Chromosome Pairing in Polyploid Grasses - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue (Article De Synthèse) Frontiers in Plant Science Année : 2020

Chromosome Pairing in Polyploid Grasses

Résumé

Polyploids are species in which three or more sets of chromosomes coexist. Polyploidy frequently occurs in plants and plays a major role in their evolution. Based on their origin, polyploid species can be divided into two groups: autopolyploids and allopolyploids. The autopolyploids arise by multiplication of the chromosome sets from a single species, whereas allopolyploids emerge from the hybridization between distinct species followed or preceded by whole genome duplication, leading to the combination of divergent genomes. Having a polyploid constitution offers some fitness advantages, which could become evolutionarily successful. Nevertheless, polyploid species must develop mechanism(s) that control proper segregation of genetic material during meiosis, and hence, genome stability. Otherwise, the coexistence of more than two copies of the same or similar chromosome sets may lead to multivalent formation during the first meiotic division and subsequent production of aneuploid gametes. In this review, we aim to discuss the pathways leading to the formation of polyploids, the occurrence of polyploidy in the grass family (Poaceae), and mechanisms controlling chromosome associations during meiosis, with special emphasis on wheat.
Fichier principal
Vignette du fichier
fpls-11-01056.pdf (903.44 Ko) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-02903726 , version 1 (04-06-2021)

Licence

Paternité

Identifiants

Citer

Radim Svačina, Pierre Sourdille, David Kopecky, Jan J. Bartoš. Chromosome Pairing in Polyploid Grasses. Frontiers in Plant Science, 2020, 11, ⟨10.3389/fpls.2020.01056⟩. ⟨hal-02903726⟩
38 Consultations
85 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More