首页> 外文期刊>American Journal of Plant Sciences >Tracking Selection Signatures Based on Variation in OsLEA27 within Myanmar Landraces of Upland and Dryland Rice
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Tracking Selection Signatures Based on Variation in OsLEA27 within Myanmar Landraces of Upland and Dryland Rice

机译:基于陆地棉和旱稻缅甸地方品种中OsLEA27变异的跟踪选择签名

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To track the selection evident along the genome segment of OsLEA27?gene, a member of dehydrin gene family, 2.9-kbp nucleotide sequence containing the promoter 5’ upstream and transcribed region of OsLEA27?was determined for 35 upland and dryland Myanmar landraces from drought-prone areas. Nucleotide diversity, neutrality tests, haplotype network analysis, and linkage disequilibrium (LD) analysis were performed to infer the impact of selection and to investigate nonrandom associations of SNPs within all or part of the entire OsLEA27?region. The evidence for LD, the presence of two distinct haplotype groups across four different geographical regions, and the significant values obtained in a sliding-window analysis of mutation-drift tests all suggest the effects of selection on OsLEA27?in a set of 30 landraces. The neutrality test values for 5’ upstream region of OsLEA27?were significantly negative (p OsLEA27 region was significantly negative in accessions of the northern group, indicating a recent increase in population size or selection pressure. This evidence for selection signatures at OsLEA27 in this study sample provides insight into the roles of selection, crop adaptation, and genetic diversity in establishing present-day variation at the OsLEA27 locus.
机译:为了追踪沿着脱水蛋白基因家族成员OsLEA27?基因的基因组片段进行的选择,针对35个干旱干旱的缅甸旱地和旱地缅甸地方品种,确定了2.9kbp核苷酸序列,其中包含OsLEA27?上游5'启动子和转录区。易发地区。进行了核苷酸多样性,中性测试,单倍型网络分析和连锁不平衡(LD)分析,以推断选择的影响并调查整个OsLEA27α区域内SNP的非随机关联。 LD的证据,在四个不同地理区域中存在两个不同的单倍型群的证据,以及在突变漂移试验的滑动窗口分析中获得的显着值均表明选择对一组30个地方品种中OsLEA27?的影响。 OsLEA27?5'上游区域的中性测试值显着为负(北部群体的p OsLEA27区域显着为负,表明种群数量或选择压力最近有所增加。该研究中OsLEA27的选择签名的证据该样本提供了关于选择,作物适应性和遗传多样性在建立OsLEA27基因座当前变异中的作用的见解。

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