Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Cytogenetic evidence of mixed disomic and polysomic inheritance in an allotetraploid (AABB) Musa genotype
Annals of Botany, Volume 110, No. 8, Year 2012
Notification
URL copied to clipboard!
Description
Background and Aims: Edible bananas originated mainly from two wild species, Musa acuminata Colla (AA) and Musa balbisiana Colla (BB), and triploid cultivars with an AAA, AAB or ABB genome are the most widely used. In the present study, chromosome pairing affinities are investigated in a sterile AB Indian variety and in its fertile colchicine-induced allotetraploid (AABB) derivative to determine the inheritance pattern of the tetraploid genotype. The potential implications of interspecific recombination and chromosomal composition of diploid gametes for Musa improvement are presented. Methods:The pairing of different chromosome sets at diploid and tetraploid levels was investigated through a combination of conventional cytogenetic and genomic in-situ hybridization (GISH) analyses of meiotic chromosomes, leading to a likelihood model of the pairing behaviour. GISH analysis of mitotic chromosomes was also conducted to reveal the chromosome constitution of hybrids derived from crosses involving the allotetraploid genotype.Key ResultsAnalysis of chromosome associations at both ploidy levels suggested that the newly formed allotetraploid behaves as a 'segmental allotetraploid' with three chromosome sets in a tetrasomic pattern, three sets in a likely disomic pattern and the five remaining sets in an intermediate pattern. Balanced and unbalanced diploid gametes were detected in progenies, with the chromosome constitution appearing to be more homogenous in pollen than in ovules.ConclusionsColchicine-induced allotetraploids in Musa provide access to the genetic background of natural AB varieties. The segmental inheritance pattern exhibited by the AABB allotetraploid genotype implies chromosome exchanges between M. acuminata and M. balbisiana species and opens new horizons for reciprocal transfer of valuable alleles. © 2012 The Author.
Authors & Co-Authors
Jeridi, Mouna
France, Montpellier
Amélioration Génétique et Adaptation Des Plantes Méditerranéennes et Tropicales Agap
Tunisia, Medenine
Institut Des Régions Arides
Perrier, Xavier
France, Montpellier
Amélioration Génétique et Adaptation Des Plantes Méditerranéennes et Tropicales Agap
Rodier-Goud, Marguerite
France, Montpellier
Amélioration Génétique et Adaptation Des Plantes Méditerranéennes et Tropicales Agap
Ferchichi, Ali
Tunisia, Medenine
Institut Des Régions Arides
D'Hont, Angélique
France, Montpellier
Amélioration Génétique et Adaptation Des Plantes Méditerranéennes et Tropicales Agap
Bakry, Frédéric
France, Montpellier
Amélioration Génétique et Adaptation Des Plantes Méditerranéennes et Tropicales Agap
Statistics
Citations: 24
Authors: 6
Affiliations: 2
Identifiers
Doi:
10.1093/aob/mcs220
ISSN:
03057364
Research Areas
Genetics And Genomics
Health System And Policy