Journal of Integrative Agriculture ›› 2017, Vol. 16 ›› Issue (11): 2386-2401.DOI: 10.1016/S2095-3119(17)61711-8

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  • 收稿日期:2016-11-28 出版日期:2017-11-20 发布日期:2017-11-03

Novel and favorable genomic regions for spike related traits in a wheat germplasm Pubing 3504 with high grain number per spike under varying environments

CHEN Dan1, 2*, WU Xiao-yang1*, WU Kuo2, ZHANG Jin-peng1, LIU Wei-hua1, YANG Xin-ming1, LI Xiu-quan1, LU Yu-qing1, LI Li-hui1   

  1. 1 National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2 Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences/Key Laboratory of Southwestern Crop Gene Resources and Germplasm Innovation, Ministry of Agriculture/Scientific Observation for Rice Germplasm Resources of Yunnan, Ministry of Agriculture/Yunnan Provincial Key Laboratory of Agricultural Biotechnology, Kunming 650223, P.R.China
  • Received:2016-11-28 Online:2017-11-20 Published:2017-11-03
  • Contact: Correspondance LI Li-hui, Tel: +86-10-62186670, Fax: +86-10-62189650, E-mail: lilihui@caas.cn
  • About author:CHEN Dan, E-mail: xiaoyezi09@163.com; WU Xiao-yang, E-mail: xtwxy1@163.com; * These authors contributed equally to this study.
  • Supported by:

    This work was supported by grants from the National Basic Research Program of China (973 Program, 2011CB100104), the National High-Tech R&D Program of China (2011AA100101), the National Natural Science Foundation of China (31071416), the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences and the National Key Technologies R&D Program of China during the 12th Five-Year Plan period (2013BAD01B02).

Abstract:    Grain number per spike (GNPS) is a major factor in wheat yield breeding.  A new wheat germplasm Pubing 3504 shows superior features in spike traits.  To elucidate the genetic basis of spike and yield related traits in Pubing 3504, 282 F2:3 families were generated from the cross Pubing 3504×Jing 4839, and seven spike and yield related traits, including GNPS, spike length (SL), kernel number per spikelet (KPS), spikelet number per spike (SNS), thousand-grain weight (TGW), spike number per plant (SNP), and plant height (HT) were investigated.  Correlation analysis indicated significant positive correlations between GNPS and spike-related traits, including KPS, SNS, and SL, especially KPS.  A genetic map was constructed using 190 polymorphic simple sequence repeat (SSR), expressed sequence tag (EST)-SSR, and sequence-tagged-site (STS) markers.  For the seven traits measured, a total of 37 quantitative trait loci (QTLs) in a single-environment analysis and 25 QTLs in a joint-environment analysis were detected.  Additive effects of 70.3% (in a single environment) and 57.6% (in a joint environment) of the QTLs were positively contributed by Pubing 3504 alleles.  Five important genomic regions on chromosomes 1A, 4A, 4B, 2D, and 4D could be stably detected in different environments.  Among these regions, the marker interval Xmag834–Xbarc83 on the short arm of chromosome 1A was a novel important genomic region that included QTLs controlling GNPS, KPS, SNS, TGW, and SNP with stable environmental repeatability.  This genomic region can improve the spike trait and may play a key role in improving wheat yield in the future.  We deduced that this genomic region was vital to the high GNPS of Pubing 3504.

Key words: wheat ,  high GNPS germplasm ,  QTL mapping ,  genomic region