Chinese Journal OF Rice Science

Chinese Journal OF Rice Science >

2009 , Vol. 23 >Issue 6: 639 - 644

DOI: https://doi.org/10.3969/j.issn.1001-7216.2009.06.13

研究报告

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

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  • 1Key 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 University, Yangzhou 225009, China； 2Bureau of Agricultural Machinery Management of Jiangsu Province, Nanjing 210024, China; 3Institute of Agricultural Resources and Environments, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; *Corresponding author, E-mail: ylwang@yzu.edu.cn

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2009-11-10

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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

Cite this article

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, 2009 , 23(6) : 639 -644 . DOI: 10.3969/j.issn.1001-7216.2009.06.13

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