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['https://openalex.org/W4308456728', 'https://openalex.org/W4241308152', 'https://openalex.org/W2984770644', 'https://openalex.org/W2391890310', 'https://openalex.org/W2386472448', 'https://openalex.org/W2368351496', 'https://openalex.org/W2358634658', 'https://openalex.org/W2358367883', 'https://openalex.org/W2348741571', 'https://openalex.org/W2347693508'], 'abstract_inverted_index': {'土中から発掘される植物由来のケイ酸体(プラントオパール)によって過去の植生や栽培種の種類や量を推定するプラントオパール分析をイネのindicaおよびjaponicaの起源や伝播経路の研究に応用するための基礎として,ケイ酸体の形および葉中の密度の品種間変異を調査した.実験にはアジア各地の栽培イネ品種96を供試し,機動細胞ケイ酸体の形状および密度の品種間変異を調査した.機動細胞ケイ酸体の形状の変異は,縦長,横長,側長(厚み)および尖りの具合いを示すパラメーターの4形質を組合せることによってよく表現された.典型的なindica品種は,丸く,薄く,小型のケイ酸体(α型ケイ酸体)を,また典型的なjappnica品種はこれとは逆の尖った,厚い,大型のケイ酸体(β型ケイ酸体)をもつ傾向を示した.判別分析によって求めた機動細胞ケイ酸体の形状を表わすスコア(Z1)値と,indica-jappnicaの変異を表わすスコア(Z3)の間には有意な負の相関関係が認められた.Z': [0], '1値について中間型と思われる.24品種(-0.5≦Z': [1], '1≦0.5,25%)の判定を保留すると,Z1-0.5のα型ケイ酸体をもつ39品種のうち36品種(92%)はindica,またZO.5のβ型ケイ酸体をもつ33品種のうち31品種(94%)はjappnicaであった.jappnicaの2品種群である温帯型jappnicaと熱帯型jappnicaの機動細胞ケイ酸体の形状にはわずかながら差異が認められた.これらの結果を利用すればイネ由来のプラントオパールの形状によってそれがjappnica由来のものかindica由来のものかが推定できよう.またjappnica由来のものならば,典型的な形状を示すものについては温帯jappnica由来か熱帯jappnica由来かの推定も可能となるかも知れない.将来この原理を応用して,indicaおよびjappnicaの起源や伝播経路を,今までより正確に推定できることが期待される.': [2]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2012156304', 'counts_by_year': [{'year': 2022, 'cited_by_count': 1}, {'year': 2018, 'cited_by_count': 1}, {'year': 2017, 'cited_by_count': 1}, {'year': 2016, 'cited_by_count': 3}, {'year': 2015, 'cited_by_count': 2}], 'updated_date': '2024-09-12T04:08:51.145348', 'created_date': '2016-06-24'}