Insight into the biology, genetics and evolution of the Centella asiatica polyploid complex in Madagascar

Rakotondralambo Raoseta Soaharin'my Ony, Rodier-Goud Marguerite, Rivallan Ronan, Lussert Alexandra, Danthu Pascal, De Lamotte Frédéric, Ralambofetra Eliane, Ramavovololona Perle, Noyer Jean-Louis, Baurens Franc-Christophe. 2013. Insight into the biology, genetics and evolution of the Centella asiatica polyploid complex in Madagascar. Industrial Crops and Products, 47 : 118-125.

https://doi.org/10.1016/j.indcrop.2013.02.022

Article de revue ; Article de revue à facteur d'impact

Version publiée - Anglais
Accès réservé aux personnels Cirad
Utilisation soumise à autorisation de l'auteur ou du Cirad.
document_568671.pdf
Télécharger (722kB)

Quartile : Q1, Sujet : AGRONOMY / Quartile : Q1, Sujet : AGRICULTURAL ENGINEERING

Résumé : Centella asiatica is an important industrial crop in Madagascar that is collected in the wild for its triterpenic glycoside compounds. A multidisciplinary approach was applied to study diversity of 6 populations of C. asiatica. Cytogenetical approach and fluorescent in situ hybridization (FISH) analysis coupled with cytological evaluation of stomata density revealed diploid (2n = 2x = 18) and tetraploid (2n = 4x = 36) populations. Genetic diversity was evaluated through SSR analysis and indicates three separated groups, clearly distinct from Indian and South African genotypes. Chloroplast diversity analysis reveals two chlorotypes corresponding to diploid and tetraploid populations respectively, indicating an ancient origin of polyploidy. Triterpenic glycoside content of some clones was evaluated confirming that active compound content is highly variable. Implications of our results for further genetic studies and set-up breeding program are discussed.

Mots-clés Agrovoc : Apiaceae, plante médicinale, biologie, cytogénétique, évolution, polymorphisme, triterpénoïde, variation génétique, amélioration des plantes, composition chimique, cytologie, marqueur génétique, nombre chromosomique, polyploïdie