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Numerical analysis of allozyme variation inCucurbita pepo

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Abstract

Cucurbita pepo, represented by cultivated forms of squash, pumpkins, and ornamental gourds, is a morphologically diverse species. Although several classifications of the cultivars have been proposed, none has been fully accepted. In an attempt to clarify the systematics of theC. pepo cultivars, allozyme variation was assayed. Twelve loci representing 6 enzyme systems (GOT, IDH, MDH, PER, PGI, and PGM) were screened. Seven of the loci were polymorphic. Electrophoretic data were collected for 50 accessions representing 14 commercial cultivars and a landrace from Mexico. Statistical analyses of the allozyme data revealed a biochemical basis for characterizing cultivars that agrees with morphology. Principal component analysis and cluster analysis revealed a major subdivision within the species above the level of cultivars. Genetic identities among groups of cultivars were much lower than those usually found among conspecific populations for outcrossing plants, possibly reflecting the influences of populational subdivision, drift, and selection particular toC. pepo.

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  1. Department of Biology, Texas A&M University, 77843, College Station, TX

    Deena S. Decker

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  1. Deena S. Decker
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Decker, D.S. Numerical analysis of allozyme variation inCucurbita pepo . Econ Bot 39, 300–309 (1985). https://doi.org/10.1007/BF02858800

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  • DOI: https://doi.org/10.1007/BF02858800

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