Study on Fertility Characteristic and development on New System of Male sterile lines of Nian Type in Wheat M.A. Postgraduate: Na Niu Tutor: Prof, Gaisheng Zhang Yangling, Shaanxi, 712100) Abstract The Cms is one of the main ways to make use of wheat heterosis In order to probe into
美国国家生物技术信息中心( National Center for biotechnology Information fa] 称NCBI)创建于1988年。 1991年,NCB|开发了 Entrez数据库查询系 统,用于对 Gen Bank等分子生物学和生物 医学文献摘要( Medline)等数据库的査询 ( Schuler et al,1996)