Adaptive genetic differentiation and solar radiation in wild emmer wheat, triticum dicoccoides

Jing Ren, Liang Chen, Xiaoli Jin, Xuegui Yin, Chunjie Fu, Eviatar Nevo, Junhua Peng

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Microgeographic studies of molecular markers could reveal the nature and dynamics of genetic diversity and the evolutionary driving forces shaping evolution. Methods: The microclimatic genetic divergence of wild emmer wheat associated with solar radiation was investigated, in the present study, using multiple types of molecular markers including allozyme, amplified polymorphic DNA (RAPD), simple sequence repeat (SSR), and single nucleotide polymorphisms (SNP). The studies included two climatic microniches: (1) sunny between oak trees; and (2) shady under the canopies of oak trees. Results: All four types of markers showed a similar microniche tendency of genetic variance, i.e., lower in the shady than in the sunny niche. Significant genetic divergence at some loci including allozyme, RAPD, SSR, and SNP was detected between the two climatic microniches, and also, the observed genetic differentiation is mainly due to natural selection. Based on different FST outlier detection algorithms, there were 21 candidate loci subjected to positive selection. Importantly, most of the identified candidate loci were mapped in the selection “hot spots” of wheat genome. Conclusion: The present work implies that microclimatic selection appears to play an important role either in the protein-coding region or in the non-coding region of wheat genomes, and hence, highlights the evolutionary theory of natural selection.

Original languageEnglish
Pages (from-to)1017-1024
Number of pages8
JournalCurrent Pharmaceutical Biotechnology
Volume18
Issue number12
DOIs
StatePublished - 1 Oct 2017

Bibliographical note

Funding Information:
This work was supported by the China National Science Foundation (NSFC) Grant No. 31030055 and 30870233 (to J.H. Peng), NSFC Grant No. 31701424 (to J. Ren), the Project of Shandong Province Higher Educational Science and Technology Program Grant No. J17KA123 (to J. Ren), Natural Science Foundation of Shandong Province (ZR2015CQ002), and the Taishan Young Scholars Program of Shandong Province of China (tsqn20161049).

Publisher Copyright:
© 2017 Bentham Science Publishers.

Keywords

  • Adaptive divergence
  • Genetic variation
  • Molecular markers
  • Positive selection
  • Solar radiation
  • Wild emmer wheat

ASJC Scopus subject areas

  • Biotechnology
  • Pharmaceutical Science

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