Received October 16, 1970 SE of hybrid vigor is of great importance in terms of present-day agricultural production. For example GARDNER (1968) states: ". . . Development and use of has been the most important practical achievement of genetics so far. The monetary value of the increase in corn production due to use of for a single year has been estimated to exceed the total cost of federal research for plant improvement since 1900." Even though the importance of hybrid vigor is well recognized, the underlying phenomenon, , remains an enigma of quantitative genetics. Various hypotheses have been developed on purely genetic grounds. In our laboratory we have adopted a different approach-one which vie as not entirely the result of genetic stimuli but rather as the result of the interaction between genetic and environmental stimuli. Such a view is not without precedent, as each of the studies in the following partial list have implicated the environment as a significant factor in the manifestation of : HANEY, GARTNER WILand SON 1953; GRIFFING 1954; LEWIS1954; BARNETT and COLEMAN 1960; SHANK and ADAMS 1960; GRIFFING and LANGRIDGE 1963; MCWILLIAM GRIFFING and (1962) far a detailed review of 1965; PEDERSON also see
Genetics – Genetics Society of America
Published: Jul 1, 1971
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