Title
Characterization of Ugandan sweetpotato germplasm using fluorescent labeled simple sequence repeat markers
Date Issued
01 January 2010
Access level
open access
Resource Type
journal article
Author(s)
National Crops Resources Research Institute
Publisher(s)
American Society for Horticultural Science
Abstract
The genetic relationships among 192 superior, high-yielding, and disease-resistant sweetpotato [Ipomoea batatas (L.) Lam] accessions from the Ugandan germplasm collection were analyzed using 10 fluorescent labeled simple sequence repeat (SSR) markers. Relatedness among the genotypes was estimated using the Nei and Li genetic distance coefficient, cluster analysis and principle component analysis methods of NTSYS-pc software. The polymorphic information content of the SSR markers used in this study ranged from 0.23 to 0.76 for loci IB-S07 and IB-R12, respectively, with a mean value of 0.62. The number of polymorphic alleles detected per locus ranged from two to six with a mean of four, a confirmation of the effectiveness of microsatellite detection on an automated ABI 3730 sequencer. The mean pairwise genetic distance among the 192 genotypes was 0.57, an indication of moderately high genetic diversity. Cluster analysis divided the accessions into four major groups with no relationship to the district of origin. Two sets of duplicates were identified through SSR genotyping in this study. Up to 190 distinct accessions for use as potential parental genotypes in hybridization schemes for cultivar development in the region were identified.
Start page
225
End page
230
Volume
45
Issue
2
Language
English
OCDE Knowledge area
Agricultura
Genética, Herencia
Subjects
Scopus EID
2-s2.0-77950427925
Source
HortScience
ISSN of the container
00185345
Sources of information:
Directorio de Producción Científica
Scopus