Biotechnology |
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Identification of QTLs for yield and yield components of barley under different growth conditions |
Da-wei Xue, Mei-xue Zhou, Xiao-qin Zhang, Song Chen, Kang Wei, Fan-rong Zeng, Ying Mao, Fei-bo Wu, Guo-ping Zhang |
College of Life and Environment Sciences, Hangzhou Normal University, Hangzhou 310036, China, Department of Agronomy, Zhejiang University, Hangzhou 310029, China, Tasmanian Institute of Agricultural Research, University of Tasmania, Kings Meadows, TAS 7249, Australia |
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Abstract Waterlogging is a major abiotic stress limiting barley (Hordeum vulgare L.) yield and its stability in areas with excessive rainfall. Identification of genomic regions influencing the response of yield and its components to waterlogging stress will enhance our understanding of the genetics of waterlogging tolerance and the development of more tolerant barley cultivars. Quantitative trait loci (QTLs) for grain yield and its components were identified using 156 doubled haploid (DH) lines derived from a cross between the cultivars Yerong (waterlogging-tolerant) and Franklin (waterlogging-sensitive) grown under different conditions (waterlogged and well drained). A total of 31 QTLs were identified for the measured characters from two experiments with two growth environments. The phenotypic variation explained by individual QTLs ranged from 4.74% to 55.34%. Several major QTLs determining kernel weight (KW), grains per spike (GS), spikes per plant (SP), spike length (SL) and grain yield (GY) were detected on the same region of chromosome 2H, indicating close linkage or pleiotropy of the gene(s) controlling these traits. Some different QTLs were identified under waterlogging conditions, and thus different markers may have to be used in selecting cultivars suitable for high rainfall areas.
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Received: 22 October 2009
Published: 10 March 2010
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Cite this article:
Da-wei Xue, Mei-xue Zhou, Xiao-qin Zhang, Song Chen, Kang Wei, Fan-rong Zeng, Ying Mao, Fei-bo Wu, Guo-ping Zhang. Identification of QTLs for yield and yield components of barley under different growth conditions. Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2010, 11(3): 169-176.
URL:
http://www.zjujournals.com/xueshu/zjus-b/10.1631/jzus.B0900332 OR http://www.zjujournals.com/xueshu/zjus-b/Y2010/V11/I3/169
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