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EXCEPTIONAL GENETIC DIVERGENCE OF NORTHERN FLINT CORN |
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| Authors: | John F Doebley Maj or M Goodman Charles W Stuber |
| Institution: | 1. Department of Biology, Texas A&M University, College Station, Texas, 77843;2. Department of Biology, Texas A&M University, College Station, Texas, 77843
Department of Crop Science, North Carolina State University, Raleigh, North Carolina, 27695;3. Department of Biology, Texas A&M University, College Station, Texas, 77843 Department of Genetics and USDA-ARS, North Carolina State University, Raleigh, North Carolina, 27695 |
| Abstract: | Isozyme analysis of 18 Northern Flint populations supports the previously published hypothesis that Northern Flint was derived from maize races of the southwestern U.S. and northwestern Mexico. Isozyme data also show that during its short evolutionary history (approx. 1,000 yr) Northern Flint obtained a degree of genetic differentiation from other North American maize landraces more typical of a separate species than of landraces of the same cultigen. Genetic drift, changes in selection pressure associated with movement into a new environment, and reproductive isolation from other maize races may have contributed to the genetic dissimilarity of Northern Flint. |
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