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Acta Agron Sin ›› 2008, Vol. 34 ›› Issue (06): 1104-1108.doi: 10.3724/SP.J.1006.2008.01104

• RESEARCH NOTES • Previous Articles    

Effects of Exogenous Chromosomes on Root Characteristics in Triticum aestivum-Lophopyrum elongatum with Chinese Spring Background

PENG Yuan-Ying1,SONG Hui-Xing1,ZHONG Zhang-Cheng2*   

  1. 1 School of Life Science, Qufu Normal University, Qufu 273165, Shandong; 2 School of Life Science, Southwest University / Key Laboratory of
    Eco-nvironments in Three Gorges Reservoir Region, Chongqing 400715, China
  • Received:2007-09-19 Revised:1900-01-01 Online:2008-06-12 Published:2008-06-12
  • Contact: ZHONG Zhang-Cheng

Abstract: The effects of exogenous chromosomes on root morphology were studied with the disomic substitution series of Triticum aestivum L. cv. Chinese Spring-Lophopyrum elongatum (Host) A. Löve. Scanner-based image analysis was used to investigate total root length, surface area, mean diameter, and number of root per plant. The fractal dimensions of young root systems were also calculated. Compared with Chinese Spring, there were fewer roots per plant in 3Ee, 5Ee, and 7Ee substitutions and larger total root length and surface area in 1Ee, 2Ee, and 4Ee substitutions, indicating that genes associate with the above characteristics on the corresponding chromosomes respectively. But the genes controlling average diameter were found on every chromosome of L. elongatum. The fractal dimension of seedling root systems was significantly correlated with the above 4 root parameters included in root growth models (0.757**≤r≤0.845**). It is suggested that the fractal dimension can be used as an integrated index for summarizing root morphological characteristics of Chinese Spring and its substitutions after further studies.

Key words: Wheat, Lophopyrum elongatum, Exogenous chromosome, Substitution, Root characteristics

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