ACTA AGRICULTURAE BOREALI-SINICA ›› 2014, Vol. 29 ›› Issue (1): 78-82. doi: 10.7668/hbnxb.2014.01.015

Special Issue: Corn

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Using SSR Markers to Analysis the Genetic Diversity of Descendants from a Narrow Base Maize Population Developed by Biparental Mass Selection

LI Lu-jiang1, CHEN Wen-sheng2, LAN Hai1, PAN Guang-tang1, YANG Ke-cheng1   

  1. 1. Maize Research Institute, Sichuan Agricultural University, Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region,Ministry of Agriculture,Ya' an 625014,China;
    2. College of Agronomy,Sichuan Agricultural University, Chengdu 611130,China
  • Received:2013-10-11 Published:2014-02-28

Abstract: Five cycles of biparental mass selection(MS) were carried out in a narrow base synthetic maize population namely P4C0. The genetic diversity of 6 maize populations,including the basic population and the developed populations,were evaluated by 51 SSR markers. The results showed that the number of polymorphic loci,the percentage of polymorphic loci,the mean genetic distance,the expected heterozygosity(He) and the Shannon genetic diversity index(I) displayed a descending trend with the advance of selection,while the change after 2 to 3 cycles were not significant. After 5 cycles,the cumulative reduction is larger although the decrease were slight for per cycle. The number of genotypes selected also decreases with selection presented the trend of declining with the advance of selection and related to the location where the populations were developed. It concluded that the genetic diversity maintained in early generations,especially in the 1st and 2nd cycles,while it declined in advance cycles of MS. The alternative improvement of population in different ecological environments was advantageous to the selection of favorable genes.

Key words: Biparental mass selection(MS), Genetic diversity, Maize, Population, SSR

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Cite this article

LI Lu-jiang, CHEN Wen-sheng, LAN Hai, PAN Guang-tang, YANG Ke-cheng. Using SSR Markers to Analysis the Genetic Diversity of Descendants from a Narrow Base Maize Population Developed by Biparental Mass Selection[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2014, 29(1): 78-82. doi: 10.7668/hbnxb.2014.01.015.

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