Karyotype Variation in Eight Cultivars of Indian Dessert Banana (Musa acuminata L.) of section Eumusa From Odisha, India
Karyotype and chromosome number in desert banana of Odisha
Keywords:Chromosome arm ratio, Chromosome number, Dessert banana, Karyotype, Musa, Ploidy.
Banana (Musa spp.) cultivars especially dessert banana are important cash crop with high market demand all over the world as an integral part of the diet. The need for assessment of cytogenetic characters in Musa cultivars is inevitable as out of thousands of cultivars, cytogenetic characterization of most of them remains unresolved due to difficulties like small chromosome size, diversity in ploidy levels and high cultivar diversity which behave differently to standardized cytogenetic protocols. In this report, somatic chromosome number, detailed karyotype analysis including total chromosome length, volume, form percentage, Interphase Nuclear Volume (INV) were accessed on eight dessert type of Musa accessions from different places of Odisha. All the cultivars studied were found triploid (2n = 33) with a basic chromosome number of x=11. The karyotype formulae were assigned to each cultivar by grouping the chromosome according to their shared characteristics. The total chromosome length ranged from 54.95 µm in cv. Robusta to 81.5 µm in cv. Kathia with symmetric karyotype in all the studied cultivar. Karyotype formula revealed structural variation of chromosome with TF% variation from 35.65% in cv. Amritapani to 41.68% in cv. Patakpura that confirms more number of nearly median constricted chromosome as compared to sub-median chromosome. The total chromosome volume recorded from 10.78 µm3 in cv. Robusta to 15.99 µm3 in cv. Khatia and the INV varied from 1336.44 µm3 in cv. Dwarf Cavendish to 2048.37 µm3 in cv. Patakpura. The recorded structural variation might be due to differential genome specific condensation of chromosome. Chromosome length and volume found statistically significant among the cultivars.
Department of Botany
University of Tripura
2.Professor Nabarun Ghosh
Professor of Biology
Department of Life Earth and Environmental Sciences
West Texas A&M University
PO Box 60808, Canyon
Texas 79016-0001 USA
3. Madhuparna Banerjee Ph.D
Senior Scientist cum Associate Professor,
Department of Plant Biotechnology,
Birsa Agricultural University, India,
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Copyright (c) 2021 Shomina DEHURY, Subrat Kumar DEHERY, Anath Bandhu Das
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