Inheritance of isoenzymes in sessile oak (Quercus petraea (Matt.) Liebl.) and offspring from interspecific crosses
1996
Muller-Starck, G. (Forstwissenchaftliche Fakult der Ludwig-Maximilians-Univ. Muenchen, Freising (Germany). Lehrbereich Forstgenetik) | Zanetto, A. | Kremer, A. | Herzog, S.
Inheritance studies were based on full sib families of sessile oak (Quercus petraea (Matt.) Liebl.) and offspring of interspecific crosses with inclusion of other species of the white oak section, i.e., Quercus robur L., Q. pubescens Willd., Q. toza Bosc. Standard gel electrophoresis and isoelectric focusing were applied in the verification of the mode of inheritance of isoenzymes with respect to different tissues, i.e., seeds, radicles of germinating seeds and bud tissue. Isoenzymes with tissue-specific expression were excluded from segregation studies. The remaining 14 enzyme systems were shown to be controlled genetically by at least 17 polymorphic gene loci. A nomenclature is suggested which includes polymorphism in oak populations in France and Germany. The analyses of two-locus segregations revealed non-random associations in 23 out of 88 combinations which could be tested. At least two groups of gene loci ("linkage groups") appear to be located on the same chromosome, i.e., group 1 with Aap-A, Acp-C, Lap-A, Pgi-B and group 2 with at least Idh-B and 6Pgd-B. Our studies clearly demonstrate the great genetic similarity among oak species within the white oak section (Lepidobalanus). Results from previous studies on the inheritance of isoenzymes in pedunculate oak (Quercus robur L.) are confirmed. Ambiguities with respect to the present taxonomic status of the studied oak species are briefly addressed
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