Genetic analysis of the domestication syndrome in pearl millet (Pennisetum glaucum L., Poaceae) : inheritance of the major characters

Poncet Valérie, Lamy F., Enjalbert Jérôme, Joly Hélène, Sarr Amadou, Robert T.. 1998. Genetic analysis of the domestication syndrome in pearl millet (Pennisetum glaucum L., Poaceae) : inheritance of the major characters. Heredity, 81 : 648-658.

Autre titre : Analyse génétique du syndrome de domestication chez le mil (Pennisetum glaucum L., Poaceae) : hérédité des principaux caractères

Résumé : The inheritance of domestication traits distinguishing pearl millet (#Pennisetum glaucum#) from its wild relatives (#P. mollissimum#) was assessed in F2 progenies derived from a cross between a typical landrace of pearl millet and a wild ecotype. Despite a high level of recombination between the two genomes, the existence of preferential associations between some characters was demonstrated, leading, in particular, to cultivated-like phenotypes. Traits determining spikelet structure showed simple Mendelian inheritance. Moreover, the genes encoding these traits mapped in a linkage group where quantitative trait loci for spike size and tillering habit were found. This linkage group could correspond to one of the two chromosome segments that have already been shown to be involved in the variation for spikelet structure in progenies from several cultivated x wild crosses. A synthetic map of these two regions is given. The evolutionary significance of this genomic organization in relation to the domestication process is discussed, as well as its potential use for pearl millet genetic resources enhancement.

Mots-clés Agrovoc : Cenchrus americanus, carte génétique, domestication, hérédité, conservation du matériel génétique, Pennisetum

Classification Agris : F30 - Génétique et amélioration des plantes

Auteurs et affiliations

• Poncet Valérie
• Lamy F.
• Enjalbert Jérôme
• Joly Hélène, CIRAD-FORET-DIR (FRA)
• Sarr Amadou
• Robert T.

Source : Cirad - Agritrop (https://agritrop.cirad.fr/390556/)

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