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The Journal of Heredity 1990:81(5):351-358
© 1990 The American Genetic Association 81:351-358

research-article

Genetics of Allozyme Variation in Cuphea laminuligera and C. Iutea

S. K. Krueger, and S. J. Knapp

From the Department of Crop Science, Oregon State University Corvallis

Address reprint requests to S. J. Knapp, Department of Crop Science, Oregon State University, Corvaltis, OR 97331.

Abstract

Cuphea laminuligera Koehne and C. lutea Rose in Koehne are undomesticated species that have potential as new oilseed crops. Genetic markers have not been described for these species. We attempted to survey these species for allozyme variation and analyze the segregation and linkage of polymorphic loci in several F2 populations. We analyzed allozyme variation among 11 F2 populations of C. laminuligera and one F2 population of C. lutea. Both species were assayed for aconitase (ACO), diaphorase (DIA), esterase (EST), fluorescent esterase (FES), glutamic-ox-aloacetate transaminase (GOT), malate dehydrogenase (MDH), menadione reductase (MNR), 6-phosphogluconic dehydrogenase (PGD), phosphoglucose isomerase (PGI), and shikimate dehydrogenase (SKD) activity. C. laminuligera was also assayed for phosphoglucomutase (PGM) activity. We observed 14 polymorphic loci and two monomorphic loci in C. laminuligera. Variation was observed within and between parental populations. Observed segregation ratios were generally not significantly different (P > .05) from expected ratios. We observed three polymorphic loci and at least 10 monomorphic loci in C. lutea. We found no within-population variation in parental populations of C. lutea. Observed segregation ratios were not significantly different from expected ratios, and linkage was not detected.


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