Genetic Diversity Revealed by Single Nucleotide Polymorphism Markers in a Worldwide Germplasm Collection of Durum Wheat

International Journal of Molecular Sciences

Jing Ren¹  Daokun Sun¹  Liang Chen¹  Frank M. You³  Jirui Wang³  Yunliang Peng²  Eviatar Nevo⁵  Dongfa Sun⁴  Ming-Cheng Luo³ 

[1] Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Chinese Academy of Sciences, Wuhan 430074, Hubei, China; E-Mails:;Institute of Plant Protection, Sichuan Academy of Agricultural Sciences, Chengdu 610066, Sichuan, China; E-Mail:;Department of Plant Sciences, University of California, Davis, CA 95616, USA; E-Mails:;College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430071, Hubei, China; E-Mail:;Institute of Evolution, University of Haifa, Mount Carmel, Haifa 31905, Israel; E-Mail:

关键词: T. durum;    landrace;    cultivars;    molecular marker;    SNP;    genetic structure;   

DOI  :  10.3390/ijms14047061

来源: mdpi

【 摘 要 】

Evaluation of genetic diversity and genetic structure in crops has important implications for plant breeding programs and the conservation of genetic resources. Newly developed single nucleotide polymorphism (SNP) markers are effective in detecting genetic diversity. In the present study, a worldwide durum wheat collection consisting of 150 accessions was used. Genetic diversity and genetic structure were investigated using 946 polymorphic SNP markers covering the whole genome of tetraploid wheat. Genetic structure was greatly impacted by multiple factors, such as environmental conditions, breeding methods reflected by release periods of varieties, and gene flows via human activities. A loss of genetic diversity was observed from landraces and old cultivars to the modern cultivars released during periods of the Early Green Revolution, but an increase in cultivars released during the Post Green Revolution. Furthermore, a comparative analysis of genetic diversity among the 10 mega ecogeographical regions indicated that South America, North America, and Europe possessed the richest genetic variability, while the Middle East showed moderate levels of genetic diversity.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland