Liu Peng Xiao Yan-fang Guo Dong-Hai Xiong Lan-Juan Zhao Hui Shen Yong-Jun Liu Volodymyr Dvornyk Ji-Rong Long Hong-Yi Deng Jin-Long Li Robert R. Recker Hong-Wen Deng |
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Affiliation: | (1) Osteoporosis Research Center, Creighton University Medical Center, 601 N 30th Street, Suite 6787, Omaha, NE 68131, USA;(2) Department of Biomedical Sciences, Creighton University, Omaha, NE 68131, USA;(3) The Key Laboratory of Biomedical Information and Engineering, Ministry of Education, and Institute of Molecular Genetics, School of Life Science and Technology, Xi’an Jiaotong University, 710049 Xi’an , People’s Republic of China;(4) Laboratory of Molecular and Statistical Genetics, College of Life Sciences, Hunan Normal University, 410081 Changsha, Hunan, People’s Republic of China;(5) Department of Biological Sciences, Kent State University, Kent, OH 44242, USA;(6) Seattle Biomedical Research Institute, 307 Westlake Ave N, Seattle, WA 98109, USA |
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Abstract: | Human height is an important and heritable trait. Our previous two genome-wide linkage studies using 630 (WG1 study) and an extended sample of 1,816 Caucasians (WG2 study) identified 9q22 [maximum LOD score (MLS)=2.74 in the WG2 study] and preliminarily confirmed Xq24 (two-point LOD score=1.91 in the WG1 study, 2.64 in the WG2 study) linked to height. Here, with a much further extended large sample containing 3,726 Caucasians, we performed a new genome-wide linkage scan and confirmed, in high significance, the two regions’ linkage to height. An MLS of 4.34 was detected on 9q22 and a two-point LOD score of 5.63 was attained for Xq24. In an independent sub-sample (i.e., the subjects not involved in the WG1 and WG2 studies), the two regions also achieved significant empirical P values (0.002 and 0.004, respectively) for “region-wise” linkage confirmation. Importantly, the two regions were replicated on a genotyping platform different from the WG1 and WG2 studies (i.e., a different set of markers and different genotyping instruments). Interestingly, 9q22 harbors the ROR2 gene, which is required for growth plate development, and Xq24 was linked to short stature. With the largest sample from a single population of the same ethnicity in the field of linkage studies for complex traits, our current study, together with two previous ones, provided overwhelming evidence substantiating 9q22 and Xq24 for height variation. In particular, our three consecutive whole genome studies are uniquely valuable as they represent the first practical (rather than simulated) example of how significant increase in sample size may improve linkage detection for human complex traits.Electronic Supplementary Material Supplementary material is available for this article at and is accessible for authorized users. |
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