Genetic diversity, population structure and marker-trait associations for agronomic and grain traits in wild diploid wheat Triticum urartu

BMC Plant Biology

Research Article

Kehui Zhan¹  Yiwen Li²  Wenlong Yang²  Dongcheng Liu²  Jiazhu Sun²  Aimin Zhang³  Guangbin Luo⁴  Xin Wang⁴ 

[1]College of Agronomy/The Collaborative Innovation Center of Grain Crops in Henan, Henan Agricultural University, No. 95 Wenhua Road, 450002, Zhengzhou, China

[2]State Key Laboratory of Plant Cell and Chromosome Engineering, National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 1 West Beichen Road, Chaoyang District, 100101, Beijing, China

[3]State Key Laboratory of Plant Cell and Chromosome Engineering, National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 1 West Beichen Road, Chaoyang District, 100101, Beijing, China

[4]College of Agronomy/The Collaborative Innovation Center of Grain Crops in Henan, Henan Agricultural University, No. 95 Wenhua Road, 450002, Zhengzhou, China

[5]State Key Laboratory of Plant Cell and Chromosome Engineering, National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 1 West Beichen Road, Chaoyang District, 100101, Beijing, China

[6]University of Chinese Academy of Sciences, 100049, Beijing, China

关键词: Triticum urartu;    Genetic diversity;    SSR markers;    HMW-GS;    Marker-trait association;   

DOI  :  10.1186/s12870-017-1058-7

 received in 2017-02-23, accepted in 2017-06-14,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundWild diploid wheat, Triticum urartu (T. urartu) is the progenitor of bread wheat, and understanding its genetic diversity and genome function will provide considerable reference for dissecting genomic information of common wheat.ResultsIn this study, we investigated the morphological and genetic diversity and population structure of 238 T. urartu accessions collected from different geographic regions. This collection had 19.37 alleles per SSR locus and its polymorphic information content (PIC) value was 0.76, and the PIC and Nei’s gene diversity (GD) of high-molecular-weight glutenin subunits (HMW-GSs) were 0.86 and 0.88, respectively. UPGMA clustering analysis indicated that the 238 T. urartu accessions could be classified into two subpopulations, of which Cluster I contained accessions from Eastern Mediterranean coast and those from Mesopotamia and Transcaucasia belonged to Cluster II. The wide range of genetic diversity along with the manageable number of accessions makes it one of the best collections for mining valuable genes based on marker-trait association. Significant associations were observed between simple sequence repeats (SSR) or HMW-GSs and six morphological traits: heading date (HD), plant height (PH), spike length (SPL), spikelet number per spike (SPLN), tiller angle (TA) and grain length (GL).ConclusionsOur data demonstrated that SSRs and HMW-GSs were useful markers for identification of beneficial genes controlling important traits in T. urartu, and subsequently for their conservation and future utilization, which may be useful for genetic improvement of the cultivated hexaploid wheat.

【 授权许可】

CC BY   
© The Author(s). 2017