Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (6): 965-973.DOI: 10.3969/j.issn.1004-1524.2021.06.01

• Crop Science • Previous Articles     Next Articles

Association analysis between SSR markers and germination-related traits in sorghum germplasm resources

LIU Xiuhui(), ZOU Guihua, ZHAI Guowei, LIU Heqin, ZHENG Xueqiang, CHEN Heyun*()   

  1. Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2020-10-21 Online:2021-06-25 Published:2021-06-25
  • Contact: CHEN Heyun

Abstract:

Fifty-four pairs of simple sequence repeat (SSR) markers spanned uniformly over sorghum genome were selected to detect 110 sorghum germplasm resources. The relevances between SSR and germination-related traits (mesocotyl length, coleoptile elongate, root length, and hundred-grain weight) were studied in order to provide theoretical foundation and materials for screening elite deep-seeding tolerance in sorghum. The results showed that there were significantly (P≤0.05) negative correlation between mesocotyl length and root length, and significantly (P≤0.01) positive correlation between mesocotyl length and coleoptile length. Significantly (P≤0.01) positive correlations were found among coleoptile length, root length, and hundred-grain weight. A total of 339 alleles were identified at all of 54 SSR markers loci, with an average of 6.28 alleles per marker locus and 2.67 effective alleles. The average values of Shannon’s information index were 1.129 9. All of the sorghum germplasms were divided into three subgroups by structural analysis. Nine sites had significant (P≤0.05) correlation with mesocotyl length, whose phenotypic contribution rate was from 11.18%-28.05%. Five sites had significant (P≤0.05) correlation with coleoptile elongate, whose phenotypic contribution rate were 11.22%-18.12%. Only one site had significant (P≤0.05) correlation with root length. Two sites had significant correlation with hundred-grain weight.

Key words: sorghum, seedling-emergence related traits, SSR markers, association analysis

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