Ei - Ei

Japanese: 頴 - えい
Ei - Ei

Rice is an annual plant of the grass family that is one of the world's three major cereal grains, along with wheat and corn. Its grain, rice, provides the staple food for half of the world's population. In Japan, it has been an important crop that has been positioned at the center of agriculture since ancient times.
[Origin and spread]
More than 20 species of wild rice (genus Oryza) grow naturally in the wetlands of the world's tropical and warm temperate zones. Various theories have been proposed for the classification of the Oryza genus since ancient times, but the most widely accepted view is that it is divided into four sections, Oryzae , Ridleyanae , Granulatae , and Schlechterianae , based on the number of chromosomes and genome analysis.

*Some of the terminology explanations that mention "鯴" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…コムギ,トウモロコシとならんで世界の三大穀物の一つに数えられるイネ科の一年草で,その穀粒である米は,世界人口の半数におよぶ人間の主食をまかなっている。日本では古来,農業の中心に位置づけられてきた重要な作物である。
【起源と伝播】
 世界の熱帯から暖温帯にかけての湿地には,二十数種におよぶ野生稲(イネ属植物)が自生している。イネ属の分類に関しては古くから諸説が提出されているが,染色体数やゲノム分析により,Oryzae節,Ridleyanae節,Granulatae節およびSchlechterianae節の4節に分ける見方が有力である。…

※「頴」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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