Wedge wheat - Wedge wheat

…
[origin]
The botanical origins of the four wheat groups mentioned above have been revealed to be the result of hybridization between diploid species with different genomes, followed by the doubling of chromosome number, resulting in the formation of allopolyploid species, mainly through genetic, comparative morphological and comparative biochemical research conducted over the past 50 years. That is, although there are still many unknowns about the diploid wheat T. dicoccoides and the timophebian wheat T. araraticum , they are thought to have originated from a hybridization between the wild elate wheat T. boeoticum and the closely related diploid species Aeqilops speltoides Tausch, followed by the doubling of chromosome number, and it has been found that common wheat is the result of a hybridization between a cultivated diploid wheat species and a closely related wild diploid species, Aeqilops squarrosa L., followed by the doubling of chromosome number. The cultivated elapid wheat species Triticum monococcum was domesticated from the wild Triticum boeoticum , the cultivated dwarf wheat species Triticum dicoccoides from the wild dwarf wheat species Triticum timopheevi from the wild Triticum araraticum .

*Some of the terminology explanations that refer to "wedge wheat" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…
［起源］
　前に述べたコムギ4群の植物学的起源は，おもに過去50年にわたる遺伝学的研究，比較形態学的研究，比較生化学的研究などによって，異なるゲノムをもつ二倍種の交雑とそれに伴う染色体数の倍加による異質倍数種形成によることが明らかになった。すなわち，二粒系コムギのT.dicoccoidesおよびチモフェービ系コムギのT.araraticumはまだ不明な点も多いが，野生一粒系コムギのT.boeoticumと近縁二倍種のクサビコムギAeqilops speltoides Tauschの交雑とその染色体数倍加に由来すると考えられ，普通系コムギは二粒系コムギの栽培種と近縁の野生二倍種であるタルホコムギA.squarrosa L.の交雑とその染色体数倍加によることがわかった。　一粒系コムギの栽培種T.monococcumは，野生のT.boeoticumから，栽培二粒系コムギは野生二粒系コムギのT.dicoccoidesから，また栽培種のチモフェービコムギT.timopheeviは野生のT.araraticumから，それぞれ栽培化されて生じたものである。…

※「クサビコムギ」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