The allopolyploid origin ofSedum rupestre subsp.rupestre (Crassulaceae)

Autor:	J.M. Sandbrink, A. Van Ooyen, Henk 't Hart, I. Csikos, J. van Brederode
Rok vydání:	1993
Předmět:	biology food and beverages Chromosome Plant Science biology.organism_classification Sedum Crassulaceae Chloroplast DNA Polyploid Botany bacteria Restriction fragment length polymorphism Ploidy Ecology Evolution Behavior and Systematics Hybrid
Zdroj:	Plant Systematics and Evolution. 184:195-206
ISSN:	1615-6110 0378-2697
DOI:	10.1007/bf00937435
Popis:	InSedum rupestre L. a polyploid series (x = 16) occurs in which aneuploid chromosome numbers and odd levels of ploidy prevail. The most common and widely distributed cytotype,S. rupestre subsp.rupestre, is 2n = 112. Plants resemblingS. rupestre subsp.rupestre can be obtained by hybridizing the tetraploid cytotypes ofS. forsterianum Sm. (2n = 48) andS. rupestre subsp.erectum 't Hart (2n = 64). Comparison of these artificial hybrids with their parents and a large number of plants ofS. rupestre subsp.rupestre (2n = 112) from nature showed thatS. rupestre subsp.rupestre and the artificial hybrids are morphologically indistinguishable, and intermediate betweenS. forsterianum andS. rupestre subsp.erectum. MorphologicallyS. rupestre subsp.rupestre is closer to subsp.erectum than toS. forsterianum. Chloroplast DNA restriction patterns ofS. rupestre subsp.rupestre, however, resembleS. forsterianum more closely. The combined results of the hybridization experiments, the analysis of the cpDNA restriction patterns, and the morphological variation indicate the allopolyploid origin ofS. rupestre subsp.rupestre.
Databáze:	OpenAIRE
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