中国水稻科学

中国水稻科学 ›› 2013, Vol. 27 ›› Issue (4): 398-404.DOI: 10.3969/j.issn.1001-7216.2013.04.009

• 研究报告 • 上一篇    下一篇

生育期与粳稻品种根系性状的关系分析

董桂春,陈琛,王熠,仲军,袁秋,梅羊彬,于小风,李进前,田昊,张燕,蒋亚明,孟令响,王余龙*   

  1. 扬州大学 江苏省作物遗传生理重点实验室/农业部长江中下游作物生理生态与栽培重点开放实验室， 江苏 扬州225009;
  • 收稿日期:2012-10-22 修回日期:2012-11-23 出版日期:2013-07-10 发布日期:2013-07-10
  • 通讯作者: 王余龙*
  • 基金资助:

    国家自然科学基金资助项目（30971728和30771275）；江苏省高校自然科学重大基础研究项目（09KJA210001）。

Relation Between Root Traits and Growth Duration in  japonica  Rice Cultivars

DONG Guichun, CHEN Chen, WANG Yi, ZHONG Jun, YUAN Qiumei, YANG Bing, YU Xiaofeng, LI Jinqian, TIAN Hao, ZHANG Yan, JIANG Yaming, MENG Lingxiang, WANG Yulong*   

  1. Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/ Key Laboratory of Crop Physiology, Ecology and Cultivation in Middle and Lower Reaches of Yangtse River of Ministry of Agriculture， Yangzhou Universiey, Yangzhou 225009， China;
  • Received:2012-10-22 Revised:2012-11-23 Online:2013-07-10 Published:2013-07-10
  • Contact: WANG Yulong*

PDF

摘要： 在群体水培条件下，以94个常规粳稻品种为材料，测定其生育期、各器官干物质量和根系性状，采用组内最小平方和动态聚类方法将供试品种按生育期(播种到抽穗日数)从低到高依次分为A、B、C、D、E、F 六类，研究各类品种根系性状的差异及根系性状与生育期的关系。结果表明，随着生育期延长，单株不定根数无显著变化，单株根干物质量、单株不定根总长、最长根长总体呈增加或显著增加，单株根系总吸收面积、单株根系活跃吸收面积、单株根系活力呈总体增加或先增后降的趋势，年度间有差异，单穗根系性状也有相似的趋势；生育期长的品种单株或单穗根系性状表现出不定根数居中，根干物质量大，不定根总长长，根系总吸收面积、单株根系活跃吸收面积、根系活力大或中等，单株最长根长较长的特点。单株或单穗根系性状中除不定根数在品种间的差异不显著外，其他性状在品种间的差异均达显著或极显著水平；生育期的长短显著影响粳稻品种单条不定根长、单条不定根干物质量，但对单条不定根粗影响较小；生育期长的粳稻品种多数单株根系性状具有明显的优势，这可能与其单穗根系性状、单条不定根的根长、根干物质量等性状的改善有关。

关键词: 粳型水稻, 品种, 生育期, 根系性状

Abstract: To investigate the relation between root traits and growth duration in japonica rice cultivars, a total of 94 conventional japonica rice varieties were solutioncultured in 2008 and 2009, respectively, and growth duration (GD), dry matter weight of different part in rice plant, and root related traits were measured for each cultivar. Based on GD, the rice varieties were clustered, by MinSSw method, into six types (namely A, B, C, D, E, and F in the alignment from low to high). Then the differences of root related traits for various types were analyzed. Results showed that with prolonging GD, no significant change in the numbers of adventitious roots was observed, while root dry weight, total length of adventitious roots per plant and the maximum root length increased or significantly increased. In general, total/active root absorption area and root activity per plant increased or increased at first then decreased with the elongation of GD. Similar but yearrelated trend was observed in root traits on panicle basis. The cultivars with longer GD had the medium numbers of adventitious roots, higher root dry weight, longer total/maximum length of adventitious roots, higher root total/active absorption area and higher or medium root activity, calculated on both of plant and panicle basis. Except for number of adventitious roots, the tested traits on the basis of plant or panicle differed significantly  among cultivars. The length and weight of single adventitious root were significantly affected by GD, while the single root diameter was not affected by GD. The japonica rice varieties with longer GD had obvious advantages on the most of root traits per plant, due to the improvement of root traits including root length and root dry weight on a basis of panicle or single adventitious root. 

Key words: japonica rice, cultivar, growth duration, root trait

中图分类号: