…Most wild species of the Convolvulus genus have 30 chromosomes, so they are considered to be hexaploid. It is assumed that sweet potatoes originated from wild hexaploid species, and one such wild ancestor, Ipomoea trifida G.Don, which does not have enlarged roots, has been discovered in Central America (Mexico). However, this species not only does not produce tubers, but also has the characteristic of having vine-like stems that wrap around other objects, making it different from sweet potatoes. … *Some of the terminology that mentions "Ipomoea trifida" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…大部分のヒルガオ属の野生種染色体数は30本であるので,六倍体と考えられる。サツマイモは野生六倍体種から起源したと推定されるが,そのような野生祖先種の一つとして根が肥大しないイポメア・トリフィダI.trifida G.Donが中央アメリカ(メキシコ)で発見されている。しかし,この種はいもができないだけでなく,つる性の茎は他物に巻きつくなどの特徴があり,サツマイモとは異なっている。… ※「イポメア・トリフィダ」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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