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Karyotype analyses and studies on the nuclear DNA content in 30 genotypes of potato ( Solanum tuberosum ) L. by I.C. Mohanty; D. Mahapatra; S. Mohanty; A.B. Das is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Abstract The cytophotometric estimation of 4C DNA content, and karyotypic and somatic chromosome number analyses were carried out in 30 genotypes comprising seven cultivars and 23 advanced breeding lines of __Solanum tuberosum__. Detailed karyotype analysis revealed genotype specific chromosomal characteristics and structural alterations in chromosomes of the genome, with a rare phenomenon of aneusomatic (2__n__ = 4__x__ + 2 = 50) condition in cv.K. Chandramukhi. The origin of this variation could be attributed to mitotic non‐disjunction in the shoots giving rise to aneusomatic roots. Highly significant variations in the genome length, volume and total form percentage were noted at the cultivar level. The total chromosome length varied from 84.56 μm in cv.K. Pukhraj to 127.62 μm in MS/89‐60, with an average value of 100.94 μm ± 1.82. Total chromosome volume varied from 57.22 μm^3^ in MS/92‐1090 to 132.64 μm^3^ in JW‐160. Significant variations in the 4C DNA content (7.28–15.83 pg) were recorded at the cultivar level, with an exceptionally high DNA content (22.24 pg) in cv.K. Chandramukhi. This could be due to the aneusomatic condition of this genotype. Correlation studies reveal

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Author

I.C. Mohanty; D. Mahapatra; S. Mohanty; A.B. Das

Publisher

Elsevier Science; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley (ISSN 1065-6995)

Published

2004

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)