Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (9): 1977-1989.DOI: 10.3969/j.issn.1004-1524.20231050

• Crop Seience • Previous Articles     Next Articles

Genetic diversity and association analysis between agronomic traits and SSR markers in hulless barley

ZHANG Yuanyuan1,2(), FENG Juling1,2, XIAO Jingfeng1,2, GUAN Yu1,2, LONG Chuer1,2, YAO Lirong1,2, MENG Yaxiong1,2, SI Erjing1,2, LI Baochun1,3, MA Xiaole1,2, WANG Huajun1,2, ZHOU Xirong4, LIU Meijin4, WANG Juncheng1,2,*()   

  1. 1. State Key Laboratory of Aridland Crop Science/Gansu Provincial Key Laboratory of Crop Improvement & Germplasm Enhancement, Lanzhou 730070, China
    2. College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
    3. College of Life Science and Techology, Gansu Agricultural University, Lanzhou 730070, China
    4. Gannan Tibetan Autonomous Prefecture Agricultural Science Research Institute, Hezuo 747000, Gansu, China
  • Received:2023-09-02 Online:2024-09-25 Published:2024-09-30

Abstract:

In order to understand the genetic diversity of hulless barley germplasms from different regions and to discover markers associated with agronomic traits. In this study, we analyzed the genetic diversity and population genetic structure of 102 hulless barley germplasms from different regions of Gansu and Xizang using 92 pairs of SSR markers, and the association analysis between SSR markers and agronomic traits was carried out by using the GLM model of Tassel 2.1 software. The results showed that a total of 739 alleles were identified by scanning 92 markers, and the variance of gene diversity index ranged from 0.106 to 0.913, the variance of polymorphism information content ranged from 0.103 to 0.907; the genetic similarity coefficient varied from 0.680 to 0.960, and the clustering analysis divided these hulless barley germplasms into two subgroups, germplasms with the same parentage or similar kinship were clustered together; the population genetic structure analysis divided the hulless barley germplasms into five subgroups; it was revealed that more than 9 agronomic traits of 33 markers were extremely remarkalbe at the P<0.01 level, there were 10 markers associated with thousand grain weight, of which the marker GBM1238 was more stable, and the explained rate of the phenotypic variance of these markers ranged from 8.95% to 35.02%. In conclusion, most of the hulless barley germplasms for the test in this study are similarly related, and different hulless barley genetic resources can be introduced to enrich the genetic background.

Key words: hulless barley, SSR, agronomic trait, genetic diversity, association analysis

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