<FONT face="Verdana">Characteristics of Postanthesis Dry Matter Accumulation, Translocation and Grain Filling of High Quality indica Rice Varieties Baguixiang and Guihuazhan</FONT>

HU Jun-ming,JIANG Li-geng*,MO Run-xiu,WEI Shan-qing,WANG Yong,LIU Kai-qiang,ZHOU Jia-min,QIN Hua-dong,LIANG Tian-feng,ZENG Ke

doi:10.3969/j.issn.1001-7216.2009.06.11

2009 , Vol. 23 >Issue 6: 628 - 632

DOI: https://doi.org/10.3969/j.issn.1001-7216.2009.06.11

研究报告

Characteristics of Postanthesis Dry Matter Accumulation, Translocation and Grain Filling of High Quality indica Rice Varieties Baguixiang and Guihuazhan

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Key Laboratory of Crop Cultivation and Farming System, Guangxi University, Nanning 530005, China; *Corresponding author, E-mail: jiang@gxu.edu.cn

Received date: 1900-01-01

Revised date: 1900-01-01

Online published: 2009-11-10

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Abstract

Field experiments were conducted to investigate dry matter accumulation and translocation and grain filling after flowering with three indica rice Baguixiang (superior quality rice), Guihuazhan(good quality rice) and Zhenguiai(inferior quality rice, CK) as materials in the spring and summer seasons in 2007. Results showed that high quality rice (including superior and good quality rice varieties Baguixiang and Guihuazhan) had greater dry weight of leaves and culm and sheath per culm, as well as higher dry matter translocation ratio and rate of leaf after heading. However, little difference was found in dry matter translocation in culm after heading between high quality rice and the control. According to the simulation of dry matter accumulation of grain in the three rice varieties with the Richards′ equation, high quality rice showed earlier initial filling, longer active filling period and lower maximum filling rate. About 1/5 to 1/3 of dry matter in grains were from leaf and culm dry matter redistribution after heading and the postanthesis dry matter contribution to grain in high quality rice was 1.5 to 2.0 times of the control. Correlation analyses indicated that grain growth was correlated with dry matter redistribution of leaf. It can be concluded that great leaf dry matter accumulation and redistribution were one of the most important reasons of high quality in rice.

Key words： highquality indica rice; dry matter accumulation; dry matter translocation; grain growth; dynamic characteristics

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HU Jun-ming,JIANG Li-geng*,MO Run-xiu,WEI Shan-qing,WANG Yong,LIU Kai-qiang,ZHOU Jia-min,QIN Hua-dong,LIANG Tian-feng,ZENG Ke . Characteristics of Postanthesis Dry Matter Accumulation, Translocation and Grain Filling of High Quality indica Rice Varieties Baguixiang and Guihuazhan[J]. Chinese Journal OF Rice Science, 2009 , 23(6) : 628 -632 . DOI: 10.3969/j.issn.1001-7216.2009.06.11

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