Abstract：
:Expressed sequence tags (ESTs) provide researchers with a quick and inexpensive route for discovering new genes, data on gene expression and regulation, and also provide genic markers that help in constructing genome maps. Cacao is an important perennial crop of humid tropics. Cacao EST sequences, as available in the public domain, were downloaded and made into contigs. Microsatellites were located in these ESTs and contigs using five softwares (MISA, TRA, TROLL, SSRIT and SSR primer). MISA gave maximum coverage of SSRs in cacao ESTs and contigs, although TRA was able to detect higher order (5-mer) repeats. The frequency of SSRs was one per 26.9 kb in the known set of ESTs. One-third of the repeats in EST-contigs were found to be trimeric. A few rare repeats like 21-mer repeat were also located. A/T repeats were most abundant among the mononucleotide repeats and the AG/GA/TC/CT type was the most frequent among dimerics. Flanking primers were designed using Primer3 program and verified experimentally for PCR amplification. The results of the study are made available freely online database (http://riju.byethost31.com/cocoa/). Seven primer pairs amplified genomic DNA isolated from leaves were used to screen a representative set of 12 accessions of cacao.
journal_name
J Genetjournal_title
Journal of geneticsauthors
Riju A,Rajesh MK,Sherin PT,Chandrasekar A,Apshara SE,Arunachalam Vdoi
10.1007/s12041-009-0030-1subject
Has Abstractpub_date
2009-08-01 00:00:00pages
217-25issue
2eissn
0022-1333issn
0973-7731journal_volume
88pub_type
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