Variation in nuclear DNA content in Malus species and cultivated apples

The nuclear DNA content for a group of 40 Malus species and hybrids has been estimated using flow cytometry. Estimates of nuclear DNA content for this germplasm collection range from 1.45 pg for Malus fusca (diploid) to 2.57 pg for Malus ioensis (triploid). Among diploids, the nuclear (2C) DNA range...

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Bibliographic Details
Published in:	Genome Vol. 48; no. 5; p. 924
Main Authors:	Tatum, Tatiana C, Stepanovic, Svetlana, Biradar, D P, Rayburn, A Lane, Korban, Schuyler S
Format:	Journal Article
Language:	English
Published:	Canada 01-10-2005
Subjects:	Cell Nucleus - chemistry Cell Nucleus - genetics Chromosomes, Plant DNA, Plant - analysis DNA, Plant - metabolism Genetic Variation Genome, Plant - genetics Malus - genetics Malus - metabolism Ploidies
Online Access:	Get more information
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Summary:	The nuclear DNA content for a group of 40 Malus species and hybrids has been estimated using flow cytometry. Estimates of nuclear DNA content for this germplasm collection range from 1.45 pg for Malus fusca (diploid) to 2.57 pg for Malus ioensis (triploid). Among diploids, the nuclear (2C) DNA ranges from 1.45 pg for M. fusca to 1.68 pg for Malus transitoria. Among triploids, the nuclear (3C) DNA content ranges from 2.37 pg / 3C for Malus sikkimensis to 2.57 pg / 3C for M. ioensis. Given the complexity of the apple genome and its suggested allopolyploid origin, the results obtained in this study confirm earlier reports that polyploids can easily withstand the loss of a certain amount of DNA, and that there is a slight tendency towards diminished haploid nuclear DNA content with increased polyploidy.
ISSN:	0831-2796
DOI:	10.1139/g05-033