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- W2749980445 abstract "Publisher Summary This chapter discusses Euoenothera (Onagra) as found in North America or as represented by European derivatives of North American origin. Oenothera comprises fifteen subgenera, of which only the largest has been extensively studied cytogenetically. The genus is native to the western hemisphere but has been extensively introduced into other areas of the world. The first reference to Oenothera in Europe is that of Prosperus Alpinus of Padua. It has become widely distributed throughout Europe where it constitutes an important element in the flora. To summarize this situation, most Oenotheras are “complex-heterozygotes.” Each race has two different complexes or permanent genomes. This results from the inclusion of all genes within a single linkage group for which the plant is heterozygous, the presence of one or more lethals in each genome and self pollination. Hybrids derived from the crossing of true-breeding complex-heterozygotes have two or more linkage groups. The prevalence of translocations that have brought about the widespread occurrence of structural hybridity naturally tends to focus interest upon chromosome structure in Oenothera. One of the striking features of Oenothera genetics is the relative paucity of detectable crossing-over. The genes that show crossing-over in the races lie in the transitional zone between the regularly pairing end segments and the proximal segments in which the genes that differentiate the complexes lie." @default.
- W2749980445 created "2017-08-31" @default.
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- W2749980445 date "1962-01-01" @default.
- W2749980445 modified "2023-09-23" @default.
- W2749980445 title "The cytogenetics of Oenothera." @default.
- W2749980445 hasPublicationYear "1962" @default.
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