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Acta Prataculturae Sinica ›› 2009, Vol. 18 ›› Issue (2): 25-32.

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Genetic variation of asexual reproduction characteristics of Cynodon dactylon

WANG Zhi-yong1,2, LIU Jian-xiu2, GUO Hai-lin2   

  1. 1.Department of Horticulture, Nanjing Agricultural Univeristy, Nanjing 210095, China;
    2.Institute
    of Botany, Jiangsu Province &
    Chinese Academy of Sciences, Nanjing 210014, China
  • Received:2008-04-07 Online:2009-04-20 Published:2009-04-20

Abstract: The study utilized 5 asexual reproductive traits (coefficient of expansion, level growth rate, vertical growth rate, the number of stolons per unit perimeter and the longest stolon) in order to make a preliminary assessment of genetic variation of asexual reproduction characteristics among the 33 different geographical distributions of wild Bermuda grass accessions from China and of 22 Bermuda grass cultivars from China, Australia, and the USA. There was a rich diversity in asexual reproduce of Bermuda grass from both China and overseas. The coefficient of variation was from 35.10%-82.31% (average 57.26%), and that of domestic accessions was higher than that of overseas cultivars. Vertical growth rates of domestic accessions and breeding materials were significantly lower than those of overseas cultivars. There were significant correlations (maximal correlation coefficient of 0.957) among asexual reproduction-related characteristics of Bermuda grass in both domestic and overseas cultivars with the exception of vertical growth rate. Based on five characteristics, SPSS 13.0 was used to divide Bermuda grass accessions into three asexual reproduction types: rapid propagation of stolons, intermediate and low-speed reproduction of stolons. The rapid propagation of stolons type are domestic accessions.

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