Genetic diversity and relationships of sweetpotato and its wild relatives in <i>Ipomoea</i> series <i>Batatas</i> (Convolvulaceae) as revealed by inter-simple sequence repeat (ISSR) and restriction analysis of chloroplast DNA. Huang, J. C. & Sun, M. Theoretical and Applied Genetics, 100:1050–1060, 2000. abstract bibtex Genetic diversity and relationships of 40 accessions of Ipomoea, representing ten species of series Batatas, were examined using ISSR markers and restriction-site variation in four non-coding regions of chloroplast DNA. A total of 2071 ISSR fragments were generated with 15 primers in these accessions and, on average, 52 bands per accession were amplified. Most of the primers contained dinucleotide repeats. The ISSR fragments were highly polymorphic (62.2%) among the 40 accessions studied. Restriction analysis of chloroplast (cp) DNA revealed 47 informative restriction-site and length mutations. Phylogenetic analyses of ISSR and cpDNA datasets generally revealed similar relationships at the interspecific level, but the high polymorphism of ISSRs resulted in a better separation of intraspecific accessions. However, the combined ISSR and cpDNA dataset appeared to be appropriate in resolving both intra and interspecific relationships. Of the species examined, I. trifida was found to be the most closely related to cultivated sweetpotato, the hexaploid I. batatas, while I. ramosissima and I. umbraticola were the most distantly related to I. batatas within the series. Ipomoea triloba, hitherto considered to be one of the ancestors of sweetpotato, was only distantly related to sweetpotato based on ISSR similarity index.
@article{huang_genetic_2000,
title = {Genetic diversity and relationships of sweetpotato and its wild relatives in \textit{{Ipomoea}} series \textit{{Batatas}} ({Convolvulaceae}) as revealed by inter-simple sequence repeat ({ISSR}) and restriction analysis of chloroplast {DNA}},
volume = {100},
shorttitle = {Ipomoea batatas {ISSR} (2000)},
abstract = {Genetic diversity and relationships of 40 accessions of Ipomoea, representing ten species of series Batatas, were examined using ISSR markers and restriction-site variation in four non-coding regions of chloroplast DNA. A total of 2071 ISSR fragments were generated with 15 primers in these accessions and, on average, 52 bands per accession were amplified. Most of the primers contained dinucleotide repeats. The ISSR fragments were highly polymorphic (62.2\%) among the 40 accessions studied. Restriction analysis of chloroplast (cp) DNA revealed 47 informative restriction-site and length mutations. Phylogenetic analyses of ISSR and cpDNA datasets generally revealed similar relationships at the interspecific level, but the high polymorphism of ISSRs resulted in a better separation of intraspecific accessions. However, the combined ISSR and cpDNA dataset appeared to be appropriate in resolving both intra and interspecific relationships. Of the species examined, I. trifida was found to be the most closely related to cultivated sweetpotato, the hexaploid I. batatas, while I. ramosissima and I. umbraticola were the most distantly related to I. batatas within the series. Ipomoea triloba, hitherto considered to be one of the ancestors of sweetpotato, was only distantly related to sweetpotato based on ISSR similarity index.},
language = {English},
journal = {Theoretical and Applied Genetics},
author = {Huang, Jun Chao and Sun, Mei},
year = {2000},
keywords = {ISSR, Ipomoea batatas (L.) Lam., RFLP, chloroplast DNA, genetic diversity, sweetpotato},
pages = {1050--1060},
}
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