Genome composition and genetic diversity of Musa germplasm from China revealed by PCR-RFLP and SSR markers

文献类型： 外文期刊

第一作者： Ning, Shu-Ping

作者： Ning, Shu-Ping;Xu, Lin-Bing;Lu, Yan;Huang, Bing-Zhi;Ge, Xue-Jun

作者机构：

关键词： China;genetic diversity;germplasm;SSR;Musa

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2007 年 114 卷 4 期

页码：

收录情况： SCI

摘要： Banana (Musa spp.) is one of the most important crops in the world. In this study, 216 banana accessions, 184 from the National Banana Germplasm Collection of China (NBGCC) and 32 from the International Network for the Improvement of Banana and Plantain (INIBAP), were used to determine the genome composition of banana plants in these collections and to estimate their genetic diversity. The genome composition was examined using PCR-RFLP markers. The molecular data for all but one accession (ITC 1231) from INIBAP were in agreement with the initial records based on phenotypic characteristics. Microsatellite (SSR) markers were used to investigate the genetic variability and relationships among these banana accessions. Ten of the 47 primer pairs tested consistently produced reproducible and discrete fragments. We identified a total of 92 alleles, ranging from 5 to 15 per locus. The genetic similarity between the accessions ranged between 0.1 and 1, when estimated using Jaccard's coefficient. The UPGMA method based on genetic similarities, grouped the NBGCC accessions according to those containing the 'A' and 'B' genomes. However, this analysis could not separate all the accessions, especially the somatic mutations, using the primers in this study. These data indicated that limited genetic variation exists within these accessions and the collections of NBGCC should include a much wider range of banana plant material. (C) 2007 Elsevier B.V. All rights reserved.

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