期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 66, 期 18, 页码 5605-5615出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erv100
关键词
GWAS; high-throughput leaf scorer; leaf colour; leaf shape; leaf size; plant phenomics
资金
- National Program on High Technology Development [2013AA102403]
- National Natural Science Foundation of China [31200274, 30921091]
- Fundamental Research Funds for the Central Universities [2013PY034]
- Program for New Century Excellent Talents in University [NCET-10-0386]
A combination of high-throughput leaf phenotyping and genome-wide association analysis provides valuable insights into the genetic basis of rice leaf traits.Leaves are the plant's solar panel and food factory, and leaf traits are always key issues to investigate in plant research. Traditional methods for leaf trait measurement are time-consuming. In this work, an engineering prototype has been established for high-throughput leaf scoring (HLS) of a large number of Oryza sativa accessions. The mean absolute per cent of errors in traditional measurements versus HLS were below 5% for leaf number, area, shape, and colour. Moreover, HLS can measure up to 30 leaves per minute. To demonstrate the usefulness of HLS in dissecting the genetic bases of leaf traits, a genome-wide association study (GWAS) was performed for 29 leaf traits related to leaf size, shape, and colour at three growth stages using HLS on a panel of 533 rice accessions. Nine associated loci contained known leaf-related genes, such as Nal1 for controlling the leaf width. In addition, a total of 73, 123, and 177 new loci were detected for traits associated with leaf size, colour, and shape, respectively. In summary, after evaluating the performance with a large number of rice accessions, the combination of GWAS and high-throughput leaf phenotyping (HLS) has proven a valuable strategy to identify the genetic loci controlling rice leaf traits.
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