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Cucurbita fraterna : ウィキペディア英語版 | Cucurbita fraterna
''Cucurbita fraterna'', also known as ''Cucurbita pepo'' subsp. ''fraterna'', is a mesophyte plant species of the genus ''Cucurbita''. It is native to Tamaulipas and Nuevo León, Mexico. It has not been domesticated.〔 It is the progenitor and nearest relative of the domesticated species ''Cucurbita pepo'' and wild ''C. pepo'' is still found in the same areas as ''C. fraterna''. It was formally described by Liberty Hyde Bailey in 1943, in ''Gentes Herbarum''.〔 Unlike most wild ''Cucurbita'', some fruit specimens of ''C. fraterna'' have been found that were not bitter. Its usual habitat is dry upland scrub areas. It blooms in September and fruits ripen in December.〔 The debate about the relationship of ''C. pepo'', ''C. fraterna'', and ''C. texana'' have been going on since at least 1857. ''C. pepo'' has more similarities to ''C. fraterna'' than it does to ''Cucurbita texana'' which is also claimed to be an ancestor of ''C. pepo''. Their isozymes are very similar. ''C. fraterna'' shares alleles with ''C. pepo'' at all 25 studied loci, indicating ''C. fraterna'' is ''C. pepos nearest relative.〔 ''C. pepo'' is most likely an early domesticated form of ''C. fraterna''. It crosses well with both ''C. pepo'' and ''C. texana''. ''C. pepo'' could be a compilospecies of ''C. fraterna'' and ''C. texana'', which appear to be two species that were originally separate. Based on genetic allele analysis, there are two distinct groups within ''C. pepo'': pumpkin, calabaza, criolla, and marrow squash are in one, and ornamental gourds, crookneck squash, acorn squash, pattypan squash, and a few others are in the other. ''C. fraterna'' is genetically closer to the first group and ''C. texana'' is genetically closer to the second group. == References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Cucurbita fraterna」の詳細全文を読む
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