Theoretical and Applied Genetics

, Volume 128, Issue 5, pp 797–811 | Cite as

The effects of chromosome 6P on fertile tiller number of wheat as revealed in wheat-Agropyron cristatum chromosome 5A/6P translocation lines

  • Xueling Ye
  • Yuqing Lu
  • Weihua Liu
  • Guoyue Chen
  • Haiming Han
  • Jinpeng Zhang
  • Xinming Yang
  • Xiuquan Li
  • Ainong Gao
  • Lihui LiEmail author
Original Paper


Key message

This study explored the genetic constitutions of several wheat- A. cristatum translocation lines and determined the effects of A. cristatum 6P chromosome segments on fertile tiller number in wheat.


Progress in wheat breeding is hampered by a relatively narrow range of genetic variation. To overcome this hurdle, wild relatives of common wheat with superior agronomic traits are often used as donors of desirable genes in wheat-breeding programs. One of the successfully utilized wheat wild relatives is Agropyron cristatum (L.) Gaertn (2n = 4x = 28; genomes PPPP). We previously reported that WAT31-13 was a wheat-A. cristatum 5A-6P reciprocal translocation line with higher fertile tiller number and grain number per spike compared to common wheat. However, WAT31-13 was genetically unstable. In this study, we analyzed the 43 genetically stable progenies from WAT31-13 using genomic in situ hybridization, dual-color fluorescence in situ hybridization, and molecular markers. We classified them into three translocation types (TrS, TrL and TrA) and seven subtypes, and also pinpointed the translocation breakpoint. The genotypic data, combined with the phenotypes of each translocation type, enabled us to physically map agronomic traits to specific A. cristatum 6P chromosome arms or segments. Our results indicated that A. cristatum chromosome 6P played an important role in regulating fertile tiller number, and that positive and negative regulators of fertile tiller number existed on the A. cristatum chromosome arm 6PS and 6PL, respectively. By exploring the relationship between fertile tiller number and A. cristatum chromosome segment, this study presented a number of feasible approaches for creation, analysis, and utilization of wheat-alien chromosome translocation lines in genetic improvement of wheat.


Common Wheat Chinese Spring Wheat Chromosome Translocation Line Centromeric Retrotransposon 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was funded by the National High Technology Research and Development Program of China (863 program, No. 2011AA100102), the National Natural Science Foundation of China (No. 31271714), and the National Basic Research Program of China (973 program, No. 2011CB100104). We thank Dr. Xueyong Zhang (Institute of Crop Sciences, Chinese Academy of Agricultural Sciences) for generously providing the CRW probe used in this study.

Conflict of interest

The authors declare that there are no conflicts of interest.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Xueling Ye
    • 1
    • 2
  • Yuqing Lu
    • 1
  • Weihua Liu
    • 1
  • Guoyue Chen
    • 2
  • Haiming Han
    • 1
  • Jinpeng Zhang
    • 1
  • Xinming Yang
    • 1
  • Xiuquan Li
    • 1
  • Ainong Gao
    • 1
  • Lihui Li
    • 1
    Email author
  1. 1.National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijingChina
  2. 2.Triticeae Research InstituteSichuan Agricultural UniversityChengduChina

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