Basic Study on Super Panicle Weight Type Varieties in Rice

水稻超粒重型品种的基础研究

基本信息

批准号：
11695079
负责人：
YAMAMOTO Yoshinori
金额：
$ 1.47万
依托单位：
Kochi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

This study was carried out to clarify the characteristics of determining processes of number of spikelets, sink capacity and grain-filling in super panicle weight type (SPWT) varieties in rice. The results obtained were summarized as follows ;1. The high yielding semidwarf and intermediate culmed indica SPWT varieties had higher sink capacity due to higher both components, i.e., number of spikelets per m^2 and 1 grain volume (weight) and good transportation system of carbohydrates from the vegetative organs to the panicle.2. The final grain weight at the different positions in a panicle was mainly determined by the grain-filling rate compared with the grain filling period, irrespective of large differences in grain size among varieties including SPWT.3. With increasing amount of nitrogen application at various stage from transplanting to heading decreased the hull size of SPWT varieties and resulted in lighter grain weight. The unhulled grains with heavier specific weight showed heavier grain weight, and the grain weight closely and positively associated with the volume of brown rice which was mainly related to the thickness.4. The percentage of ripened grains and 1000-grain weight of a SPWT variety were strongly and positively correlated with the root activity (α -naphthylamine oxidizing activity) per grain during grain-filling period, and the promotion of these characters with increasing the root activity were greater in the inferior spikelets located on the lower part of a panicle.

进行这项研究是为了阐明确定大米中超级圆锥体重量类型（SPWT）变化的尖峰数量，下沉容量和谷物填充的过程的特征。获得的结果总结如下; 1。由于两个组件的较高，即每M^2和1晶粒体积（重量）的尖峰数量较高，因此高屈服的半战和中间culdiate Culmed Indica Spwt变化具有较高的下沉量，以及从营养器官到圆锥花序的碳水化合物的良好运输系统。2。与谷物填充期相比，圆锥花序中不同位置的最终晶粒重量主要取决于晶粒填充速率，而不论SPWT.3在内的变化之间的晶粒尺寸差异很大。随着从移植到标题的各个阶段的氮施用量的增加，SPWT品种的船体尺寸降低了，并导致晶粒重量较轻。较重的特异性谷物显示出较重的谷物重量，谷物的重量与糙米的体积紧密相关，这主要与厚度有关。4。在谷物填充期间，SPWT品种的成熟晶粒的百分比与每种晶粒的根活性（α-非萘胺氧化活性）密切相关，并且在泛粒下部的下尖峰中，促进这些角色的促进这些角色的促进较高。