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- W2256592735 abstract "Hybrid vigor in plants has long been noted, and probably the first suggestion that it be exploited in vegetables was by Hayes and Jones (1916) in cucumber. F1 hybrid eggplants were commercially used in Japan before 1925 (Kakizaki 1930). Demonstration of the value of hybrids in corn in the early 1920’s prompted a few exploratory studies in other crops, but methods of its application to field scale operations were first proposed in 1932, using the self-incompatibility system in cabbage (Pearson 1932), and in 1943 using the cytoplasmic male sterility mechanism in onion (Jones and Clarke 1943). Programs to exploit the sex systems to produce hybrids were developed in spinach (monoecious forms), cucumber (genetic controlled), squash (response to chemical), and carrot (cytoplasmic male sterility). Identification and measurement of the expression of heterosis — the percent increase over the mid parent value — of the components of economic yield have been attempted. Educated guesses as to the value of parental combinations have been the bases used in choice of parents. Different studies of the same crop often differ when analyzed for heterosis effects because the number, identity, and effectiveness of the multiple gene systems involved vary in the varieties used as parents. Diallel studies can be used to locate sources of the desirable additive factors, and guide the development of more efficient hybrids." @default.
- W2256592735 created "2016-06-24" @default.
- W2256592735 creator A5003338953 @default.
- W2256592735 date "1983-01-01" @default.
- W2256592735 modified "2023-09-25" @default.
- W2256592735 title "Heterosis in Vegetable Crops" @default.
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- W2256592735 doi "https://doi.org/10.1007/978-3-642-81977-3_6" @default.
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