Froelicher Y., Luro François, Ollitrault Patrick.
2000. Analysis of meiotic behavior of the tetraploid Clausena excavata species by molecular marker segregation studies.
In : 9th ISC Congress, 3-7 December 2000, Orlando (Etats-Unis). International Society of Citriculture
Résumé : Species of the subfamily Aurantioideae are mainly diploid. The existence of polyploid plants within diploid species have been described. They are mostly triploids resulting from 2n garnetes and letraploids coming from the doubling of nucellar cells. Only two species, Fortunella hindsii and Clausena excavata, are describe as totally tetraploid, but the origin of this tetraploidy is not known. The objective of this workwasto study the mechanisms of Clausena excavata meiosis by molecular marker segregation analysis. Two Sequence-Tagged Microsatellite Sites (STMS) loci and one isoenzymatic locus (PGI) are tested on a population of Clausena excavata obtained by androgenesis. All these markers display a disomic inheritance which is the proof of an allotetraploid origin of Clausena excavata. Thus, Clausena excavata is the first allotetraploid species described in the Aurantioideae subfamily. This approach should be extended to the tetraploid somatic hybrids used as parents for triploid synthesis to predict the genetic structures of the 2n gametes.
Classification Agris : F30 - Génétique et amélioration des plantes
Auteurs et affiliations
- Froelicher Y., CIRAD (GLP)
- Luro François, INRA (FRA)
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Ollitrault Patrick, CIRAD-FLHOR-ARF (GLP)
ORCID: 0000-0002-9456-5517
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/477426/)
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