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Acta Agron Sin ›› 2007, Vol. 33 ›› Issue (10): 1630-1636.

• ORIGINAL PAPERS • Previous Articles     Next Articles

Genetic Structure and Diversity of Both Enhanced Germplasms Developed during 10th Five Year Plan and Modern Cultivars Released during 1968–1995 in China

LI Ying-Hui1, LIU Yan1, GUAN Rong-Xia1, LIU Zhang-Xiong1, WEI Shu-Hong2, YANG Guang-Yu3, ZHOU Xin-An4, ZHANG Meng-Chen5, YANG Chun-Yan5, ZHU Bao-Ge6, LI Wei-Dong7, LIU Xue-Yi <SUP   

  1. 1 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, / Key Laboratory of Germplasm & Biotechnology, Ministry of Agriculture / The National Key Facility for Crop Gene Resources and Genetic Improvement 100081 Beijing; 2 Helongjiang Academy of Agricultural Sciences, Haerbin 150086, Helongjiang; 3 Jilin Academy of Agricultural Sciences, Gongzhuling 136100, Jilin; 4 Oil Crop Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, Hubei, P. R. China; 5 Hebei Academy of Agricultural Sciences, Shijiazhuang 050031, Hebei; 6 Chinese Academy of Sciences, 100101 Beijing; 7 Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan; 8 Shanxi Academy of Agricultural Sciences, Fenyang 032200, Shanxi; 9 Shandong Academy of Agricultural Sciences, Jinan 250100, Shandong; 10 Zhejiang Academy of Agricultural Sciences, Hangzhou 310021,; 11 Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
  • Received:2006-12-02 Revised:1900-01-01 Online:2007-10-12 Published:2007-10-12
  • Contact: QIU Li-Juan

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Abstract:

To clarify the patterns of genetic structure, 22 relased modern cultivars and 22 new enhanced germplasms were analyzed with 24 SSR markers. Among the total of 231 alleles, 36 unique alleles were found only in new enhanced germplasms. At Satt309 locus, which closely linked with soybean cyst nematode resistance, an allele, which only was found in Chinese soybean landrace, was confirmed. Combining the results obtained by using UPGMA method and model-based method, four distinct clusters were discovered. Cluster Ⅰ was comprised of 13 new enhanced germplasms from Northeast region and Shanxi province. Cluster Ⅱ included 8 released cultivars from Northerneast region. Cluster Ⅲ consisted of 4 new enhanced germplasms and 4 released cultivars from Huanghuaihai and Southern region. Cluster Ⅳ contained 4 relased cultivars from Jilin, Heilongjiang, Shanxi and Henan provinces. The results of genetic diversity analysis showed that the new enhanced germplasms, which utilized foreign germplasms and wild species as parent, broadened the genetic base of released cultivars in northeast region.

Key words: New enhanced germplasms, Released cultivar, SSR marker, Genetic diversity

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