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Leucine aminopeptidase polymorphism inPhaseolus and differential elimination of the donor parent genotype in interspecific backcrosses

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Abstract

Starch gel electrophoretic analysis of crude seed (cotyledonary) extracts of Phaseolus vulgaris, P. coccineus,F 1 ,F 2 ,F 3 ,and reciprocal F 1 backcrosses reveals monomorphic and polymorphic forms of leucine aminopeptidase (LAP) in the genus. The polymorphic forms (LAP-II) are controlled by the codominant alleles, Lap-IIa and Lap-IIb.Reciprocal backcrosses to both species show a highly significant deviation from the expected 1:1 ratio when the donor parent allele is transmitted through male gametes. There is not a significant deviation from the expected ratio when transmission is through female gametes. Differential gametic selection, in conjunction with differential sterility, suggests that structural differences exist between the genomes of these species.

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Authors and Affiliations

  1. Department of Biology, Texas Technological College, Lubbock, Texas, USA

    J. R. Wall

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  1. J. R. Wall
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This research was supported in part by U.S. Public Health Service Grants GM 11612 and GM 14941-01.

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Wall, J.R. Leucine aminopeptidase polymorphism inPhaseolus and differential elimination of the donor parent genotype in interspecific backcrosses. Biochem Genet 2, 109–118 (1968). https://doi.org/10.1007/BF01458710

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  • DOI: https://doi.org/10.1007/BF01458710

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