Application of ratoon traits obtained by higher cutting for estimation of percentage of ripened grains in rice plants

( Max 2000 Items )
URI http://shark.lib.kagawa-u.ac.jp/kuir/metadata/3355
Title
Application of ratoon traits obtained by higher cutting for estimation of percentage of ripened grains in rice plants
Title Alternative
イネの登熟歩合推定のための高刈りによる再生茎形質の利用
File
Description

The effect of the cutting height on the relationship between ratoon traits and the percentage of ripened grains of the uncut plant was investigated using 30 rice cultivars grown in a randomized block design with 2 replications. Variations from year to year of ratoon traits were also investigated. The plant was cut on the 10th day after heading at four different heights, i. e., at ground levcl, and at 5, 10 and 20cm above the ground. The percentage of missing hills increased as the cutting height decreased. The percentage of ratoon tillers and the ratoon height increased with the increase of the cutting height. The relationship between ratoon traits and the percentage of ripened grains of the uncut plant varied with the cutting height. Increased. cutting heights gave significantly higher values for the correlation coefficients between the percentage of ratoon tillers and the percentage of ripened grains. However, the ratoon height was not significantiy correlated with the percentage of ripened grains regardless of the cutting height. The year-to-year correlation of ratoon traits was significant and positive, although growth was different. The correlation coefficient was largel for the percentge of ratoon tillers than for the ratoon height. This suggests that the percentage of ratoon tiliers obtained by cutting at 10 or 20cm above the ground may reflect the percentage of ripened grains of the uncut plant.

稲体の地上部を生育後期に壇除したときに見られる再生茎の形質が非塊除株の姪熟・歩合の推定に利用しうることをすでに報告した.しかしたがら再生茎の特例三は地上部の刈取り高さによって変異すると一思、われる.そこで再生茎形質と豊熟歩合との関係に及ぼす刈取り高さの影耕を明らかにしようとした.また蛙報の結果を加え,再生茎砂質の年次問変異についても検討した. 水稲30品種を供試L,出穂後10日に地際より0,5,10および20cmで地上部を刈取り,刈取り後40日に再生茎率((再生株の茎数/非勇除株の茎数)×100)および再生草丈(再生株における刈取り面からの草丈)を調査した・非勇除株の豊熟歩合を成熟期に調べた.

Author
著者 Ichii Masahiko
著者(ヨミ) イチイ マサヒコ
著者(別表記) 一井 真比古
著者 Ogaya Noriyoshi
著者(ヨミ) オガヤ ノリヨシ
著者(別表記) 鋸谷 智吉
Publication Title
育種学雑誌
Volume
35
Issue
3
Start Page
311
End Page
316
Publisher
日本育種学会
Published Date
19850901
ISSN
0536-3683
NCID
AN00013906
Resource Type
Journal Article
Language
eng
Relation URL(isReplacedBy)
http://ci.nii.ac.jp/naid/110001810919
Rights
日本育種学会
本文データは学協会の許諾に基づきCiNiiから複製したものである
Text Version
publisher
Set
香川大学
Copyright (C) 2009 Kagawa University All rights reserved.