Login
DiscoverChoc

DiscoverChoc

I am the creator (early 2008) and moderator (ongoing) of TheChocolateLife.com, which now counts members in over 160 countries on six continents. I am a graduate of the Rhode Island School of Design (BFA Photography, 1983). Upon graduation, I immediately embraced the world of high technology – computer graphics, interactive multimedia, high definition television production, and the Internet. It was in 1994 that I "found chocolate" and in May, 2001 I started publishing the seminal blog chocophile.com. Over the past dozen-plus years I have become an internationally–recognized independent authority on subjects in cocoa and chocolate. My award-winning book, Discover Chocolate, was published in 2007.

Conversations by @DiscoverChoc
Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L)

Geographic and Genetic Population Differentiation of the Amazonian Chocolate Tree (Theobroma cacao L)

Numerous collecting expeditions of Theobroma cacao L. germplasm have been undertaken in Latin-America. However, most of this germplasm has not contributed to cacao improvement because its relationship to cultivated selections was poorly understood. Germplasm labeling errors have impeded breeding and confounded the interpretation of diversity analyses. To improve the understanding of the origin, classification, and population differentiation within the species, 1241 accessions covering a large geographic sampling were genotyped with 106 microsatellite markers. After discarding mislabeled samples, 10 genetic clusters, as opposed to the two genetic groups traditionally recognized within T. cacao, were found by applying Bayesian statistics. This leads us to propose a new classification of the cacao germplasm that will enhance its management. The results also provide new insights into the diversification of Amazon species in general, with the pattern of differentiation of the populations studied supporting the palaeoarches hypothesis of species diversification. The origin of the traditional cacao cultivars is also enlightened in this study.

journals.plos.org
Loading...
false