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Preliminary studies concerning chromosome constitution of some Cornus mas L. genotypes (Bacau district)

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Author(s): Elena Truta | Gabriela Capraru | Craita-Maria Rosu | Stefania Surdu | Gogu Giorghita | Viorel Ionel Rati

Journal: Analele Ştiinţifice Ale Universităţii Alexandru Ioan Cuza din Iași,Sectiunea II A : Genetica si Biologie Moleculara
ISSN 1582-3571

Volume: 10;
Issue: 3;
Date: 2009;
Original page

ABSTRACT
: The cytogenetic characterization is necessary to decipher the controversies on biogeography, taxonomy and evolution of the genus, evolution of chromosome number. Some of Cornus species have the following diploid chromosome numbers: Cornus suecica L. 2n=22, Cornus mas L. 2n=18, 54, Cornus sanguinea L. 2n=22, Cornus sericea L. 2n=22, Cornus alba 2n=22. Our preliminary observations performed on Cornus mas genotypes (Bacau district) confirmed the existence of 2n=18 chromosomes. Karyotypic formula is 2n = 18 = 14m + 4sm, the centromeres having median and submedian position. Chromosome size ranged between 2.92 – 4.63 microns, with variability limits from 2.86 to 4.71 microns. The length of haploid complement is 33.62 microns. Centromeric index varies from 36.14 to 44.83, while the arm ratio values are comprised in interval 1.23 - 1.77.

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