本文主要研究内容
作者彭科兰,任大喜,刘建新(2019)在《不同年龄奶水牛瘤胃菌群多样性研究》一文中研究指出:本研究旨在利用16S rRNA高通量测序技术分析不同年龄奶水牛瘤胃菌群多样性,探究其随年龄增长变化的规律。选择4个年龄组,即Y组(12月龄,胎次=0)、M组(3~5岁,胎次=1)、E组(6~8岁,胎次=2)和O组(9岁及以上,胎次≥3),各组奶水牛分别为9、7、4和5头,采集瘤胃液并提取总DNA,经PCR扩增后对16S rDNA的V3~V4区进行高通量测序。结果表明:alpha多样性分析结果发现,随着年龄增长,奶水牛瘤胃菌群数量呈现显著下降的趋势(P=0.07),菌属相对丰度显著减少(P<0.05); beta多样性分析发现,不同年龄奶水牛的瘤胃菌群结构存在明显的不同,并随年龄增加个体间的瘤胃菌群结构差异逐渐增大。门水平下,本试验所有年龄奶水牛瘤胃的优势菌群为拟杆菌门(Bacteroidetes)、厚壁菌门(Firmicutes)和变形菌门(Proteobacteria);属水平下,普雷沃氏菌属1(Prevotella1)相对丰度在4个年龄组均最高,优势菌属和次级优势菌属的相对丰度随奶水牛年龄的增长呈现相互聚拢的趋势。不同年龄奶水牛瘤胃中存在着差异显著的特征性菌属,12月龄奶水牛瘤胃中以乳酸菌属(Lactobacillus)和糖酵菌属(Saccharofermentans)为主,其相对丰度随着年龄增长而显著减少(P<0.05); 3~5岁奶水牛瘤胃中则以未分类梭菌目菌属(unclassifiedoClostridiales)和未排位双歧杆菌科菌属(norankfBifidobacteriaceae)为主,相对丰度显著高于12月龄和9岁及以上年龄(P<0.05); 9岁及以上年龄奶水牛瘤胃中的未分类普雷沃氏菌科菌属(unclassifiedfPrevotellaceae)和候选单胞生糖菌属(CandidatusSaccharimonas)相对丰度高于12月龄和3~5岁。共性网络物种关联分析结果显示,奶水牛瘤胃菌群间的相关性和紧密性随着年龄增加而逐渐下降。综上所述,随着奶水牛年龄增长,其瘤胃菌群数量和相对丰度显著减少,优势菌群和亚优势菌群呈现一定的年龄特征变化;奶水牛瘤胃存在着一些年龄特征菌属,其菌群结构紧密性随年龄增加而减弱,表明宿主年龄增长可影响瘤胃菌群结构和功能的稳定。
Abstract
ben yan jiu zhi zai li yong 16S rRNAgao tong liang ce xu ji shu fen xi bu tong nian ling nai shui niu liu wei jun qun duo yang xing ,tan jiu ji sui nian ling zeng chang bian hua de gui lv 。shua ze 4ge nian ling zu ,ji Yzu (12yue ling ,tai ci =0)、Mzu (3~5sui ,tai ci =1)、Ezu (6~8sui ,tai ci =2)he Ozu (9sui ji yi shang ,tai ci ≥3),ge zu nai shui niu fen bie wei 9、7、4he 5tou ,cai ji liu wei ye bing di qu zong DNA,jing PCRkuo zeng hou dui 16S rDNAde V3~V4ou jin hang gao tong liang ce xu 。jie guo biao ming :alphaduo yang xing fen xi jie guo fa xian ,sui zhao nian ling zeng chang ,nai shui niu liu wei jun qun shu liang cheng xian xian zhe xia jiang de qu shi (P=0.07),jun shu xiang dui feng du xian zhe jian shao (P<0.05); betaduo yang xing fen xi fa xian ,bu tong nian ling nai shui niu de liu wei jun qun jie gou cun zai ming xian de bu tong ,bing sui nian ling zeng jia ge ti jian de liu wei jun qun jie gou cha yi zhu jian zeng da 。men shui ping xia ,ben shi yan suo you nian ling nai shui niu liu wei de you shi jun qun wei ni gan jun men (Bacteroidetes)、hou bi jun men (Firmicutes)he bian xing jun men (Proteobacteria);shu shui ping xia ,pu lei wo shi jun shu 1(Prevotella1)xiang dui feng du zai 4ge nian ling zu jun zui gao ,you shi jun shu he ci ji you shi jun shu de xiang dui feng du sui nai shui niu nian ling de zeng chang cheng xian xiang hu ju long de qu shi 。bu tong nian ling nai shui niu liu wei zhong cun zai zhao cha yi xian zhe de te zheng xing jun shu ,12yue ling nai shui niu liu wei zhong yi ru suan jun shu (Lactobacillus)he tang jiao jun shu (Saccharofermentans)wei zhu ,ji xiang dui feng du sui zhao nian ling zeng chang er xian zhe jian shao (P<0.05); 3~5sui nai shui niu liu wei zhong ze yi wei fen lei suo jun mu jun shu (unclassifiedoClostridiales)he wei pai wei shuang qi gan jun ke jun shu (norankfBifidobacteriaceae)wei zhu ,xiang dui feng du xian zhe gao yu 12yue ling he 9sui ji yi shang nian ling (P<0.05); 9sui ji yi shang nian ling nai shui niu liu wei zhong de wei fen lei pu lei wo shi jun ke jun shu (unclassifiedfPrevotellaceae)he hou shua chan bao sheng tang jun shu (CandidatusSaccharimonas)xiang dui feng du gao yu 12yue ling he 3~5sui 。gong xing wang lao wu chong guan lian fen xi jie guo xian shi ,nai shui niu liu wei jun qun jian de xiang guan xing he jin mi xing sui zhao nian ling zeng jia er zhu jian xia jiang 。zeng shang suo shu ,sui zhao nai shui niu nian ling zeng chang ,ji liu wei jun qun shu liang he xiang dui feng du xian zhe jian shao ,you shi jun qun he ya you shi jun qun cheng xian yi ding de nian ling te zheng bian hua ;nai shui niu liu wei cun zai zhao yi xie nian ling te zheng jun shu ,ji jun qun jie gou jin mi xing sui nian ling zeng jia er jian ruo ,biao ming su zhu nian ling zeng chang ke ying xiang liu wei jun qun jie gou he gong neng de wen ding 。
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论文作者分别是来自动物营养学报的彭科兰,任大喜,刘建新,发表于刊物动物营养学报2019年11期论文,是一篇关于奶水牛论文,瘤胃论文,微生物多样性论文,菌群论文,年龄论文,动物营养学报2019年11期论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自动物营养学报2019年11期论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。