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Cereal Research Communications

, Volume 43, Issue 3, pp 353–363 | Cite as

Cytogenetic and Molecular Identification of a New Wheat-Thinopyrum intermedium Addition Line with Resistance to Powdery Mildew

  • X. L. Qi
  • X. F. Li
  • F. He
  • L. Q. Hu
  • Y. G. Bao
  • J. R. Gao
  • H. G. WangEmail author
Genetics

Abstract

Thinopyrum intermedium, which has many useful traits, is valuable for wheat breeding. A new wheat-Thinopyrum addition line, SN100109, was developed from the progeny of common wheat cultivar Yannong 15 and Th. intermedium. It was resistant to most races of Blumeria graminis f. sp tritici (Bgt), which caused powdery mildew in wheat, and its reactions were different from the reactions of gene Pm40 and Pm43. Genomic in situ hybridization (GISH) and molecular marker analysis were used to identify the genomic composition of SN100109. GISH results showed that SN100109 was a wheat-Th. intermedium disomic addition line containing one pair of J chromosomes, and the resistance gene was located on the alien additional chromosomes of SN100109. And four molecular markers BE425942, BF482714, Xgdm93 and BV679214 which were assigned to homologous group 2, were specific molecular markers of the additional chromosomes. All the results indicated that SN100109 contained one pair of 2J chromosomes. SN100109 can be used as a novel germplasm source for introducing powdery mildew resistance genes to wheat in breeding programs.

Keywords

Thinopyrum intermedium addition line powdery mildew genomic in situ hybridization molecular markers 

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Copyright information

© Akadémiai Kiadó, Budapest 2015

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • X. L. Qi
    • 1
  • X. F. Li
    • 1
  • F. He
    • 1
  • L. Q. Hu
    • 1
  • Y. G. Bao
    • 1
  • J. R. Gao
    • 1
  • H. G. Wang
    • 1
    Email author
  1. 1.College of AgronomyShandong Agricultural UniversityTaian, ShandongChina

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