Characteristics  of  Dry Matter Accumulation and Distribution  in Conventional  indica  Rice  Cultivars with Different Sink  Potentials

doi:10.3969/j.issn.1001-7216.2009.06.13

Abstract

Abstract: To investigate the characteristics of dry matter accumulation and distribution in conventional indica rice (Oryza sativa L.) cultivars with various sink potentials(SPs), a total of 88 and 122 conventional indica rice cultivars were solutioncultured in 2001 and 2002, respectively. These cultivars were classified into six types based on their SPs by the MinSSw method. Dry matter weight (including root, culm and sheath, leaves and panicle), yield and its components were measured. A significant difference in SP among the cultivars was found, with the ratios of the maximal SP to the minimum SP being 4.26 times and 8.18 times in 2001 and 2002, respectively. The averages of SPs were 426.37, 642.53, 770.96, 903.73, 1064.32, and 121390 g/m2 in 2001, and 35936, 57411, 76498, 96243, 120011, and 145559 g/m2 in 2002, respectively. The cultivars with largeSP showed superiority in biomass, dry matter accumulation during heading, grain filling and maturing. The sink potential per unit dry matter weight during heading was higher in the cultivars with large SP, whereas lower during grain filling, compared with the cultivars with small SP. The lower ratios of dry matter distribution to root, culm and sheath and leaf, and to panicle during maturing were found in the cultivars with large SP than those with small SP. The cultivars with large SP showed higher harvest index. The contribution of biomass to SP was significantly greater than that of harvest index to SP. The contribution of dry matter weight and sink potential per unit dry matter weight to SP was significantly greater during heading than during grain filling.

Key words: conventional indica rice, sink potential, dry matter accumulation, dry matter distribution

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，测定干物质量（包括根系）、产量及其构成因素等，采用组内最小平方和动态聚类方法将供试品种按库容量从低到高依次分为A、B、C、D、E、F 6类，研究了各类品种物质生产与分配的基本特点。结果表明： 1）供试品种间库容量的差异很大，库容量最大的品种是最小品种的426倍(2001)和818倍（2002）。A、B、C、D、E、F类品种的平均库容量，2001年分别为42637、64253、77096、90373、106432、121390 g/m2，2002年分别为35936、57411、76498、96243、120011、145559 g/m2； 2）大库容类型品种生物产量、抽穗前干物质生产量、结实期干物质生产量显著大于小库容类型品种； 3）大库容类型品种成熟期分配到根系、茎鞘叶中的干物质比例较小，分配到穗中的干物质比例较大，经济系数较高；4）大库容类型品种抽穗期单位干物质库容量较大，结实期单位干物质库容量较小；5）从品种演变角度来看，生物产量对库容量的影响大于经济系数，抽穗期干物质生产量、抽穗期干物质形成库容的效率对库容量的作用大于结实期同类指标。

关键词: 常规籼稻, 库容量, 物质生产, 物质分配

DONG Gui-chun,LI Jin-qian,YU Xiao-feng,ZHOU Juan, TIAN Hao,ZHANG Yan,ZHANG Chuan-sheng,ZHANG Yue-fang,WANG Yulong. Characteristics of Dry Matter Accumulation and Distribution in Conventional indica Rice Cultivars with Different Sink Potentials[J]. Chinese Journal of Rice Science, DOI: 10.3969/j.issn.1001-7216.2009.06.13 .

董桂春,李进前,于小凤,周娟,田昊,张燕,张传胜张岳芳王余龙,. 不同库容量常规籼稻品种物质生产与分配的基本特征[J]. 中国水稻科学, DOI: 10.3969/j.issn.1001-7216.2009.06.13 .

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Characteristics of Dry Matter Accumulation and Distribution in Conventional indica Rice Cultivars with Different Sink Potentials

不同库容量常规籼稻品种物质生产与分配的基本特征

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