Abstract
The objective of this work was to study the genetic variability and the heterozygosity of accessions of the Parinari (Pa) series in the collection of the Active Germplasm Bank (BAG) of the Cocoa Research Center (CEPEC), CEPLAC, Bahia using microsatellite markers. In the present study, 34 accessions of Theobroma cacao L. were used, being 25 of the Parinari series. Twelve microsatellite loci were analyzed generating a total of 49 alleles. Results indicated genetic variability among the Parinari accessions with genetic distances varying from 0.00 to 0.64 and heterozygosity levels between 11 and 72%. About 40% of the accessions presented heterozygosity equal or greater than 50%.
Highlights
Cocoa (Theobroma cacao L.) belongs to the Sterculiaceae family, which contains about 50 genus, the most important being Theobroma
The objective of this work was to study the genetic variability and heterozygosity of Parinari accessions from the germplasm collection at the Centro de Pesquisas do Cacau (CEPEC)/ CEPLAC based on microsatellite markers
In the present study 34 accessions of Theobroma cacao L were used, being 25 of the Parinari (Pa) series with two of them repeated in different rows of the collection, and with 7 suspects to be of the same geographical origin (Table 1)
Summary
Cocoa (Theobroma cacao L.) belongs to the Sterculiaceae family, which contains about 50 genus, the most important being Theobroma. The Upper Amazon accessions, those of the Scavina (Sca) series, Iquitos Mixed Calabacillo (IMC), Nanay (Na), Pound (P) and Parinari (Pa) collected by Pound (1938), are important resistance sources to the main diseases of cocoa (Adomako and Adu-Ampomah, 2000; Luz et al, 1996; Umaharan et al, 2001 and Iwaro et al, 2001). For this reason, such accessions have been globally used in breeding programs
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