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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (9): 198-212.DOI: 10.11686/cyxb2022409

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A study of genetic diversity in centipedegrass populations in Henan based on SSR markers

Yi-nan JI(), Xue-feng REN, Tian-tian GOU, Guo-zhang ZANG, Yi-qi ZHENG()   

  1. College of Horticulture and Plant Protection,Henan University of Science and Technology,Luoyang 471000,China
  • Received:2022-10-17 Revised:2023-01-11 Online:2023-09-20 Published:2023-07-12
  • Contact: Yi-qi ZHENG

Abstract:

Based on SSR molecular markers, this study analyzed the genetic diversity of centipedegrass populations in Henan. Ninety nine alleles were detected with the primers, the polymorphic information content of the primers was 0.53-0.88, and the percentage of polymorphic bands was 98.75%, showing that the selected primers had high polymorphism. Analysis of molecular variance (AMOVA) showed that genetic differentiation of centipedegrass in Henan occurred mainly within populations (86.96%) and showed frequent gene exchange among populations. Cluster analysis and a Mantel test showed that there was no correlation between geographic and genetic distance. The analysis of population genetic structure showed that 141 populations evaluated were divided into 3 subgroups, which was consistent with the results of principal coordinate analysis (PCoA). Redundancy analysis (RDA) showed that precipitation in the driest month was the main factor affecting the population structure of centipedegrass in Henan. Four outlier loci were detected by combining FDIST2 and BayeScan, and the detection rate of outlier loci was 4.04%. Some loci associated with environmental factors were detected by environmental correlation analysis. In future, we can carry out further transcriptomics research, annotate gene functions, and systematically reveal the adaptive evolutionary mechanism of centipedegrass.

Key words: centipedegrass, genetic differentiation, genetic diversity, population genetic structure