Study on the Diversity of Epiphytic Bacteria on Corn and Alfalfa using Illumina MiSeq/NovaSeq High-throughput Sequencing System
Abstract PurposeTo investigate the diversity of the epiphytic bacteria on corn and alfalfa collected in Hengshui city and Xingtai city, hebei province, China.MethodsIllumina MiSeq/NovaSeq High-throughput sequencing systerm was used to conduct Paired-end sequencing of community DNA fragments from surface of corn and alfalfa in Hengshui and Xingtai. QIIME2 and R language were employed to sort and calculate the number of sequences and taxonomic units for each sample. Thereafter, the abundance, distribution, alpha diversity index of species, beta diversity and the differences of abundance among the samples were analyzed. ResultAt phylum level, the advantage bacterium group are Proteobacteria (70%), Firmicutes (13%), Actinobacteria (9%) and Bacteroidetes (7%). The dominant genera are Pseudomonas (8%), Acinetobacter (4%), Chryseobacterium (3%), Hymenobacter (1%). Enterobacteriaceae (24%) are the most predominant bacteria on both corn and alfalfa samples. Alpha diversity analysis and beta diversity analysis showed that the diversity of epiphytic microbial community was significantly affected by plant species, but not by region. The diversity and richness of epiphytic bacterial community of alfalfa were significantly higher than that of corn, yet corn had more LAB than alfalfa samples. ConclusionThis study contributes to expanding our understanding of the diversity of epiphytic microorganisms in corn and alfalfa silage and provide a basis for the selection of raw materials.