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Assessment of Genetic Diversity and Population Structure in a Selected Germplasm Collection of 292 Jute Genotypes by Microsatellite (SSR) Markers | Banerjee 1 | Molecular Plant Breeding

Assessment of Genetic Diversity and Population Structure in a Selected Germplasm Collection of 292 Jute Genotypes by Microsatellite (SSR) Markers  

Sumana Banerjee1 , Moumita Das1 , Reyazul Rouf Mir2 , Avijit Kundu3 , Niladri Topdar3 , Debabrata Sarkar3 , Mohit K Sinha3 , Harindra S Balyan1 , Pushpendra K Gupta1
1. Molecular Biology Laboratory, Department of Genetics and Plant Breeding, Ch. Charan Singh University, Meerut, 250004, India
2. Global-Theme Biotechnology, International Crops Research Institute for Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, 502324, India
3. Biotechnology Unit, Division of Crop Improvement, Central Research Institute for Jute and Allied Fibres (ICAR), Barrackpore, 743101 West Bengal, India
Author    Correspondence author
Molecular Plant Breeding, 2012, Vol. 3, No. 2   doi: 10.5376/mpb.2012.03.0002
Received: 26 Dec., 2011    Accepted: 02 Feb., 2012    Published: 15 Mar., 2012
© 2012 BioPublisher Publishing Platform
This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Sumana Banerjee et al., 2012, Assessment of Genetic Diversity and Population Structure in a Selected Germplasm Collection of 292 Jute Genotypes by Microsatellite (SSR) Markers, Molecular Plant Breeding, Vol.3, No.2 11-25 (doi: 10.5376/mpb.2012.03.0002)

Abstract

Genetic diversity within the available jute germplasm has not been characterised in detail. Therefore, using 172 SSRs developed in our laboratory, we assessed genetic diversity and population structure in 292 genotypes (including both indigenous and exotic accessions) of two cultivated species (C. capsularis L. and C. olitorius L.). Altogether, as many as 596 alleles (3.46 alleles per locus) were detected. The average values of PIC calculated over all the loci did not differ significantly in the two species (0.198 in C. capsularis and 0.203 in C. olitorius). In C. capsularis, 112 markers (2.55 alleles per locus) and in C. olitorius 140 markers (2.75 alleles per locus) were polymorphic. During both distance based cluster analyses and model based structure analyses, most of the indigenous and exotic genotypes of the two species clearly delineated into separate groups. Basic statistics (Ne, I and He) revealed that the exotic genotypes were slightly more diverse than the indigenous genotypes in C. olitorius while the reverse was true in case of C. capsularis. In each of the two species, low level of population differentiation (Fst) was observed between the indigenous and exotic genotypes, which are also congruent with the results of AMOVA and Nei’s genetic distance, suggesting incidence of gene flow through germplasm exchange across countries. Seven pairs of most divergent genotypes of the two species were identified by pair-wise genetic distance analysis which could be useful for development of jute genotypes with improved fibre yield and fibre quality traits.

Keywords
Corchorus capsularis; Corchorus olitorius; Genetic diversity; Population structure
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