Development and use of EST-SSR markers for assessing genetic diversity in the brown planthopper (Nilaparvata lugens Stal)
文献类型: 外文期刊
作者: Jing, S.;Liu, B.;Peng, L.;Peng, X.;Zhu, L.;He, G.;Fu, Q.
作者机构:
关键词: brown planthopper;simple sequence repeat;express sequence tag;genetic diversity;biotype
期刊名称: BULLETIN OF ENTOMOLOGICAL RESEARCH
ISSN: 0007-4853
年卷期: 2012 年 102 卷 1 期
页码:
收录情况: SCI
摘要: To assess genetic diversity in populations of the brown planthopper (Nilaparvata lugens Stal) (Homoptera: Delphacidae), we have developed and applied micro-satellite, or simple sequence repeat (SSR), markers from expressed sequence tags (ESTs). We found that the brown planthopper clusters of ESTs were rich in SSRs with unique frequencies and distributions of SSR motifs. Three hundred and fifty-one EST-SSR markers were developed and yielded clear bands from samples of four brown planthopper populations. High cross-species transferability of these markers was detected in the closely related planthopper N. muiri. The newly developed EST-SSR markers provided sufficient resolution to distinguish within and among biotypes. Analyses based on SSR data revealed host resistance-based genetic differentiation among different brown planthopper populations; the genetic diversity of populations feeding on susceptible rice varieties was lower than that of populations feeding on resistant rice varieties. This is the first large-scale development of brown planthopper SSR markers, which will be useful for future molecular genetics and genomics studies of this serious agricultural pest.
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