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Home / Journal of Plant Genetic Resources, Volume 14, Number 5

Open Access Analysis of Genetic Diversity with population of Japonica Rice from Ningxia using Microsatellite Markers

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A total of 82 SSR markers Distributed in 12 chromosomes were used to analyze genetic diversity and genetic similarity in 59 rice varieties of Ningxia after 1980s. 339 alleles were revealed, and 2 to 19 alleles were identified among different loci. The mean number of alleles per locus was 4.13. Total genetic diversity index of Nei varied greatly among loci from 0.0333 to 0.8164, with an average of 0.4394. The 55 rice varieties were divided into 3 groups according to their released years. With the increase of the year, both the number of alleles and genetic diversity showed an increasing trend significantly (P <0.001). upgma="" cluster="" analysis="" showed="" that="" the="" 59="" rice="" varieties="" were="" cluster="" into="" five="" categories="" at="" the="" level="" with="" genetic="" similarity="" coefficient="" of="" 0.75.="" the="" category="" ="" has="" only="" one="" aromatic="" rice,="" ="" and="" ="" both="" have="" three="" varieties,="" and="" category="" ="" contains="" five="" varieties="" similar="" to="" jilin="" rice.="" the="" most="" rice="" varieties="" were="" clustered="" into="" category="" ,="" which="" accout="" for="" 79.7%="" of="" the="" tested="" varieties.="" compared="" the="" pedigree="" of="" rice="" varieties,="" the="" vast="" major="" varieties="" have="" kinship="" of="" ningxia="" core="" parental="" such="" as="" hongqi="" 12,="" jingyin="" 39,="" dongfanghong="" 2,="" jingyin="" 59,="" etc,="" which="" showed="" close="" relationship="" among="" varieties.="" although="" the="" genetic="" diversity="" of="" ningxia="" rice="" has="" increased="" in="" recent="" years,="" the="" genetic="" basis="" is="" still="" narrow.="" the="" similarity="" coefficient="" of="" the="" tested="" varieties="" is="" above="" 0.75,="" even="" as="" high="" as="" 0.94.="" breeders="" must="" introduce="" and="" innovate="" in="" more="" rice="" parental="" materials="" in="" order="" to="" expand="" the="" genetic="" foundation="" of="" ningxia="" rice="" in="" the="">

Keywords: Genetic diversity; Japonica Rice varieties of Ningxia; SSR; cluster analysis

Document Type: Research Article

Publication date: 15 January 2014

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  • Journal of plant genetic resources is devoted to reporting new and original experimental and theoretical basic research of interest to genetic resources, gene mining, brief information,and germplasm innovation. Manuscripts that are essentially reporting data, applications of data, or reviews of the literature are not suitable for publication in Journal of plant genetic resources.

    Journal of plant genetic resources was founded in 2000 and is sponsored by the institute of crop sciences of chinese academy of agriculture sciences and China association of agricultural science societies. Since 2003, Journal of plant genetic resources has been indexed in China scientific journal database (CSJD), Chinese core journals (selection) database,Chinese science citation database (CSCD), and so on.
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