Genetic variability of cocoa from the amazon basin: implications for genetic conservation
Biosci. j. (Online)
;
39: e39020, 2023. ilus, tab
Article
in English
| LILACS
| ID: biblio-1415915
ABSTRACT
The cocoa and chocolate production chain involves US$60 billion annually and three million farmers around the world, in an area exceeding nine million hectares. The use of wild germplasm will enable to generate new disease- and pest-resistant cultivars and ability to adapt to changing environments. Here we evaluated 145 cocoa accessions, originated from nine Amazonian basins, based on eight fruit traits. Univariate anova showed significant differences (p<0.05) for all traits. For seven traits, the variance component within basins was higher (81.5%, on average). Therefore, it is recommended that the collection of wild accessions prioritize a larger number of plants from a few populations of the most divergent basins. The multivariate analyses revealed a greater divergence between the Ji-Paraná-RO and Solimões/Amazonas-PA basins (27.69) and a greater similarity between Alien clones-PER and Solimões/Amazonas-AM (0.66) in relation to their populations. They also revealed that the accessions differentiation occurred according to the river basin system. These results allowed elucidate the genetic structure and distribution of cacao populations. In addition, strengthen the importance of collecting and conserving germplasm to preserve genetic resources.
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Subject(s)
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Genetic Variation
/
Cacao
/
Hydrographic Basins
/
Amazonian Ecosystem
/
Seed Bank
Language:
English
Journal:
Biosci. j. (Online)
Journal subject:
Agricultura
/
Disciplinas das Cincias Biol¢gicas
/
Pesquisa Interdisciplinar
Year:
2023
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Comitê Executivo do Plano da Lavoura Cacaueira/BR
/
Universidade Estadual do Maranhão/BR
/
Universidade Federal de Viçosa/BR
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