Chinese Journal OF Rice Science

Chinese Journal OF Rice Science >

2009 , Vol. 23 >Issue 5: 523 - 528

DOI: https://doi.org/10.3969/j.issn.10017216.2009.05.12

研究报告

Effects of Yield Components and Panicle Traits on Sink Potential in Conventional indica Rice

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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； 2Technique Instruction Center of Horticulture and Vegetables of Lianyungang City, Lianyungang 222001, China

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2009-09-10

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Abstract

Eightyeight and 122 conventional indica rice varieties were solutioncultured in 2001 and 2002, respectively, and tiller number dynamics, yield and its components, and panicle traits of these varieties were investigated. The tested rice varieties were classified into 6 types (i.e. A, B, C, D, E and F, A was the lowest, and F was the highest) based on their sink potential levels by the MinSSw method. Significant difference in sink potential (SP) among the varieties was found, the ratio of the maximal SP to the minimum in 2001 and 2002 were 426% and 817%, respectively. The average SP of the Ftype varieties were 18471%, 8893%, 5745%, 3432% and 1405% higher in 2001, and 30505%, 15354%, 9028%, 5124% and 21.29% higher in 2002, respectively than those of A, B, C, D, Etype varieties. With the enlarging SP, the grain yield increased significantly. Varieties belonging to large SP type had superiority in the number of panicles per unit area, number of spikelets per panicle and 1000grain weight. Varieties with larger SP showed longer panicle, higher spikelet density and higher number of primary and secondary rachis branches on panicles. The contributions of the number of spikelets and number of panicles per unit area to SP were similar, which was significantly greater than that of 1000grainweight to SP. The number of spikelets per panicle was more affected by spikelet density and panicle length than by number of secondary rachis branches per panicle and the ratio of primary rachis branch number per panicle to secondary rachis branch number per panicle.

Key words： indica rice; sink potential; yield components; panicle traits

Cite this article

DONG Gui-chun,LI Jin-qian,DONG Yan-ping,ZHOU Juan,TIAN Hao,YU Xiao-feng,ZHANG Chuan-sheng,ZHANG Yue-fang,WANG Yu-long . Effects of Yield Components and Panicle Traits on Sink Potential in Conventional indica Rice[J]. Chinese Journal OF Rice Science, 2009 , 23(5) : 523 -528 . DOI: 10.3969/j.issn.10017216.2009.05.12

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