Inheritance of isozymes in peach x Prunus kansuensis and peach x Prunus davidiana hybrids |
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| Authors: | Joseph C Goffreda J M Armstrong Nick Shawn A Mehlenbacher N Vorsa |
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| Institution: | (1) Department of Horticulture, Cook College, Rutgers University, 08903 New Brunswick, NJ, U.S.A.;(2) Present address: Department of Horticulture, Oregon State University, 97331 Corvallis, OR, U.S.A. |
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| Abstract: | Summary Isozyme variation and inheritance were investigated with starch gel electrophoresis in peach (Prunus persica L. Batsch) x P. kansuensis Rehd. and peach x P. davidiana (Carr.) Franch. interspecific hybrids. Of five enzyme systems surveyed for polymorphism, four systems were identified as polymorphic isocitrate dehydrogenase (IDH, EC 1.1.1.41), phosphoglucomutase (PGM, EC 2.7.5.1), aspartate aminotransferase (AAT, EC 2.6.1.1), and 6 phosphogluconate dehydrogenase (PGD, EC 1.1.1.44)] and may be useful as genetic markers in future cultivar and rootstock development. Analysis of progenies segregating for pairs of loci suggests a possible linkage between the loci coding for Aat-1 and Pgd-2. Independent assortment was observed for isozyme loci Idh/Pgm-2, Idh/Aat-1, Idh/Pgd-2, Pgm-2/Aat-1, Pgm-2/Pgd-2, and Aat-2/Aat-1. The red leaf locus, Gr, assorted independently of the isozyme loci: Idh, Pgm-2, Aat-1, and Pgd-2. |
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| Keywords: | allozyme fruit breeding interspecific hybrids linkage peach Prunus species |
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