NDLI: Genetic diversity and spatial structure in a new distinct Theobroma cacao L. population in Bolivia

Content Provider	Springer Nature Link
Author	Zhang, Dapeng Martínez, Windson July Johnson, Elizabeth S. Somarriba, Eduardo Phillips Mora, Wilberth Astorga, Carlos Mischke, Sue Meinhardt, Lyndel W.
Copyright Year	2011
Abstract	Cacao (Theobroma cacao L.) is an important economic crop in the Bolivian Amazon. Bolivian farmers both cultivate cacao, and extract fruits from wild stands in the Beni River region and in valleys of the Andes foothills. The germplasm group traditionally used is presently referred to as “Cacao Nacional Boliviano” (CNB). Using DNA fingerprinting technology based on microsatellite markers, we genotyped 164 Bolivian cacao accessions, including both cultivated and wild CNB accessions sampled from the Amazonian regions of La Paz and Beni, and compared their SSR profiles with 78 reference Forastero accessions from Amazonian cacao populations, including germplasm from the Ucayali region of Peru. Results of multivariate ordination and analysis of molecular variance show that CNB cacao has a unique genetic profile that is significantly different from the known cacao germplasm groups in South America. The results also show that cultivated CNB and wild CNB populations in the Beni River share a similar genetic profile, suggesting that the cultivated CNB is of indigenous origin in Bolivia. The level of genetic diversity, measured by allele richness and gene diversity in the Bolivian cacao, is moderately high, but was significantly lower than gene diversity in the other Amazonian cacao populations. Significant spatial genetic structure was detected in the wild CNB population, using analysis of autocorrelation (rc = 0.232; P < 0.001) and Mantel tests (Rxy = 0.276; P < 0.001). This finding is also highly valuable to support in situ conservation and sustainable use of CNB genetic diversity in Bolivia.
Starting Page	239
Ending Page	252
Page Count	14
File Format	PDF
ISSN	09259864
Journal	Genetic Resources and Crop Evolution
Volume Number	59
Issue Number	2
e-ISSN	15735109
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-03-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alto Beni Bolivia Theobroma cacao Spatial genetic structure Wild population Plant Physiology Plant Genetics & Genomics Agriculture Plant Systematics/Taxonomy/Biogeography Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Ecology, Evolution, Behavior and Systematics Agronomy and Crop Science

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