| 大穗型籼稻品种根系性状的基本特点 |
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| 引用本文： | 董桂春,李进前,田昊,于小凤,张彪,张传胜,张岳芳,黄建晔,王余龙.大穗型籼稻品种根系性状的基本特点[J].作物学报,1963,35(7):1357-1363. |
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| 作者姓名： | 董桂春 李进前 田昊 于小凤 张彪 张传胜 张岳芳 黄建晔 王余龙 |
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| 作者单位： | 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 |
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| 基金项目： | 本研究由国家自然科学基金（30270777和30771275）资助。 |
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| 摘 要： | 在群体水培条件下，以国内、外不同年代育成的常规籼稻代表品种(2001年为88个、2002年为122个)为材料，测定干物重(包括根系)、根系性状和根系活性、产量及其构成因素等，采用组内最小平方和的动态聚类方法将供试品种按单穗重从低到高依次分为A、B、C、D、E、F 6类，研究各类品种根系的基本特点。结果表明，供试品种间单穗重的差异很大(两年分别相差493%和764%)，A、B、C、D、E、F类品种的平均单穗重，2001年分别为0.99、1.56、2.00、2.54、3.16、4.08 g，2002年分别为0.82、1.38、1.80、2.38、3.04、4.29 g。大穗型品种每株不定根总长、每株根干重、每株根系总吸收面积显著大于小穗型品种。大穗型品种每穗根数、每穗根重、每穗根长、每穗根系总吸收面积、每穗根系活跃吸收面积、每穗根系活性显著优于小穗型品种。多元回归分析表明，显著影响单穗重的主要根系性状是每穗根长、每穗根重、抽穗期冠根比、每穗根系总活力，决定系数为0.620~0.639。随着每穗根长、每穗根重、抽穗期冠根比、每穗根系总活力提高单穗重显著增加。
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| 关 键 词： | 籼稻 品种 穗重 根系性状 根系活性 |
| 收稿时间： | 2008-10-21 |
| 修稿时间： | 2009-02-18 |
Characteristics of Roots Traits in Conventional Indica Rice Cultivars with Large-Panicle |
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| Institution: | Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Key Laboratory of Crop Physiology,Ecology and Cultivation in Middle and Lower Reaches of Yangtze River of Ministry of Agriculture,Yanghzou University,Yangzhou 225009,China |
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| Abstract: | Eighty-eight and one hundred and twenty two conventional indica rice cultivars were solution-cultured in 2001 and 2002, respectively. Dry matter weight (including root system, culm and sheath, leaves, panicle), root traits, root physiological activity, yield and its components were measured. The tested rice cultivars were classified into six types (i.e. A, B, C, D, E, and F, A was the lowest, and F was the highest) based on their panicle weight level by the MinSSw method, to study their differences of root traits, root physiological activity. Difference of panicle weight of the cultivars used in this study was very large (the ratio of the maximal panicle weight to the minimum panicle weight in 2001 and 2002 were 493% and 764%, respectively), the average of panicle weight was 0.99, 1.56, 2.00, 2.54, 3.16, and 4.08 grams per panicle in 2001, and 0.82, 1.38, 1.80, 2.38, 3.04, and 4.29 grams per paniclein 2002, respectively. Root dry weight per plant, total length of adventitious roots per plant, and total root absorption area per plant in large-panicle type cultivars higher than those in small-panicle type cultivars. Number of adventitious roots per panicle, root dry weight per panicle, length of adventitious roots per panicle, total root absorption area per panicle, root active absorption area per panicle, and root activity per panicle in large-panicle type cultivars were higher than those in small-panicle type cultivars. Polynomial regression analysis showed that panicle weight was significantly influenced by length of adventitious roots per panicle, root dry weight per panicle, ratio of shoot to root at heading stage, root activity per panicle, and the determinant coefficient ranged from 0.620 to 0.639. Larger panicle weight could be reached by increasing length of adventitious roots per panicle, root dry weight per panicle, ratio of shoot to root at heading stage, root activity per panicle. |
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| Keywords: | Conventional indica rice Cultivars Panicle weight Root traits Root physiological activity |
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