Autumn sowing - Autumn sowing

...This is a growth habit seen in some varieties of wheat, rapeseed, radish, etc., in which flower buds form, flower, and fruit even if the young plant is not exposed to low temperatures. On the other hand, if the plant is not exposed to low temperatures at that time, the stems and leaves continue to grow, and the formation of flower buds, flowering, and fruiting are delayed. This growth habit is called winter habit. Varieties with the former growth habit are called spring sown types, and varieties with the latter are called autumn sown types. The difference between spring sown types and autumn sown types is actually a matter of degree, and the seeds of each variety are sown from autumn to spring, and the changes in the timing of heading and bolting are used to divide them into seven classes for convenience, and each class is displayed as the degree of spring sown type (or autumn sown type) of each variety. ...

*Some of the terminology that refers to "autumn sowing" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…ムギ類，ナタネ，ダイコンなどの一部の品種にみられるもので，幼植物のときに低温にあわなくても，花芽を形成し開花，結実するような発育習性をいう。その逆にその時代に低温にあわないと，いつまでも茎葉ばかりが繁茂し，花芽の形成や開花，結実が遅れるような発育習性を秋まき性winter habitという。前者のような発育習性をもつ品種を春まき型，後者の品種を秋まき型と呼ぶ。春まき型であるか秋まき型であるかの差は実際上は程度の問題で，秋から春にかけて各品種の種子をまき，出穂，抽だいの時期の変化などを参考にして便宜的に七つの階級に分け，それぞれ各品種の春まき性(あるいは秋まき性)程度として表示している。…

※「秋播性」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