Phylogenetic Relationships among North American Popcorns and Their Evolutionary Links to Mexican and South American Popcorns von Santacruz‐Varela, A., Widrlechner, M. P., Ziegler, K. E., Salvador, R. J., Millard, M. J., Bretting, P. K.

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Allozyme variation in domesticated annual sunflower and its wild relatives von Cronn, R, Brothers, M, Klier, K, Bretting, P.K, Wendel, J.F

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Managing large diverse germplasm collections von Clark, R.L. (USDA, ARS, Plant Germplasm Introduction and Testing Unit, Pullman, WA.), Shands, H.L, Bretting, P.K, Eberhart, S.A

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Genetic variability among Turkish pop, flint and dent corn (Zea mays L. spp. mays) races: Morphological and agronomic traits von ILARSLAN, R, KAYA, Z, KANDEMIR, I, BRETTING, P. K

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Genetic variability among Turkish pop, flint and dent corn (Zea mays L. spp. Mays) races: Enzyme polymorphism von ILARSLAN, R, KAYA, Z, TOLUN, A. A, BRETTING, P. K

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Karyotypic Variation in Mesoamerican Races of Maize and Its Systematic Significance von Bretting, P. K., Goodman, M. M.

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Changes in Fruit Shape in Proboscidea parviflora ssp. parviflora (Martyniaceae) with Domestication von Bretting, P. K.

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Pollen Morphology of the Martyniaceae and Its Systematic Implications von Bretting, P. K., Nilsson, S.

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Ethnobotany of Devil's Claw (Proboscidea parviflora ssp. parviflora: Martyniaceae) in the Greater Southwest von BRETTING, P. K., NABHAN, G. P.

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Isozymatic Variation in Guatemalan Races of Maize von Bretting, P. K., Goodman, M. M., Stuber, C. W.

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Morphological Differentiation of Proboscidea parviflora ssp. Parviflora (Martyniaceae) Under Domestication von Bretting, P. K.

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New perspectives on the origin and evolution of New World domesticated plants: introduction von Bretting, P.K. (Purdue University, Lafayette, IN)

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Folk Names and Uses for Martyniaceous Plants von Bretting, P. K.

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Isozymatic Variation in Guatemalan Races of Maize von Bretting, P. K., Goodman, M. M., Stuber, C. W.

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Karyological and Isozyme Variation in West Indian and Allied American Mainland Races of Maize von Bretting, P. K., Goodman, M. M., Stuber, C. W.

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Karyological and isozyme variation in West Indian and allied American Mainland races of maize von Bretting, P.K, Goodman, M.M, Stuber, C.W

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Nomenclatural Changes in Proboscidea (Martyniaceae) von Bretting, P. K.

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Geographical intergradation in Proboscidea parviflora ssp. sinaloensis (Martyniaceae) von Bretting, P.K

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Range Extension for Proboscidea sabulosa Correll (Martyniaceae), a Sand Dune Endemic von Bretting, P. K.

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The taxonomic relationship between Proboscidea louisianica and Proboscidea fragrans (Martyniaceae) von Bretting, P. K.

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