Journal
CROP JOURNAL
Volume 4, Issue 3, Pages 220-228Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cj.2016.01.007
Keywords
Kernel number per spike; QTL mapping; Spike number per m(2); Thousand-kernel weight
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Funding
- National Natural Science Foundation of China [31171554]
- Major Projects for Development of New Genetically Modified Crops [2011ZX08002-003]
- Fund for the Doctoral Program of Higher Education of China [20123702110016]
- Natural Science Foundation of Shandong [ZR2015CM036]
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Spike number per m(2) (SN), kernel number per spike (KNPS) and thousand-kernel weight (TKW) are the three main components determining wheat (Triticum aestivum L.) yield. To evaluate the relationships among them a doubled haploid (DH) population consisting of 168 lines grown at three locations for three years was analyzed by unconditional and conditional QTL mapping. Thirty-three unconditional QTL and fifty-nine conditional QTL were detected. Among them, two QTL (QSN-DH-2B and QSN-DH-3A-1.1) improved SN, with no effect on KNPS. QKNPS-DH-2B-2.1 improved KNPS, with no effect on SN. QKNPS-DH-1A-1.1, QKNPS-DH-2D-1.1 and QKNPS-DH-6A improved KNPS, with no effect on SN or TKW. QKNPS-DH-6B was associated with increased SN and TKW. In addition, QTKW-DH-4B, QTKW-DH-5B and QTKW-DH-7B increased TKW without decreasing KNPS. These results provide useful information for marker assisted selection (MAS) and improvement in wheat yield. (C) 2016 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V.
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