Genome size variation in Chenopodium quinoa (Chenopodiaceae) |
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Authors: | Bozena Kolano Dorota Siwinska Luz Gomez Pando Joanna Szymanowska-Pulka and Jolanta Maluszynska |
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Institution: | (1) Department of Plant Anatomy and Cytology, University of Silesia, Jagiellonska 28, 40-032 Katowice, Poland;(2) Programa de Investigaci?n de Cereales y Granos Nativos – Facultad de Agronom?a, Universidad Nacional Agraria de La Molina, Lima, Peru;(3) Department of Biophysics and Plant Morphogenesis, University of Silesia, Jagiellonska 28, 40-032 Katowice, Poland |
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Abstract: | The extent and significance of intraspecific genome size variation were analysed in quinoa (Chenopodium quinoa Willd.), a pseudocereal important for human consumption in the Andean region of South America. Flow cytometry, with propidium
iodide as the DNA stain, was used to estimate the genome size of 20 quinoa accessions from Ecuador, Peru, Bolivia, Argentina,
Chile and the USA. Limited genome size variation was found among the analysed accessions. The differences between the accessions
were statistically significant but the maximum inter-accession difference between the populations with the largest and the
smallest genome reached only 5.9%. The largest genome was found in population C4 from Chile (mean 3.077 pg/2C) and the smallest
in the Peruvian population P2 (mean 2.905 pg/2C). The variation was not correlated with collection site; however, the quinoa
accessions analysed in this study belonged to three distinct geographical groups: northern highland, southern highland and
lowland. |
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