中国水稻科学2009，Vol.23Issue(6)：628-632,5.DOI:10.3969/j.issn.1001-7216.2009.06.11
优质籼稻桂华占、八桂香花后干物质积累与转运及灌浆的动态特征
Characteristics of Post-anthesis Dry Matter Accumulation, Translocation and Grain Filling of High Quality indica Rice Varieties Baguixiang and Guihuazhan
摘要
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 Zhenguia(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.关键词
优质籼稻/干物质积累/干物质运转/籽粒生长/动态特征Key words
high-quality indica rice/dry matter accumulation/dry matter translocation/grain growth/dynamic character-istics分类
农业科技引用本文复制引用
胡钧铭,曾可,江立庚,莫润秀,韦善清,王勇,刘开强,周佳民,秦华东,梁天锋..优质籼稻桂华占、八桂香花后干物质积累与转运及灌浆的动态特征[J].中国水稻科学,2009,23(6):628-632,5.基金项目
国家自然科学基金资助项目(30560066) （30560066）
广西研究生教育创新计划资助项目(2007105930901M75). （2007105930901M75）
