Variation and inheritance of isozyme loci in controlled crosses of Salix alba and Salix fragilis

The expression of polymorphism in different enzyme systems was investigated in clones of Salix alba and Salix fragilis. Dormant buds and sprouting leaves were used but only few consistent enzyme patterns could be revealed and wereretained for further testing. When considering all obtained enzyme pro...

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Published in:	Silvae genetica Vol. 47; no. 2-3; pp. 88 - 94
Main Authors:	Triest, L, Degreef, B, Dhaeseleer, M, Echchgadda, G, Vanslycken, J, Coart, E
Format:	Journal Article
Language:	English
Published:	Frankfurt am Main Sauerländer 01-09-1998
Subjects:	Agronomy. Soil science and plant productions Biological and medical sciences CLONE CLONES DIPLOIDIA DIPLOIDIE DIPLOIDY EPREUVE SUR LA DESCENDANCE Fundamental and applied biological sciences. Psychology GENE Generalities. Genetics. Plant material GENES Genetic resources, diversity Genetics and breeding of economic plants HETEROCIGOTOS HETEROZYGOTE HETEROZYGOTES HIBRIDACION HYBRIDATION HYBRIDIZATION Interspecific and intergeneric hybridization, introgressions ISOENZIMAS ISOENZYME ISOENZYMES Plant breeding: fundamental aspects and methodology Plant material POLIMORFISMO POLIPLOIDIA POLYMORPHISM POLYMORPHISME POLYPLOIDIE POLYPLOIDY PROGENY TESTING PRUEBAS DE DESCENDENCIA SALIX ALBA SALIX FRAGILIS Belgium Europe Genetic variability Leucyl aminopeptidase Genetic marker Isozyme Biological evolution Enzymatic system Biochemistry Hybridization Genetic determinism Progeny test Isomerases Dicotyledones Angiospermae Aspartate transaminase Interspecific hybridization Genetics Hardwood forest tree Salix alba Phosphotransferases Species Clone Polyploidy Intraspecific relation Enzyme Genetic resource Aminopeptidases Transferases Hybrid Genetic diversity Experimental study Salicaceae Phosphoglucomutase Peptidases Transaminases Genetic improvement Intramolecular transferases Hydrolases Spermatophyta Salix fragilis Molecular biology Polymorphism
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Summary:	The expression of polymorphism in different enzyme systems was investigated in clones of Salix alba and Salix fragilis. Dormant buds and sprouting leaves were used but only few consistent enzyme patterns could be revealed and wereretained for further testing. When considering all obtained enzyme profiles, a total of 43 genes could be scored, of which 15 may show polymorphism within S. alba or S. fragilis. Polymorphism was observed in aconitase, alcohol dehydrogenase, phosphoglucomutase, leucine aminopeptidase, glutamate oxaloacetate transaminase, beta- esterase, isocitrate dehydrogenase, glutamate dehydrogenase, peroxidase, superoxide dismutase and xanthine dehydrogenase. The genetic basis of phosphoglucomutase, leucine aminopeptidase glutamate oxaloacetate transaminase and shikimate dehydrogenase could be inferred directly from intraspecific and interspecific controlled crosses. Full- sib progeny showed mendelian segregation for lap-1 and most of the pgm-2 alleles, whereas in other genes such as beta- est-1 and adh-2, there was only fixed heterozygosity. Most of the isozymes can not be used directly as good markers at species level. Differences between S. alba and S. fragilis are mainly in the allele frequencies. The number of genes and alleles of the polyploid S. alba and S. fragilis were compared to those of earlier reports on diploid Salix species. The polyploids contain less genetic diversity in their soluble enzymes than the diploids. Duplicatedgenes did not led to a substantial increase in the heterozygosity levels in the S. alba-S. fragilis complex.
Bibliography:	F30 1999T30066 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0037-5349 2509-8934