数字农科院2.0

不同饲料饲育的家蚕幼虫肠道细菌的多样性分析

文献类型： 中文期刊

作者： 郝长富;李刚;孙熙;唐健;钱荷英;赵国栋;邓祥元;徐安英

作者机构：

关键词： 家蚕;高通量测序;16S rDNA;肠道菌群;物种多样性

期刊名称：昆虫学报

ISSN： 0454-6296

年卷期： 2019 年 1 期

页码： 61-72

摘要： [目的]为研究饲料对不同家蚕Bombyx mori品种肠道微生物菌群的影响.[方法]以筛选到的家蚕广食性品种GS和普通品种1015为研究对象,收集从收蚁开始分别饲育桑叶(GS. m和C1015. m组)和人工饲料(GS. b组)至4龄盛时期的家蚕肠道样本,采用高通量测序的方法对其肠道微生物16S r DNA的V3-V4区进行测序分析,比较它们之间肠道微生物的差异.[结果]在门水平上,所测家蚕肠道样本的优势菌为厚壁菌门(Firmicutes)和变形杆菌门(Proteobacteria);在科水平上,所测样本主要优势菌为明串珠菌科(Leuconostocaceae)、乳酸杆菌科(Lactobacillaceae)、肠杆菌科(Enterobacteriaceae)等;在属水平上,所测样本主要的优势菌为魏斯氏属Weissella、乳酸菌属Lactobacillus、布赫纳氏菌属Buchnera、甲基杆菌属Methylobacterium、叶瘤菌属Phyllobacterium、肠球菌属Enterococcus和脆弱拟杆菌属Bacteroides等.家蚕品种GS经桑叶和人工饲料饲育后,甲基杆菌属Methylobacterium、布赫纳氏菌属Buchnera等菌属仅在桑叶饲育的GS肠道内出现,而魏斯氏菌Weissella、短芽孢杆菌属Brevibacillus等菌属只在人工饲料饲育的GS肠道内出现.同是桑叶饲育的家蚕品种GS和1015,其肠道内相同的优势菌有叶瘤菌属Phyllobacterium、脆弱拟杆菌属Bacteroides、不动细菌属Acinetobacter等.相较于广食性蚕品种GS的肠道菌群,肠球菌属Enterococcus、草螺菌属Herbaspirillum、丝硫菌属Thiothrix等菌属仅在普通蚕品种1015肠道中被检测到.GS. b组家蚕肠道细菌的物种多样性低于GS. m和C1015. m.GS. m肠道中丰度差异显著性最高的菌群为变形菌门(Proteobacteria),GS. b肠道中丰度差异显著性最高的菌群为杆菌纲(Bacilli)和乳杆菌目(Lactobacillales),而C1015. m肠道中丰度差异显著性最高的菌群为粪肠球菌属Enterococcus和肠球菌科(Enterococcaceae).[结论]经桑叶饲育的不同蚕品种(GS和1015)的肠道微生物比人工饲料饲育的家蚕肠道微生物更趋于一致;经桑叶饲育的广食性家蚕肠道微生物物种多样性较高于经人工饲料饲育的广食性家蚕.

分类号： S881.2

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